organization - elex comm of abstracts final.pdffoams and emulsions, continuing bubble and drop...

Organization

COST Action MP1106: Smart and green interfaces ‐ from single bubbles and drops to industrial, environmental and biomedical applications (SGI), and Vinča Institute of Nuclear Sciences, Belgrade, Serbia

Chair of the Action: Prof. Thodoris Karapantsios Email: [email protected] Vice Chair of the Action: Dr Libero Liggieri Email: [email protected]

Scientific Committee:

Thodoris KARAPANTSIOS, Aristotle Univ., Thessaloniki, Greece

Zoran ŠAPONJIĆ, Vinča Institute of Nuclear Sciences, Belgrade, Serbia

Mirjana ČOMOR, Vinča Institute of Nuclear Sciences, Belgrade, Serbia

Victoria DUTSCHK, Univ. Twente, The Netherlands

Libero LIGGIERI, CNR, Genova, Italy

Norman McMILLAN, Drop Technology Ldt, Ireland

Reinhard MILLER, Max‐Planck Institute, Golm, Germany

Victor STAROV, Univ. Loughborough, United Kingdo

Local Organizing Committee:

Mirjana Čomor, Vinča Institute of Nuclear Sciences, Belgrade, Serbia

Email: [email protected]

Zoran Šaponjić, Vinča Institute of Nuclear Sciences, Belgrade, Serbia


Nadica Abazović, Vinča Institute of Nuclear Sciences, Belgrade, Serbia


Marija Radoičić, Vinča Institute of Nuclear Sciences, Belgrade, Serbia


Venue: Kolarac foundation, Studentski Trg No. 5, Belgrade, Serbia

Book of Abstracts

Monday, March 30th

Lobby 8:00 h Registration

Hall 1 (serb . Mala sala) Hall 2 (serb . Josif Pančić) Hall 3 (serb. Milan Grol)

(1. floor) (1. floor)

(basement)09:00 09:15 Opening

09:15 10:00 Invited K. Sefiane

10:00 10:20 Invited M. Cardenas

10:20 10:40 1

10:40 11:10 Coffee break

11:10 11:30 2 11:10 11:30 1 JOINT CLUSTERS MEETING

11:30 11:50 3 11:30 11:50 2 Nanomaterials & Nanotechnologies

11:50 12:10 4 11:50 12:10 3 Nanomaterials for Water Treatment

12:10 12:30 5 12:10 12:30 4 and Purification

12:30 12:50 6 11:10‐13:10

12:50 13:10 7 Vasileios Koutsos

13:10 14:30 Lunch

14:30 15:15 Invited D. Vollmer

15:15 15:35 8 15:20 15:40 5

15:35 15:55 9 15:40 16:00 6

15:55 16:15 10 16:00 16:20 7

16:15 16:35 11 16:20 16:40 8

16:35 16:55 12 16:40 17:00 9

17:00 17:20 10

Lobby COFFEE BREAK AND POSTER SESSION

16:55‐18:00

Tuesday, March 31st

Hall 1 Hall 2 Hall 3

08:30 09:15 Invited R. Rubio

09:15 09:35 1 ESRG MEETING

09:35 09:55 2 9:15 ‐ 10:15

09:55 10:15 3 John Lioumbas


10:45 11:30 Invited E. Chrysina


11:50 12:10 5 11:50 12:10 2 Medical and Food Clusters

12:10 12:30 6 12:10 12:30 3 11:30 ‐ 13:10

12:30 12:50 7 12:30 12:50 4

12:50 13:10 8 12:50 13:10 5 Stefano Guido/Simeon Stoyanov

13:10 14:15 Lunch

MC MEETING

14:15 ‐ 17:15 Thodoris Karapantsios

Lobby COFFEE BREAK AND POSTER SESSION 17:00‐18:00

Wednesday, April 1st

Hall 1 Hall 2 Hall 3

09:00 09:45 Invited C. Buffone


10:05 10:25 2 10:10 10:30 2 Complex Wetting and

10:25 10:45 3 10:30 10:50 3 Heat & Mass Transfer

10:45 11:05 4 10:50 11:10 4 9:50 ‐11:40

11:10 11:30 5 J. G. M. Kuerten


11:55 12:15 5

12:15 12:35 6

12:35 12:55 7

12:55 13:15 8

13:15 13:35 9

13:35 14:00 Closing

Monday, March 30th

Lobby

08:00 9:00 Registration

Hall 1Interface related phenomenaChairs: L. Ligieri, R. Terrazas Mallea Book of abstracts

09:00 09:15 Opening

09:15 10:00 Invited K. Sefiane ‐ Phase change and droplets evaporation from fundamentals to applications p. 1

10:00 10:20 Invited M. Cardenas ‐ Personal experience on setting up EU proposals p. 2

10:20 10:40 D.J.Fairhurst ‐ Classifying dynamic contact line modes in drying drops p. 19


Interface related phenomena, continuingChairs: S. Stoyanov, C. Trabi

11:10 11:30 V. Dutschk ‐ Wetting behaviour of complex aqueous surface active solutions on non‐woven polymer materials p. 10

11:30 11:50 D. Čakara ‐ Protonation of the surfaces with physically adsorbed and chemically bound polyelectrolytes p. 11

11:50 12:10 B. Noskov ‐ Conformational transitions in adsorption layers of globular proteins at the liquid ‐ gas interface p. 12

12:10 12:30 I. Malavasi ‐ Appearance of low superheet "quasi‐Leidenforst" regime for boiling on superhydrophobic surfaces p. 13

12:30 12:50 E. Mileva ‐ Coupling of tensiometric and temperature effects near LCST in aqueous solutions of PNIPAM‐g‐PEO p. 14

12:50 13:10 R. Terrazas Mallea ‐ Particle manipulation using Thermocapillary convective flow p. 15

13:10 14:30 Lunch

Interface related phenomena, continuing

Chairs: R. Miller, C. Hamlett

14:30 15:15 Invited D. Vollmer ‐ How to tune wetting p. 3

15:15 15:35 A. Bykov ‐ Self‐organisaton of polystyrene microparticles in spread monolayer at the water‐air interface p. 16

15:35 15:55 J. Fedotova ‐ Thick‐walled TiO2 nanotubes for synthesis of magnetic multilayered films:effect of surface morphology p. 17

15:55 16:15 L. Cristofolini ‐ Characterization of different dynamical regimes in Langmuir monolayers by two complementary p. 18

techniques operating in real and reciprocal spaces

16:15 16:35 R. Miller ‐ Effect of very small addition of non‐ionic surfactants on the adsorption of proteins p. 9

from low concentrated solutions – what we call “mosquito effect”

16:35 16:55 C. Trabi ‐ Surface tension measurement in liquid‐liquid combinations using dielectrophoresis‐driven spreading p. 20

Hall 2Microfluids and Bubble and drop flow

Chairs: M. Antoni, O. Oikonomidou

11:10 11:30 M. Pascu ‐ Lasing emission by microdroplets of emulsions p. 22

11:30 11:50 M. Ghorbani ‐ Collapse of the Cavitation Bubbles at the Outlet of Microchannels p. 23

11:50 12:10 M. Vlachou ‐ Flow boiling heat transfer as means of cooling in a rectangular macrochannel p. 24

12:10 12:30 A. Sitar ‐ Aqueous n‐butanol solutions performing as a self‐rewetting fluid during boiling in microchannels p. 26

13:10 14:30 Lunch

Interfaces in biosciences and biotechnology Chairs: S. Caserta, J. Lioumbas

15:20 15:40 J. Kiwi ‐ Uniform, adhesive TiO2 biointerfaces leading to accelerated viability loss under light p. 28

and to cultivability loss in the dark

15:40 16:00 V. Koutsos ‐ Microbubble Agents for Biomedical Applications Studied by Atomic Force Microscopy p. 29

16:00 16:20 S. Guido ‐ A microfluidics approach to investigate the flow behavior of red blood cells in microcirculation p. 30

16:20 16:40 J. Krausse ‐ Biology in micro gravity p. 31

16:40 17:00 J. Zawala ‐ The bubble bouncing from stagnant and vibrating hydrophilic and hydrophobic solid surfaces p. 32

17:00 17:20 S. Caserta ‐ Microfluidic mixing of low viscosity Boger fluids p. 25

Hall 3

JOINT CLUSTERS MEETING

Nanomaterials & Nanotechnologies

Nanomaterials for Water Treatment

and+A110 Purification

11:10‐13:10

Vasileios Koutsos


16:55‐18:00

Tuesday, March 31st

Hall 1Foams and EmulsionsChairs: E. Mileva, J. Katona Book of abstracts

08:30 09:15 Invited R. Rubio ‐ Dynamics of Particles Trapped at Fluid Interfaces p. 4

09:15 09:35 C. Hamlet - The effect of vessel wettability on the foamability of ‘ideal’ surfactants and ‘real‐world’ beer heads p. 35

09:35 09:55 M. Krzan ‐ Stable and biodegradable aqueous foams for industrial or biomedical applications p. 36

09:55 10:15 S Stoyanov ‐ Harnessing the power of the interfacial forces for sustainable and scalable production of p. 37

nanoemulsions obtained via bubble‐bursting at a compound interfaces


Foams and Emulsions, continuing

Bubble and drop interfacesChairs: C. G. Koukiotis, Z. Brabcova

10:45 11:30 Invited E. Chrysina ‐Emerging fields and new challenges in the landscape of protein structure‐function p. 5

relationships at gas/liquid or liquid/liquid interfaces

11:30 11:50 A. Dinache ‐ Study of Vancomycin photoproducts, precursors of foam generation p. 3811:50 12:10 S. Bučko ‐ A comparison of functional properties of pumpkin (Cucurbita sp. ) seed protein isolate and p. 39

its two hydrolysates

12:10 12:30 C.S. Iorio ‐ Particle‐laden drop impact on substrates p. 27

12:30 12:50 M. Antoni ‐ Microstructure formation at water paraffin oil interfaces p. 41

12:50 13:10 M. Cabrerizo‐Vílchez ‐ Superhydrophobic coatings to prevent icing in the ski lifts of Sierra Nevada p. 42

13:10 14:15 Lunch

MC MEETING

14:15 ‐ 17:15

Thodoris Karapantsios

Hall 2

ESRG MEETING

John Lioumbas

9:15‐10:15

Diagnostics & Applications Chairs: J.Vejrazka, M. Gannoum

11:30 11:50 S. P. Evgenidis ‐ In‐Vivo Embolic Detector (I‐VED):Research advancements on bubbles detection in living subjects p. 44

11:50 12:10 A. Jeromen ‐ Annular laser beam metal droplet generation from wire and foil p. 45

12:10 12:30 N. McMillan ‐ Addressing the glass ceilings of Nanovolume quantitative and qualitative spectroscopy: p. 46

Fundamental advances and a glimpse at the future

12:30 12:50 G. Wells ‐ Leidenfrost Rotation and a Sublimation Heat Engine p. 47

12:50 13:10 M. A. Frysali ‐ Polymeric surfaces exhibiting photocatalytic activity and controlled wettability p. 48

Hall 3

11:30 ‐ 13:10

JOINT CLUSTER MEETING

Medical and

Food Clusters

Stefano Guido/Simeon Stoyanov


17:00‐18:00


Hall 1Materials and ModelingChairs: S. Guido, A. Staicu Book of abstracts

09:00 09:45 Invited C. Buffone ‐ Thermocapillary phenomena on interfaces: a HURRICANE in a tube p. 6

09:45 10:05 G. Karapetsas ‐ Modeling of dynamic contact lines p. 51

10:05 10:25 G. Bajars ‐ Electrophoretically deposited nanostructured reduced graphene oxide as electrode material p. 52

for lithium ion batteries

10:25 10:45 M. C. Morán ‐ Gelatin‐based nanoparticles for gene therapy: synthesis, physicochemical and in vitro p. 53

cytotoxic characterization

10:45 11:05 M. Radoičić ‐ Photocatalytic efficiency of polyaniline modified TiO2 nanoparticles p. 55


Materials and Modeling, continuingChairs: V. Dutschk, M. Petala

11:55 12:15 S. Perni ‐ Nanocarrier controlled delivery of antibiotics for acrylic bone cement applications p. 56

12:15 12:35 N. Abazović ‐ The Influence of the Solvent/Surfactant Composition on (Cd or Zn)In2S4 Nanocrystalite Formation p. 57

12:35 12:55 J. Kuerten ‐ Direct numerical simulation of droplet‐laden channel flow p. 58

12:55 13:15 S. Sasic ‐ On hydrodynamic interactions between settling particles and rising microbubbles –a Direct Numerical p. 59

Simulation (DNS)

13:15 13:35 M. Muradoglu ‐ Computational modeling of soluble surfactant and viscoelasticity in multiphase flows p. 60

13:35 14:00 Closing

Hall 2Dyspersed systems and Complex liquidsChairs: T. Sosnowski, M. Milieška

09:50 10:10 P. Warszyński ‐ Adsorption of Cleavable Esterquad Surfactants and Polyelectrolytes at the Air/water Interface p. 62

10:10 10:30 I. Szilagyi ‐ Formulation of multifunctional titanate nanowire dispersions by polyelectrolytes p. 63

10:30 10:50 S.Bárány ‐ Electrosurface Properties and Stability of Multi‐walled Carbon Nanotubes with and without p. 64

Laponite Platelets

10:50 11:10 A. Gyurova ‐ Self‐assembly of four‐ and two‐antennary oligoglycines in the bulk of aqueous medium p. 65

11:10 11:30 M. Möbius ‐ Yielding and flow of highly concentrated, few‐layer graphene suspensions p. 66


Hall 3

9:50‐11:40

JOINT CLUSTERS MEETING

Complex Wetting

Heat & Mass Transfer

J. G. M. Kuerten

Invited speakers

1

Presenting Author: Khellil Sefiane Invited speaker E-mail: [email protected] Main Topic: Interface related phenomena

Phase change and droplets evaporation from fundamentals to applications

Khellil Sefiane

School of Engineering, The University of Edinburgh, EH9 3JL, Edinburgh, United Kingdom

We present recent results on the evaporation and wetting of sessile drops. The effect of substrate thermal properties and its influence on evaporation rates is first revisited. Interfacial driven instabilities and their connection with the phase change process is then examined. We briefly report on Hydrothermal Waves (HTWs) in evaporating droplets and the influence of the atmosphere on these latter. The approach to model the above drops using a 3D approach is then presented. Azimuthal flows and instabilities resulting in non-spherical droplets is presented. Finally, the complete description of the lifetime of a droplet on a solid substrate evaporating in a ‘stick–slide’ mode is obtained. The unexpectedly subtle relationship between the lifetime of such a droplet and the lifetimes of initially identical droplets evaporating in the extreme modes (namely the constant contact radius and constant contact angle modes) is described and summarised in an appropriate master diagram. In particular, it is shown that the lifetime of a droplet is not, in general, constrained by the lifetimes of the extreme modes.

2

Presenting Author: Marité Cárdenas Invited speaker E-mail: [email protected] Main Topic: How to write EU proposals

Personal experience on setting up EU proposals

Marité Cárdenasa,b

aDepartment of Biomedical Science, Malmoe University, Malmoe, Sweden bDepartment of Chemistry, University of Copenhagen, Copenhagen, Denmark

I have during the last years been heavily involved in the writing of four European Proposals, one was funded (www.bibafoods.ku.dk) while the others are now under consideration for funding. The work of setting up 1) a sound consortia and 2) a coherent project, relies mainly on the abilities of the coordination team to either be the designer of a puzzle or the puzzle maker. In this talk I will give you my views of what is needed to make the work flow regadless of your stile as coordinator.

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Presenting Author: Ramón Rubio Invited speaker E-mail: [email protected] Main Topic: Interface related phenomena

Dynamics of Particles Trapped at Fluid Interfaces

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Departamento de Química Física I, Facultad de Química, Universidad Complutense, 28040-Madrid

Particles trapped at fluid interfaces are increasingly used for substituting synthetic surfactants in stabilizing emulsions and foams. Furthermore, they can be used as model systems of 2D fluid and solid systems. Even though questions remain open about the interparticle interactions and the particle density dependence of the 2D system, the particle dynamics at the interface, and their use as probes for measuring the shear viscosity of surfactant and polymer monolayers is still rather controversial. The dynamics is very important because it is responsible of the response of emulsion droplets to external mechanical perturbations such as the collisions between droplets. It is also important to the response of the interbubble walls to the shear field due to liquid draining. In this talk after a brief review of the phase diagram of microparticle monolayers, we will describe some technical techniques to follow the dynamics of particles, as well as the theoretical methods for obtaining information such as the diffusion coefficient. Also the sublimation kinetics of 2D-particle monocrystals in particle monolayers will be described. Finally, we will show that following the dynamics of a few particles embedded in a surfactant monolayer can be used to obtain information about the complex shear modulus of the monolayer, though the results are still controversial.

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Monday, March 30th

8

HALL 1

9

Presenting Author: Reinhard Miller Preferred Format: Oral E-mail:[email protected] Main Topic: Interface related phenomena

Effect of very small addition of non-ionic surfactants on the adsorption of proteins from low concentrated solutions – what we call “mosquito effect”

M. Lotfi1,2, E.V. Aksenenko3, S.V. Lylyk4, V.B. Fainerman4, D. Bastani2 and R. Miller1

1 Max Planck Institute of Colloids and Interfaces, Potsdam, Germany

2 Sharif University of Technology, Teheran, Iran 3 Institute of Colloid Chemistry and Chemistry of Water, Kyiv (Kiev), Ukraine

4 Medical University Donetsk, Donetsk, Ukraine

By dynamic surface tension and surface dilational visco-elasticity we investigated the influence of very small amounts of non-ionic surfactants (C12DMPO, C14DMPO, С10ОН and С10ЕО5 at concentrations between 10−8 and 10−4 mol/l) added to

protein solutions of -casein (BCS) and -lactoglobulin (BLG). The protein concentrations in these studies were as low as 10−9 and 10−8 mol/l. We observed changes in the adsorption behaviour of the proteins at concentrations of the added surfactants at which the surfactants alone do not show any adsorption effects at all [1], so that a competitive adsorption cannot explain the experimentally observed phenomena. In order to describe the experimental data by a theoretical model we had to assume an increased surface activity of the protein due to the interaction with the surfactant molecules [2].

The dilational rheology data show a maximum in the visco-elasticity modulus |E| also at very low surfactant concentrations (10−7 to 10−6 mol/l) for mixtures of BCS with С12DMPO and С14DMPO, and for mixtures of BLG with С10ЕO5. In contrast to that, the mixtures of BCS with С10ЕO5 showed only a slight increase in the |E| value. These |E| phenomena can be explained with the same theoretical model, and changes in the surface molar area of the protein molecules had to be assumed due to the interaction with the surfactant molecules [3].

As the observed effects of the added surfactants appear at concentrations where only very few surfactant molecules can interact with each protein molecule, we have to assume a kind of “catalytic” effect, as if a mosquito is flying from place to place and induces certain changes in the protein molecules’ conformation, leading then to a remarkable modification of the conformation and hence adsorption activity.

References 1. M. Lotfi, A. Javadi, S.V. Lylyk, D. Bastani, V.B. Fainerman and R. Miller, Colloids Surfaces A, DOI:10.1016/j.colsurfa.2014.12.065 2. V.B. Fainerman, M. Lotfi, A. Javadi, E.V. Aksenenko, Y.I. Tarasevich, D. Bastani, and R. Miller, Langmuir, 30 (2014) 12812-12818 3. V.B. Fainerman, E.V. Aksenenko, S.V. Lylyk, M. Lotfi and R. Miller, J. Phys. Chem. B, accepted

10

Presenting Author: Victoria Dutschk Preferred Format: Oral E-mail: [email protected] Main Topic: Interface related phenomena

Wetting behaviour of complex aqueous surface active solutions on non-woven polymer

materials

V. Dutschka, V. Puhalja,b, M.M. Bloksmac, P. Oude Lenferinkc, J. Mahyd

aUniversity of Twente, Enschede, The Netherlands bUniversity of Maribor, Maribor, Slovenia cTanatex Chemicals, Ede, The Netherlands

dBonar, Arnhem, The Netherlands

Modern textiles need efficient and reliable pre-treatments. Surface pre-treatment is a key step in improving dyeing, printing or bonding processes that grow in difficulty as the material is complex. New high-performance textiles and films, as they grow in economic importance, need new high efficiency and high added value technologies to be processed. The use of multifunctional finishing seems to be one of the most attractive fields in textile industry. The functionalities relevant to technical textiles are antistatic/conductivity, UV stability, dyeability, antimicrobial and flame retardance. In the fields of antimicrobial and flame retardance, nanotechnologies and nanomaterials have been shown to be promising whereby a reliable pre-treatment with surfactants is often needed for functionalization of highly hydrophobic polymer materials in wet-chemical processes.

Static and dynamic contact angles of aqueous solutions of anionic and nonionic surfactants as well as their mixtures were measured in a wide concentration range on polymer surfaces of non-woven materials – polyamide (PA) and polypropylene (PP). The droplet volume was varied from microliter to picoliter scale for measuring contact angles on rough non-woven surfaces and on a single filament of around 40 micrometer in diameter, respectively. The influence of the degree of substrate hydrophobicity – PA is rather moderate hydrophilic, PP is rather highly hydrophobic in terms of water contact angles, concentration of the solution and ratio of mixtures on the drop spreading was investigated. Additionally, the non-woven surfaces were treated with the surfactant mixtures under investigation and their wettability was studied using droplets of pure water. As anionic surfactant, a surface active agent based on ester of an inorganic acid was investigated, which is used for improving penetration of dyes into densely woven substrates as well as in sizing and lubricating liquors.

Surface tensions of aqueous solutions of the surfactant mixtures under investigation was measured as functions of time in a wide concentration range and at different ratios of the mixtures. Optimal concentrations were obtained using surface tension isotherms and verified by the spreading behaviour of droplets over the polymer surfaces of different surface energy. Surface tension and wetting dynamics of complex aqueous surfactant solutions on smooth (single filament), rough and porous (non-wovens) polymer surfaces were analyzed in order to optimize the concentration and ratio of surfactant mixtures for their further use in pre-treatment of polymer non-wovens.

11

Presenting Author: Duško Čakara Preferred Format: Oral E-mail: [email protected] Main Topic: Interface related phenomena

Protonation of the surfaces with physically adsorbed and chemically bound polyelectrolytes

D. Čakara

Centre for Micro and Nano Sciences and Technologies and Department of Biotechnology, University of Rijeka, Rijeka, HR-51000 Croatia

The proton binding isotherms, measured in the potentiometric titrations at constant ionic strengths, give the insight into

the protonation speciation of polyprotic systems. As well, their interpretation in terms of the effective pK gives a quantitative measure of the electrostatic contribution to the protonation free energy. In this light, the results of several proton binding studies are presented, for polyprotic systems consisitng of polyelectrolytes, either in dissolved state, or bound to charged or neutral surfaces.

The weakly acidic nanoparticles (carboxyl latex, silica) with irreversibly adsorbed strongly cationic poly(diallyldimethylammonium chloride) (DADMAC) exhibit a charge reversal in a narrow pH-range, i.e. the point of zero charge, in which the system aggregates (1,2). Compared with the bare nanoparticle surfaces, the adsorbed polyelectrolyte can induce both positive and negative excess surface charge, depending on the pH and ionic strength. This suggests that in these systems, the electrostatic attraction is the driving force for the adsorption. On the other hand, in the case of weakly basic chitosan adsorbed onto cellulose fibers, the adsorption reduces the charge of both the polyelectrolyte, and the surface (3). This is a consequence of a less polar environment for the amino groups compared with the polyelectrolite in its dissolved state, which suggests that the adsorption is not driven by electrostatic, but predominately hydrophobic interaction.

Another interesting example is the spherical polyamine brush found at the surface of a "frozen" micelle, built in aqueous medium by an irreversible association of the amphiphilic block-copolymers. There, the proton binding isotherms indicate strong influence of the hydrophobic interactions at high ionic strength, while the electrostatic interactions are dominant at low ionic strength, and cause swelling upon charging.

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1) D. Čakara, C. Chassagne, C. Gehin-Delval, M. Borkovec, Colloid. Surface. A, 294 (2007) 174. 2) D. Čakara, M. Kobayashi, M. Skarba, M. Borkovec, Colloid. Surface. A, 339 (2009) 20. 3) D. Čakara, L. Fras, M. Bračič, K. Stana-Kleinschek, Carbohydrate polymers, 78 (2009) 36.

12

Presenting Author: Boris Noskov Preferred Format: Oral E-mail: [email protected] Main Topic: Interface related phenomena

Conformational transitions in adsorption layers of globular proteins at the liquid - gas interface

B.A. Noskova, G. Logliob, A.A. Mikhailovskayaa, R. Millerc, O.Yu. Milyaevaa, M.M. Tihonova

aDepartment of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, 198504 St. Petersburg, Russia bCNR - Istituto per l'Energetica e le Interfasi, Via De Marini 6, 16149 Genova, Italy

cMPI für Kolloid- und Grenzflächenforschung, Wissenschaftspark Golm, D-14424 Golm, Germany

The dilational surface rheology can give information on the protein conformations at the liquid – gas interface inaccessible by other methods. The kinetic dependencies of the dynamic surface elasticity of the most of globular proteins are similar but change strongly under the influence of denaturants of different chemical nature [1]. In this work the methods of surface dilational rheology are applied to mixed solutions of globular proteins and guanidine hydrochloride (GuHCl), urea, ionic surfactants, and polyelectrolytes. The surface viscoelastic behavior is characterized by great diversity and determined by both the strength of denaturing agents and the stability of protein globular structure. In the case of relatively unstable globules of bovine serum albumin both GuHCl and urea result in the protein unfolding in the surface layer. The addition of GuHCl to solutions of more stable lysozyme leads to partial destruction of the protein tertiary structure in the surface layer and thereby to non-monotonical kinetic dependencies of the dynamic surface elasticity. The addition of urea does not change the shape of kinetic curves of the surface elasticity but decreases strongly the surface tension. This effect can be connected with the formation of a molten globule state in the surface layer of lysozyme/urea solutions. The destruction of the protein tertiary structure in the surface layer under the influence of ionic surfactants and polyelectrolytes occurs if the two solutes have opposite charges and is stronger in the former case. The simultaneous addition of GuHCl and sodium polystyrenesulfonate (PSS) to lysozyme solutions results in a strong synergetic effect, unlike the case of lysozyme/PSS/urea solutions, and the dynamic surface elasticity reaches low values, which are characteristic for the entirely unfolded globules. The work was financially supported by the Russian Foundation of Basic Research (project No. 14-03-00670 _а) and St. Petersburg State University (project No. 12.38.241.2014). 1). B.A. Noskov, Adv. Colloid Interface Sci. 206 (2014) 222.

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14

Presenting Author: Elena Mileva Preferred Format: Oral E-mail: [email protected] Main Topic: Interface related phenomena

Coupling of tensiometric and temperature effects near LCST in aqueous solutions of PNIPAM-g-PEO

Elena Mileva, Dimitrinka Arabadzhieva, Borislav Soklev

Department of Interfaces and Colloids, Institute of Physical Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl.11, 1113 Sofia, Bulgaria

Profile Analysis Tensiometer (PAT-1, Sinterface) is used to extract information, related to the conformational changes of the termosensitive polymer PNIPAM-g-PEO in aqueous solutions at changing the temperature in the vicinity of Lower Critical Solution Temperature (LCST). The methodology permits to determine the exact values of LCST and to outline the temperature range where the bulk phase transitions take place. One advantage of this approach is that the probes may have polymer concentration ~10 times lower than the respective minimum quantities necessary for the application of classical bulk methods (e.g. turbidimetry). The procedure is applied for the detailed investigation of the changes in the adsorption layer of PNIPAM-g-PEO with grafting densities 2.2%, 2.7% and 3.2 %(vol), in the presence of various ethanol quantities.

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16

Presenting Author: Alexey Bykov Preferred Format: Oral E-mail: [email protected] Main Topic: Interface related phenomena

Self-organisaton of polystyrene microparticles in spread monolayer at the water-air interface

A.G. Bykova, G. Logliob, R. Millerc, B.А. Noskova

aSt. Petersburg State University, St. Petersburg, Russia bCNR–Istituto per l'Energetica e le Interfasi, Genova, Italy

cMPI fur Kolloid und Grenzflachenforschung, Golm, Germany

Spread monolayers of charged polystyrene (PS) particles at the air/liquid and liquid/liquid interfaces have been intensively studied during the last decades. It was shown that the highly ordered structure of PS microparticles is formed even at low surface coverage.

In this work the dependence of the dilational surface elasticity on surface pressure of spread monolayers of polystyrene microparticles is studied at the water/air interface [1]. The surface rheological measurements together with the data of optical methods allow dividing the whole range of surface pressures into three zones characterized by different monolayer structures. The formation of ordered structure of PS microparticles even at low surface coverage due to the long range electrostatic repulsion was observed by optical methods. The real part of the dynamic surface elasticity in this case is about 50 mN/m. The dilational surface elasticity increases by one order of magnitude up to 550 mN/m with the increase of particle concentration. The high surface elasticity corresponds to the formation of a closely packed monolayer. Approximately the same dynamic surface elasticity has been observed recently for the adsorption layer of silica nanoparticles [2]. The further increase of the surface coverage results in the monolayer collapse and the surface elasticity drops to almost zero.

The deformation of a particle monolayer in the closely packed state leads to the appearance of surface tension gradients. This means that in the course of compression the surface pressure in the center of the trough is lower than close to the moving barriers. Thereby the monolayer collapse occurs not in the whole surface area but only close to the barriers. The relaxation of surface tension gradients can lead to the viscoelastic behavior of the surface layer if the characteristic time of this process becomes comparable to the period of surface area oscillations.

Acknowledgement: The work was financially supported by the RFFI (No. 14-03-00670_a) and St. Petersburg State University (project No. 12.38.241.2014)

1) A.G. Bykov et al., Soft Matter, 10 (2014) 6499. 2) P. A. Yazhgur et al., Soft Matter, 9 (2013) 3305.

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19

Presenting Author: David Fairhurst Preferred Format: Oral E-mail: [email protected] Main Topic: Interace related phenomena

Classifying dynamic contact line modes in drying drops

D.J.Fairhursta and K.A.Baldwinb

aSchool of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK bSchool of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD

Most droplets undergoing evaporation are considered to have constant contact angle (CCA) or constant contact radius (CCR) [1], yet there are numerous examples in the literature that do not fall into these categories. Such example include droplets of pure and binary liquids [2,3], colloidal suspensions [4] and droplets on soft substrates [5]. Here we focus on a a specific alternative mode in which the dewetting is driven by a contracting solidification collar and present results from two very different systems: crystallisation of PEO polymer droplets [6] and gelation in droplets of blood [7]. We show that in a single experimental run, measurement uncertainties mean it can be difficult to distinguish between (i) constant speed dewetting (Ṙ = –cst), as seen in both thin film rupture zones [8] and reactive dewetting [9,10]; and (ii) a family of dewetting behaviours described by Ṙ = –A/R, equivalent to a linear decrease in contact area with time . However, when observing over a range of droplet volumes, only the latter behaviour collapses onto a single dimensionless h – R curve. We use a simple scaling argument to we show that the collapse implies that the receding speed Ṙ is inversely proportional to the three-phase contact radius with a constant of proportionality A. By controlling A through drying conditions and the solidification rate, the evaporation dynamics change continuously from CCR (when A = 0) to “slow receding” (when A is less than a specific value 0 < A < ACCA) to CCA (at a specific value of the constant A = ACCA) and finally to “fast receding” (A > ACCA). The corresponding dried deposits also change from narrow ring, to broad band “doughnut” and finally tall central “pillars” in the case of fast receding [11]. We offer analytical tools which will be useful in the characterization of evaporating droplets in general: dimensionless h – R plots are used to summarize the key changing parameters; volume-independent data collapse helps to distinguish between subtly different dewetting modes; and composite clock-drop images (see below) are a new means of visualizing droplet evolution. We encourage others to be open to the possibility of alternative modes of droplet evaporation with practical implications for problems such as controlling heat transfer in spraycooling systems and the dry-out patterns of multi-component droplets.

1) R. G. Picknett and R. Bexon, J. Colloid Interface Sci., 1977, 61, 336–350. 2) C. Liu, E. Bonaccurso and H.-J. Butt, Phys. Chem. Chem. Phys., 2008, 10, 7150–7157 3) K. Sefiane, S. David and M. E. R. Shanahan, J. Phys. Chem. B, 2008, 112, 11317–11323 4) D. Orejon, K. Sefiane and M. E. R. Shanahan, Langmuir, 2011, 27, 12834–12843. 5) M. C. Lopes and E. Bonaccurso, Soft Matter, 2013, 9, 7942–7950. 6) K. A. Baldwin, M. Granjard, D. I. Willmer, K. Sefiane and D. J. Fairhurst, Soft Matter, 2011, 7, 7819–7826. 7) B. Sobac and D. Brutin, Phys. Rev. E: Stat., Nonlinear, Soft Matter Phys., 2011, 84, 011603. 8) E. Bertrand, T. D. Blake and J. D. Coninck, Colloids Surf., A, 2010, 369, 141–147. 9) P. G. De Gennes, Phys. A, 1998, 249, 196–205. 10) L. Schmirgeld-Mignot, P. Molinas-Mata, S. Poissonnet and G. Martin, Philos. Mag. Lett., 2000, 80, 33–40. 11) K.A. Baldwin and D.J. Fairhust, Soft Matter, 2015

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24

Presenting Author: Maria Vlachou Preferred Format: Oral E-mail: [email protected] Main Topic: Bubble & drop flow

Flow boiling heat transfer as means of cooling in a rectangular macrochannel

M. C. Vlachou, J. S. Lioumbas, T. D. Karapantsios

Division of Chemical Technology, School of Chemistry, Aristotle University, University Box 116, GR-54124, Thessaloniki, Greece

The most efficient way to cool down hot surfaces is boiling, because compared to single-phase processes, it enables

exchanging more energy with a relatively lower temperature increase of the working liquid. Boiling, combined with the inertial (flow) forces increases even more heat transfer rates, since the flow of the working liquid removes bubbles formed on the heated walls. Considering these, flow boiling is an attractive cooling technique (i.e. for photovoltaic chips, nuclear reactors, electronics), yet it is important to determine how bubble dynamics is related to the heat transfer coefficient. So far, there are scarce works to provide insight to the above [1-2].

Aim of this work is to fill this gap and lead to a better understanding of the phenomena governing flow boiling heat transfer mechanisms. For this reason, a device has been constructed with a macro-channel (cross-section: w 40 x h 10 mm), which permits the experimental determination of those working conditions (mass & heat flux) that maximize heat removal. This device also offers simultaneous monitoring of heated surface temperature and bubble dynamics in order to cross-correlate boiling regimes with heat transfer results. Other measurements that take place include: bulk liquid’s temperature & flow rate, pressure drop along the channel, infrared images of temperature profiles arcos the external surface of the boiling section to estimate heat losses and void fraction at the exit of the text section via a patented custom-made non-intrusive impedance technique (IVED).

Preliminary results provide evidence on the relationship between boiling bubble dynamics and heat transfer coefficient and show that higher heat fluxes yield more excessive bubble formation. Information on bubble dynamics (population, growth rate, detachment size and frequency, departure velocity, trajectory etc) appears essential to assess heat transfer. Work in this direction is underway.

1) G. McGranaghan et al., Heat Transfer Eng., 35 (2014) 517. 2) I. Pranoto et al., Appl. Therm. Eng., 70 (2014) 100. Acknowledgements: The work is performed with the support of (1) “Highly efficient flow boiling macro-structured/ macro-porous channels” funded by the European Space Agency (Co. No. 4000106405/12/NL/PA) (2) “Multiphase Analysis of Boiling” (MANBO, MAP Project AO-2004-111 Co. No. 4200020289). The work is performed under the umbrella of COST Action MP1106 and ΙΚΥ Fellowships of excellence for postgraduate studies in Greece – SIEMENS program.

25

Presenting Author: Sergio Caserta Preferred Format: Oral E-mail: [email protected] Main Topic: Bubble & drop flow

Microfluidic mixing of low viscosity Boger fluids

V. Preziosi,a G. Tomaiuolo,a S. Casertaa, S. Guidoa

aLaboratory of Chemical Engineering @ the Interface, Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, UdR INSTM, Università degli Studi di Napoli Federico II, P.le V. Tecchio 80, 80125 Napoli, Italy

Liquid-liquid mixing is a common industrial practice, widely used in a variety of applications, ranging from polymer synthesis and processing to biotechnology. Despite the extensive literature available on the topic, liquid-liquid mixing is still one of the most difficult and least understood mixing problems, especially when one of the two phases shows a non-Newtonian behavior, as often happens in industrial practice. It is well known that the viscoelasticity of one of the phases can prevent the break-up of a single drop in a controlled flow, but very few is known about the mixing of non-diluted emulsions, when one or both the liquid phases show non-Newtonian behavior. A comprehensive characterization of liquid-liquid mixing in these systems is still missing and their application is based more on intuition and vendors claims than on scientific data.

Non-Newtonian fluid flows at the microscale are complex to describe mathematically due to their shear rate dependent viscosity and their elastic behavior, which are greatly enhanced given the typically small residence times. Since non-Newtonian fluids can have elastic behavior and at the same time exhibit nonlinear viscous effects like shear-thinning of the viscosity, it is particularly difficult to study viscoelastic flows in isolation from other effects. However, there’s a class of viscoelastic fluids, known as Boger fluids, in which the viscosity is nearly constant with the shear rate. Boger fluids are particularly important because they enable elastic effects to be probed separately from shear thinning effects.

Here the effect of elasticity on liquid-liquid mixing is discussed. As a continuous reference fluid, a system made of water and glycerin that shows a Newtonian behavior, is used. In order to increase the elasticity and then to study the viscoelastic effect on mixing efficiency a polymer is added to the water - glycerin solution, by forming low viscosity Boger fluids that were used as continuous phase. These fluids consist of dilute concentrations of high molecular weight polymer in a Newtonian solvent, made of a glycerin-water mixture. Two fluids have been formulated by dissolving two anionic polyacrylamides with different molecular weight in a glycerin–water mixture. The final polymer concentration was 75 ppm, PAA75. The dispersed phase is a Newtonian silicon oil with the same viscosity of the suspending fluid.

The reagents were injected into the microreactor with two glass syringes placed on syringe pumps. The syringes are connected by plastic tubes to a stainless steel T-junction of 1 mm, where a premix of the phases takes place, and then the device is connected to two stainless steel frits in 20 μm porosity, that is where the efficient mixing occurs. Then the emulsion flows through a silica capillary that is placed on the motorized x-y stage of an inverted microscope that allows the fluid dynamic behavior of the emulsion to be observed and analyzed. Fig. 1 shows a picture of the experimental set-up. The use of microcapillaries allows generating large deformation rates and then high Weissenberg numbers also in low viscosity elastic fluids, whilst maintaining small Reynolds numbers that is impossible in macroscale systems.

The present study is focused on elasticity effects on liquid-liquid mixing. Fluid dynamic experiments of three fluids, two Boger PAA75 of different elasticity and a Newtonian fluid, in a single capillary have been performed. In this work the set-up of a microfluidic system for liquid-liquid mixing was performed. It was used for mixing emulsions with the two phases showing a Newtonian behavior and when one of the two phases shows a non-Newtonian behavior.

26

Presenting Author: Anže Sitar Preferred Format: Oral E-mail: [email protected] Main Topic: Bubble & drop flow

Aqueous n-butanol solutions performing as a self-rewetting fluid during boiling in microchannels

A. Sitar,a I. Golobiča

aLaboratory for Thermal Technology,Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia

Experimental investigation of flow boiling in microchannels with hydraulic diameters of 25 µm and 50 µm was

performed. Degassed double distilled water, dilute aqueous n-butanol solutions and 100 % butanol were used as the working fluids. The experimental results demonstrate an increased heat transfer coefficient during boiling of the butanol solutions compared to pure water, as the maximum temperatures achieved at the microchannel bottom were up to 10 K lower at the same heat flux. The high-speed visualization of aqueous butanol solutions boiling revealed the formation of a long and thick liquid film during the annular boiling regime, which was crucial for enhancing the heat transfer compared to the pure water or butanol. Analysis showed that the prolonged liquid film originated from the positive surface tension gradient, which is typical for aqueous solutions of long chain alcohols. The positive surface tension gradient and the consecutive Marangoni effect improved the wettability of the dried out surface of the microchannel. The aqueous butanol solutions displayed the attributes of a self-rewetting fluid and enhanced heat transfer.

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28

Presenting Author: John Kiwi Preferred Format: Oral E-mail: [email protected] Main Topic: Interfaces in Bioscience and Biotechnology

Uniform, adhesive TiO2 biointerfaces leading to accelerated viability loss under light and to cultivability loss in the dark

J. Kiwi, S. Rtimi, C. Pulgarin

Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-GPAO, Station 6, CH-1015, Lausanne, Switzerland

The first account is presented for [1-2] transparent, non-scattering TiO2 films on radio-frequency(RF) pretreated polyethylene (PE). These pretreatments allow the PE to bind higher amounts of TiO2 necessary to induce E. coli inactivation in the minute range under simulated sunlight irradiation. The uniform TiO2 film was sputtered buy direct current magnetron sputtering (DC). These higher TiO2 loadings were necessary were necessary to obtain faster bacterial inactivation kinetics on the PE films. The peak shifts in the stretching of the symmetric and asymmetric vibrational infrared spectra of the C-H groups were followed during the time of bacterial inactivation (60 min). A quantitative correlation between the bacterial inactivation time and the hydrophilicity, roughness and IR peak shifts in the stretching vibration of the E. coli outer LPS-layer due to the increase in the -CH2 interbond length. Contact angle determination allowed the quantitative determination of the photo-switching rates related to bacterial inactivation. The production of malon-dialdehyde (MDA) was observed during E. coli loss of viability. PE pretreatment led to a significant increase in the TiO2 loadings on the PE surface as shown by X-ray fluorescence (XRF). Complete bacterial loss of cultivability in the dark on TiO2-polyester (TiO2-PES) was observed. By transmission electron microscopy (TEM) the diffusion of TiO2 NP’s aggregates with the E. coli outer lipo-polyssacharide (LPS) layer is shown to be a prerequisite for the loss of bacterial cultivability. Within 120 min the complete loss of bacterial cultivability on a TiO2-PES 5% sample was observed [3]. Bacterial loss of cultivability on TiO2-PES in the dark was slower compared to the loss of viability observed under light irradiation. The interaction between the TiO2 aggregates and the E. coli cell involves a competition of TiO2 aggregation due to attractive Van der Waals near the TiO2 IEP at pH <7 and the electrostatic attraction with the bacteria cell wall.

This study presents new evidence suggesting that the bacterial loss of cultivability involves an impairment of cell wall membrane integrity. By TEM this study shows that the reaction of the TiO2 NP’s with the E. coli outer cell-wall proceeds in two stages, namely the agglomeration of the almost neutral TiO2 NP’s at physiologic pH followed by the localization/translocation of the NP’s on the bacterial cell wall. Photocatalysis by NP’s TiO2 lead to the complete loss of bacterial viability within 60 min on TiO2-PES samples The shorter bacterial reduction time under light irradiation is attributed to the oxidative stress generated by the ROS produced under light due to the NP’s radical generation. TiO2-PES samples were able of repetitive bacterial disinfection. The use of supported TiO2 NP’s is advantageous compared to TiO2

suspensions where the TiO2 NP’s have to be removed from the solution after each cycle. This precludes continuous disinfection treatment by TiO2 suspensions. The TiO2-PS surfaces presented in this study then make possible continuous disinfection processes and future potential/practical application.

1) S. Rtimi et al., RSC Advances, 201 (2013) 16345. 2) S. Rtimi et al., Surf. Sci. Technol. 254 (2014) 333. 3) J. Nesic, et al., Colloids and Surfaces B: Biointerfaces, 123 (2014) 593.

29

Presenting Author: Vasileios Koutsos Preferred Format: Oral E-mail: [email protected] Main Topic: Interfaces in bioscience and biotechnology

Microbubble Agents for Biomedical Applications Studied by Atomic Force Microscopy

Vasileios Koutsos

Institute for Materials and Processes, School of Engineering, The University of Edinburgh, King’s Buildings, Edinburgh EH9 3FB, United Kingdom

Stable, haemodynamically inert, hollow, micrometer-size spheres composed of an ultrathin nanoscale biocompatible shell which encapsulates an inert gas are used as ultrasound contrast agents and are normally referred to as microbubbles. They are smaller than the smallest blood vessel of a human body to allow improved visualization of the vascular bed and differentiate vascular patterns of tumours non-invasively. Such thin-shelled microstructures can be used as carriers for drug/gene delivery, which is a topic of much current interest in biomedical research. Furthermore, with appropriate surface modification such microbubbles can acquire targeting capability for certain cell types (e.g. cancerous cells). Their nano/micromechanical properties are extremely important since they have to be stable for considerable time until they rupture/degrade under specific conditions in order to release their load in the right place and at the right time. Moreover, materials at the nanoscale (such as thin-shell structures) may behave differently to those on the macroscale, so predicting their mechanical properties presents a challenge. We have conducted a systematic study of both hard-shelled, polymeric-based [1,2] and soft-shelled, phospholipid-based [3] microbubbles employing microcompression by performing atomic force microscopy force-distance curves. Individual microbubbles of different diameter were compressed from few nanometers up to approx. 50% of their initial diameter. We have performed multiple compressions on individual microbbubles to assess their mechanical robustness and measured their stiffness. Furthermore, we used different mechanical theories to estimate the elastic modulus of the microbubble shell. In the case of phospholipid-based shells, we have also estimated the effective elastic modulus of the whole microbubble as (if it was) a homogenous object. We compare and discuss our results with other phospholipid systems, namely supported lipid membranes, vesicles and cells and other recent AFM studies of lipid-coated microbubbles [4, 5]. Furthermore, as microbubble science is expanding to biological targeting and drug/gene delivery, we investigated the characteristics of molecular targeting using modified lipid-shelled microbubbles (biotin–avidin chemistry and the CD31 antibody) to probe individual Sk-Hep1 hepatic endothelial cells. The modified (targeted) microbubbles provide a single distribution of adhesion forces with a median of 93 pN. This interaction was assigned to the CD31 antibody–antigen unbinding event and proves the capability of single microbubbles to target cell lines [6]. 1) E. Glynos, V. Koutsos, W. N. McDicken, C. M. Moran, S. D. Pye, J. A. Ross, V. Sboros. Nanomechanics of Biocompatible Hollow

Thin-Shell Polymer Microspheres. Langmuir 2009, 25 (13), 7514−7522 2) E. Glynos, V. Sboros, V. Koutsos. Polymeric thin shells: Measurement of elastic properties at the nanometre scale using atomic force

microscopy. Materials Science and Engineering: B 2009, 165 (3), 231−234 3) E. Buchner Santos, J. K. Morris, E. Glynos, V. Sboros, V. Koutsos. Nanomechanical Properties of Phospholipid Microbubbles.

Langmuir 2012, 28 (13), 5753−5760 4) J. E. McKendry, C. A. Grant, B. R. G. Johnson, P. L. Coletta, J. A. Evans, S. D. Evans. Force spectroscopy of streptavidin conjugated

lipid coated microbubbles. Bubble Sci., Eng., Technol. 2010, 2 (2), 48−54 5) C. A. Grant, J. E. McKendry, S. D. Evans. Temperature dependent stiffness and visco-elastic behaviour of lipid coated microbubbles

using atomic force microscopy. Soft Matter 2011, 8, 1321−1326 6) V. Sboros, E. Glynos, J. A. Ross, C. M. Moran, S. D. Pye, M. Butler, W. N. McDicken, S. B. Brown, V. Koutsos. Probing microbubble

targeting with atomic force microscopy. Colloids and Surfaces B: Biointerfaces 2010, 80 (1), 12−17

30

Presenting Author: Stefano Guido Preferred Format: Oral E-mail: [email protected] Main Topic: Interfaces in bioscience and biotechnology

A microfluidics approach to investigate the flow behavior of red blood cells in microcirculation

Giovanna Tomaiuoloa, Rosa D’Apolitoa and Stefano Guidoa


Red blood cell (RBC) deformability plays a key role in gas transport between blood and tissues, mostly occurring in the microcirculation, where confined flow conditions are found, meaning that at least one geometrical dimension (capillary diameter) is comparable to cell size. Here, we present a microfluidics model system in vitro to simulate RBC confined flow behavior. The approach is based on microchannels of circular and rectangular cross-section, made of glass and of elastomeric polydimethylsiloxane, respectively. The latter material is used to fabricate blood-on-chip devices by soft-lithography techniques. The microchannel size is in the range of microvasculature in vivo (from 5 to 100 microns). RBC suspensions with volume fractions between 10 and 20%, which are typical of microcirculation, are fed to the microchannels by using microfluidics pumping systems where either flow rate or pressure is imposed. The shape of flowing RBCs is captured by high-speed video microscopy and image analysis is exploited for a quantitative determination of fluid dynamics parameters, such as cell velocity and deformation. Good agreement is found by comparing the experimental results with predictions of models and simulations from the literature. In particular, the shape change of RBCs flowing in a diverging channel geometry is exploited to measure the interfacial rheological parameters of the cell membrane. The so obtained values of interfacial viscosity and shear modulus are in good agreement with results from independent experimental measurements from the literature, thus providing a technique to determine interfacial parameters at the single cell level which could be of special interest in pathological situations. The interactions of RBCs with other cells and particles are also investigated.

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Zawala r.edu.pl

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33

Tuesday, March 31th

34

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PrefMain Topic: F

surfactants

and David J.

NG11 8NS, Unitva 4, Switzerlan

hemical compowever, the contgates the effectutions of three rent beers (Guie foamability om. We then comment between bampagne and u

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35

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Aquebubbles separaliquid films badsorption laye

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AcknowledgFinancial suacknowledgeERASMUS PlICSC-PAS.


and biodeg

Krzana, H. P

a J. Haber InstitubInstitu

uto per l’ Energe

ous foams areated by thin liqetween air buers at the liquid

aim is to develoal application. erties of biopo

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P ~15Pa) are obprofile analysilatational visco the chitosan /

m stability in so

gements: upport from ed. Part of thilus – Staff M

cel Krzan edu.pl

gradable a

Petkovab, E. SF.

ute of Catalysis aute of Physical Cetica e le Interfas

e extremely coquid films. Fo

ubbles. The ratd interfaces. op a new bio-inThe specific o

olymers solutiofactant lauroyl cationic surfacur), but thin fe to partial han / LEA mixts by the mixturtability measurically stopped age. The foam

ments are perl foam film thbtained. is tensiometer coelasticity. Th/ LEA mixture

olutions of 500pp(LEA) an

Polish Natis work has bobility for Tra

queous foa

Santinic, E. J. Raverac, L.

and Surface CheChemistry BAS, “si, Consiglio Na

mplex systemsam evolution te of foam dra

nspired, easy dobjective is toons and biopol

ethyl arginatetant, LEA, stro

foam layer. Simhydrophobizatioture a significre of cationic srements perforthe coarsening

m collapsed in t

rformed by thickness in chi

(PAT-2, Sintehe experimentincreased the d

pm chitosan solund silica colloida

ional Scientieen also suppaining Mobilit

ams for ind

Jareka , E. MLigierric, D.

emistry PAS, Nie“Acad. G. Bonchazionale delle Ric

s with a celluland its transieainage depend

degradable, bioo find correlatilymers/surfactae (LEA) or/anongly increasesmilar effect haon of the par

cant increase osurfactant LEArmed in the rog and gas diffusthe whole volu

the Scheludkoitosan solution

erface) is applits clearly showdilational elast

ution with additioal particles Levas

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o-Exerowa mns (52.4 nm) a

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on of cationic susil 0.9%wt. 100/

(grant no. 2OST actions MBilateral coope

PreMain Topic: F

biomedica

arszynskia, R

str. 30-239 Cracfia 1113, BulgarMarini 6 str., 161

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surface rheol

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2011/01/ST8/MP1106, CMeration project

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R. Todorovb,

cow, Poland

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ting of polydisdrainage and

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noparticles (Lemixture and resre of chitosan If we insert ed, again due

ved that the prfilm thickness mum film thic

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gratefully ZON 2020: -BAS and

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Presenting AE-mail: Sime

Harnessinn

Jie F

Bursting of buand ocean–atmsurrounding aisubmicrometre

Dispersal resuWe provide evrather than by the sea surfacean energy-e-ciscience. References

1. “NanoVigolStone

2. “Gett3. “Coll

Collo

Author: SimeeonStoyanov@

ng the powenanoemulsi

Feng1, Matthi

Theodo

1 Departme

3 Laborat

5Departm 6 Dep

ubbles at an airmosphere massir. Here we she oil droplets in

lts from the devidence that drohydrodynamic

e microlayer anient route, wi

oemulsions oblo, Luben N. Ae, Nature Physiting the drops ioid fabrication

oids and Surfac

eon Stoyanov @unilever.co

er of the inions obtain

ieu Roché1, D

or D. Gurkov

ent of Mechanica2 Unilever Res

tory of Physical 4 Department ofment of Chemica

partment of Solid

r/liquid interfas transfer. In thhow that bubbn water.

etachment of aoplet size is secs. We demonsnd of pollutant th potential u

btained via buArnaudov, Simics, 10, 606–61in", Jens Eggern by co-extruces A: Physicoc

om

nterfacial fned via bub

Daniele Vigo

v5, Gichka G

al and Aerospacsearch and DeveChemistry and C

f Mechanical Engal Engineering, Fd State Physics, F

ce is a familiahe latter case, bles bursting a

an oil spray froelected by physstrate the unrecspills by dispe

upscalability, fo

ubble bursting eon D. Stoyan12, 2014. rs, Nature Physusion”, Luben chem. Eng. Asp

forces for sbble-bursti

lo1, Luben N

G. Tsutsuman

e Engineering, Pelopment, VlaardColloid Science, gineering, UniveFaculty of ChemFaculty of Physi

ar occurrence rbubble-burstin

at a compound

om the bottom sicochemical incognized role tersing petroleufor application

at a compounov, Theodor D

sics, 10, 548–5N. Arnaudov

pects, 323, 94–

M

sustainableing at a com

N. Arnaudov2

nova6 and Ho

Princeton Univedingen, The Net Wageningen Unersity College L

mistry, Universityics, University of

relevant to foamng leads to thed air/oil/water-

Figuresystem. compountransluce48; (c) Sevolutionsample sh

of the bubble nteractions betwthat this disperum in the waterns in drug del

und interface",D. Gurkov, Gic

549, 2014. , Simeon D.

–98, 2008.

PrMain Topic: F

e and scalabmpound in

2, Simeon D.

oward A. Sto

ersity, Princeton,therlands ni, The Netherlaondon, UK y of Sofia, Bulga

of Sofia, Bulgaria

m stability, cele dispersal of s-with-surfactan

1. (a) SketchInset: close-

nd interface; ent aqueous phSize distribution of nano drohown in Fig. 1

towards waterween oil molersal mechanismr column. Finalivery, food pr

, Jie Feng, Mchka G. Tsutsu

Stoyanov, Ma

referred FormFoams and em

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Stoyanov2,3,4

one1

, USA

ands;

aria a

ll cultures in bsea-water aerosnt interface can

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(b) Image hase after bubon of the oil; oplets size in c over a week

r during bubblecules and the s

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Matthieu Rochéumanova and H

artien A. Coh

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1) A. Din2) S. Laz3) S. Gas

Author: Andrara.dinache@i

Study of V

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National Institute

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a,b A. Staicu,a

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for Laser, Plasmf Physics, Univer& Development iuto per l' Energe

drochloride (VVCM molecules

used normallyg a pulsed lasering within the in, laser beam c

n and MS specdification of V

ing on the expem VCM solution

ties of gas bubs by exposure tharacterize the uring laser irrahe laser pulse

ycopeptide, as i

cal microscopy

owledge the finnumber PN-II-

n press, http://dx.Sci. Process., 81biol. A, 193 (200

oducts, pre

a V. Nastasa,Ferrari,d M.L

ma and Radiationrsity of Bucharesin Chemistry & Ptica e le Interfas

VCM) solution s occur and phy for treatmentsr beam emittedinterval 1–40mcharacteristics

ctra of VCM soVCM molecule

erimental condns. bbles pendant o UV laser beadimensions of

adiation requir[2,3]. The foa

indicated by th

y image (fluore

nancial suppor-ID-PCE-2011-

.doi.org/10.1016 (2005) 465 – 4708) 187 – 192.

M

ecursors of

,a,b A. Stoicu,L. Pascua

n Physics, Magust, Magurele, RoPetrochemistry, si, 16149 Genov

in ultrapure dhotoproducts ars in solution fod as the fourth

mJ. The exposu(energy, focus

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ditions: from ge

in solutions evams. f the gas bubblres a bubble nuam produces m

he absorption sp

escence mode)

rt of the Roma-3-0922, MEN

6/j.colsurfa.201470.

PrMain Topic: F

f foam gen

,a I.R. Andre

urele, Romania omania 060021 Buchare

va, Italia

de-ionized watre generated. Vorm. h harmonic of aure time was chs waist and pos

ded before andrmation of ph

enerating hydr

videnced the fo

es in the VCMucleation, mosmodifications pectra.

of VCM foam

anian National N-CDI Nucleu

4.08.023.

referred FormFoams and em

eration

ei,a V. Damia

est, Romania

ter to laser raVancomycin (V

a Nd:YAG lashosen function sition, beam di

d after exposurotoproducts th

rophobic and h

formation of am

M foams. st probably genof the VCM m

m

Authority for u project: PN0

38

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an,a E.

adiation of VCM) is a

er fascicle of several

ivergence)

re to laser hat appear

hydrophilic

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nerated by molecules,

Scientific 0939/2009,

39

Presenting Author: Sandra Bučko Preferred Format: Oral E-mail: [email protected] Main Topic: Foams and emulsions

A comparison of functional properties of pumpkin (Cucurbita sp.) seed protein isolate and its two hydrolysates

S. Bučkoa, J. Katonaa, Lj. Popovića, Ž. Vaštaga, L. Petrovićb, J. Frajb, J. Milinkovićb,

a University of Novi Sad, Faculty of Technology, Department of Applied and Engineering Chemistry, Bul. cara Lazara 1, 21000 Novi Sad,

Serbia a University of Novi Sad, Faculty of Technology, Department of Biotechnology and Pharmaceutical Engineering, Bul. cara Lazara 1,

21000 Novi Sad, Serbia

Pumpkin (Cucurbita sp.) seeds are rich in both proteins and oil. After the oil extraction protein content in an oil cake, a by–product of the oil extraction, increases up to 63.5% wt. what makes it rich source of vegetable proteins. The major protein fraction in pumpkin seeds are globular proteins, 12S globulin, called cucurbitin and 2S albumin which together make up 59% of total protein content. For all already known pharmacological activities and high biological balance, functional properties of pumpkin seed proteins are still rather scarcely investigated. Therefore, the aim of this work was to investigate functional properties of pumpkin seed protein isolate (PSPI) and two PSPI hydrolysates. PSPI was enzymatically hydrolysed by alcalase at pH=8 (hydrolysate H1) and by pepsin at pH=3 (hydrolysate H2). Influence of pH (3–8) and ionic strength (0–1 M NaCl) on solubility, interfacial and emulsifying properties of PSPI, H1 and H2 were investigated. Enzymatic hydrolysis improved solubility of PSPI and mitigated the effect of pH on H1 and H2 solubility, which resulted in losing isoelectric point (pI). Depending on pH during hydrolysis and pH of the solution salting–in or salting–out effect occurred. PSPI, H1 and H2 adsorb at air–water and oil–water interface, as evident by increase in surface/interfacial pressure. Emulsions composed of 20% w/w sunflower oil in 1% v/w PSPI, H1 or H2 solution were prepared by Ultraturrax T–25 at 10000 rpm. Emulsions were characterized by mean droplet diameter, d4.3. At pH=3 and pH=8, without NaCl addition, the smallest d4.3 had emulsions stabilized by PSPI, whereas at pH=5 it was emulsion stabilized by H1. In case of emulsions with 0.5 M NaCl the smallest d4.3 at pH=3 had emulsion stabilized by H2 and at pH=5 and pH=8 emulsions stabilized by H1.

40

Presenting Author: Abraham Marmur Preferred Format: Oral E-mail: [email protected] Main Topic: Bubbles & Drops Interfaces

From bubbles of ocean waves to clouds of drops to clouds of bubbles

A. Marmur, Y. Katsir, M. Yarom

Department of chemical engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel

The coalescence and bursting of bubbles of ocean waves is essential for the formation of clouds in the sky. The story of this fundamental, relatively unknown effect is presented, starting with the recent explanation of the mechanism responsible for the stabilizing effect of electrolytes on bubbles. Next, the Kohler effect that is responsible for the stability of water drops in the clouds is discussed. This effect inspired the recent elucidation of a novel mechanism for the possible existence of clouds of bubbles, as described in the presentation.

1)Rate of Bubble Coalescence following Quasi-Static Approach: Screening and Neutralization of the Electric Double Layer, Y Katsir, A Marmur, Scientific reports 4 2)Rate of Bubble Coalescence Following Dynamic Approach: Collectivity-Induced Specificity of Ionic Effect, Y Katsir, A Marmur, Langmuir 2014, 30 (46), 13823-13830 3)Vapor–liquid nucleation: the solid touch, M Yarom, A Marmur, Advances in colloid and interface science, 2015

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SPAN

water in parafmicrometer sizsmall water drof the emulsion

This neighborhood capillary tip intime is evidencdroplets at thmicrostructure

Long neighborhood indicating a deprecise reasoninterfacial tensfinally detach.

Self-emicrostructurefrom the interfshows up as a

Pending HPLCwith [SPAN80

Author: Mickantoni@univ-a

Mic

N80 is a hydropffin oil emulsiozed objects. Mroplets. Once cns. work aims toof water/para

n SPAN80 loaced as illustrathe interface. es. The kinetics

term evolutioof the water/p

ecrease of inten of this swellsions. The agg

emulsifying mees consisting inface. This phenhollow vesicle

C-grade water 0] = 2 g/L. Tem

aël Antoni amu.fr

rostructure

M Aix

Centre Scie

phobic surfactons, the continMicroscopy obcreated, these l

o better underffin oil interfaded paraffin oed in the figurThey progres

s of this proceson shows and paraffin oil interfacial tensionling is not yetgregates slowly

echanisms triggn water micro-nomenon will pe.

droplet at t=0 mperature is set

e formation

M. Schmitt, R

x-Marseille Univentifique de St. J

tant commonlynuous paraffin servations sugatter are transp

rstand this phaces. A simpli

oil is studied ine below. This pssively cover ss strongly depe

increasing roerfaces (see ar

n and the volumt clear. It proby drift along t

gered by SPANdroplets. Thesprogressively r

s (a), 2000 s (t to T=35 °C. S

n at water p

R. Denoyel, M

versité, UMR/CNJérôme, 13397 –

y used for the soil phase beco

ggest that a seported into par

henomenon byified system cn controlled temphenomenon ithe complete

ends on the conoughness and rrow in the figme of the micrbably implies the interface t

N80 exhibit to e micro-dropleremove water f

(b), 4000s (c) Small aggregat

Main T

paraffin oi

M. Antoni

NRS 7246 MADIMarseille Cedex

stabilization ofomes opaque oelf-emulsifyingraffin oil and c

y investigatingconsisting in amperature conis the consequee interface anncentration of the formation

gure (d)). As tiro-droplets the classical self-

towards the bo

two main phaets will, in a sefrom the pendi

and 8000 s (d)tes are evidence

PrTopic: Bubbl

il interface

IREL x 20, France

f emulsions. Wover time indicg process promcontribute to th

g the exchanga water drop pnditions. A darence of the appnd finally geSPAN80 and t

n of micro-droime runs, the dclosest to the

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ases: First, theecond phase, aing drop that, a

). The continued with arrows

referred Formles & drops in

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motes the appehe increasing op

ges taking plapending at therkening of the pearance of waenerate denseltemperature.

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uous phase is ps in (d).

41

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PAN80 to urrence of earance of paqueness

ace in the e end of a

drop with ater micro-ly packed

ates in the elongated

eases. The very low

which they

interfacial drift away

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paraffin oil

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23

Presenting AE-mail: mcab

Sup

F.J. Monte

aDepa

cCETURSA SierdTransportes po

Liquids repconditions1,2, edurability of suof ski resorts. Tclose to the sematerials, suchresulted in satiincorporate the

Fig. 1

1) Liangliang C2) D. Arnaldo d3) S. Tarquini, C


perhydroph

es Ruiz-Cabe

artment of AppliebDepart

rra Nevada S.A., r Cable. S.A, C/

pellent or supee.g. SH coatinuch surfaces haThe particular ea, windy, etc.h as metalic skisfactory solutiem into the ski

Ski lift affecte

Cao et al., Langmdel Cerro et al., PCold Regions Sci

el Cabrerizo

hobic coatin

elloa, M.A. RSeba

ed Physics Facultment of MechanPlaza de Andal

/ Monte Perdido

erhydrophobicngs have beenas been an issulocation and fe) are responsib

ki lifts. To dateions. In this wo lifts of Sierra

ed by overnigh

muir., 25(21) (20Physics Procediaience and Techn

Vílchez

ngs to prev

Rodriguez-Vaastian-Lázaro

lty of Sciences, Unical Engineeringucía 4, Edf. Cetu, Parcela 8D,Po

(SH) surfacen used to prevue due to their pfeatures of Sierble for undesire the efforts ofork, we proposNevada and te

ht icing in Sierr

09) 12444. a, 5 (2010) 231.nology, 100 (201

vent icing i

alverdea, A. Aod, M. Cabre

University of Grg, York Universiursa, 18196 Sierol. Valdeconsejo

s can preventvent icing in particular topora Nevada Ski rable icing in f operator at these to use sever

est their durabil

ra Nevada and

4),50.

in the ski l

Amirfazlib, Aerizo-Vílchez

ranada, Fuente Nity, Toronto, ONrra Nevada Mono, 50410 Cuarte

t icing in surfaircraft propel

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e Ski Resort oral comercial ality, superhydr

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Pr M

lifts of Sier

A Fernández-za

Nueva s/n, 18071N M3J13P, Cananachil, Granada,e de la Huerva, Z

faces exposed llers and wing

res. Icing is alsnada, Spain (menergy and higf Sierra Nevad

and in-house derophobicity and

sed on a superh

referred FormMain Topic: M

rra Nevada

-Salmerónc, D

1 Granada, Spaiada , Spain Zaragoza, Spain

to critical envgs, runways, eo an issue for o

mountains of high thermally cda (CETURSAeveloped SH cd ant-icing efic

hydrophobic su

42

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a

D. San

in

viromental etc3. The operations igh height, conductive

A) have not coatings to ciency.

urface

43

HALL 2

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ea

Presenting AE-mail: sevge

S

a Department of

I-VED (In-

spatial and tempresence in thetechnique meaphases havingsignal analysiscomparing to expected due t

I-VED techsimilar cardio-sufficiently senconductive tissadhesive ECGBubbles were result of diverHospital of Thultrasound meare successfulContinuous Wbubble sensing(not constitutintools are still tany features to

A modifiedearly indicatioand, consequen


Researc

S. P. Evgenid

of Chemical Techb L

-Vivo Embolicmporal resolute human body

asures for varydifferent elec

s/processing haany other con

to bubbles preshnique was fir-vascular systemnsitive to sensues & skin. N

G pads at the sieither injected

rs’ treatment (“hessaloniki, Gasurements. Thlly detected w

Wavelet Transfg. Concerning ng a real DCSested (such as

o bubbles presed version of thn and diagnosintly, of the cor

Fig. 1

is Evgenidis auth.gr

In-Vch advance

disa, K. ZachG. Ka

hnology, School Lab of Hyperbar

c Detector) reftion (Europeany during Decomying excitation ctrical propertieave improved nventional me

sence in the humrst calibrated am with that of se the presenc

Next, a series oites of chest and in the blood “dry dive”) in

Greece. It is mhe obtained re

when ECG padform in the fre

bubbles due tS incident) are

FFT and STFTence. he electrical imis of coronary ronary circulati

Continuous W

Vivo Emboements on b

ariasa, A. Mearagiannisb, S

of Chemistry, Aric Medicine, St.

fers to a patenn Patent Officempression Sick

frequency vales, such as gasensitivity and

ethod allowingman body.

and validated inhumans. It wa

ce of bubbles ~of impedance mnd forearm of circulation ththe Decompre

mentioned that sults show tha

ds are placed equency compto decompressgenerated only

T, wavelets, sp

mpedance spectdisease, based

ion system.

Wavelet Transfo

lic Detectobubbles de

esimerisa, T. S. Stefanidou

ristotle UniversiPaul General H

nted electrical e, Application kness (e.g. in alues the electris bubbles in bd accuracy abog for capturing

n-vitro and theas demonstrated~20 μm in swinmeasurements twenty divers

hrough the cepession Chambein all cases th

at the presence either at the f

ponent 0.5-10 ion, ultrasoundy in the body

pectrograms, H

troscopy devicd on the evalua

orm use for bub

Main T

or (I-VED)etection in

D. Karapanub, M. Kotsio

ity of ThessalonHospital, Thessal

impedance speNumber: EP1

astronauts, scubical impedanceblood or other out two and og considerably

en was tested id that the noveines’ blood flo

was performes, according tophalic vein, or er of Hyperbarhe presence ofof a few bubb

forearm or at Hz of the ac

d measuremenof a few diver

Hilbert Huang T

ce, called Cor-Iation of the bra

bbles detection

PrTopic: Diagn

): living subj

ntsiosa, T. Meoub

iki, P.O. Box 54loniki, Greece

ectroscopy dev14188200.1), a

uba divers, mete of a mediumtissues. The in

one orders of my slight imped

in-vivo on aneel impedance spow by placing ed for bubbles relevant Eurogenerated due

ric Medicine Lf bubbles wasbles injected th

the chest. In cquired signalsnts showed thars. However, sTransform, etc)

IS, is currentlyachial artery en

n in the human

referred Formostics & App

jects

esimerisb,

4124, Thessaloni

vice of exceptaiming to senstro workers, et

m composed ofnnovative hardmagnitude, resdance changes

esthetized swinpectroscopy teelectrodes ovedetection appl

opean safety ree to decompreLab, in St. Paus validated by hrough the cep

both cases, ts enhances conat very few tinseveral signal p) in an effort to

y under develondothelium fun

body.

44

mat: Oral lications

iki, Greece

ional high se bubbles tc). I-VED f dispersed dware and spectively, s as those

nes having echnique is er partially lying self-egulations. ession as a ul General means of

phalic vein the use of nsiderably

ny bubbles processing o correlate

opment for nctionality

45

Presenting Author: Andrej Jeromen Preferred Format: Oral E-mail: [email protected] Main Topic: Diagnostics & Applications

Annular laser beam metal droplet generation from wire and foil

A. Jeromen,a A. Kuznetsov,a E. Govekara

a University of Ljubljana, Faculty of Mechanical Engineering, Laboratory of Synergetics, Aškerčeva 6, 1000 Ljubljana, Slovenia

Metal droplet generation (MDG) is a process which enables a whole spectrum of innovative metal droplet based applications such as 1) micro joining of dissimilar materials and temperature sensitive parts,[1] 2) 3D structuring, as well as 3) micro casting. Using a laser as an energy source in MDG is beneficial since it provides high level of temporal and spatial control of the process energy input and low thermal loads on the surroundings. However, the shape of a laser beam proved to be an important factor in MDG from a wire as well as from a foil. While in the majority of conventional laser applications a Gaussian or top-hat profile of the laser beam is appropriate, such beam shapes were found to cause instabilities in both MDG processes. In this contribution, an annular laser beam system is presented, which has been developed and successfully used in both processes. In MDG from a wire the annular laser beam provided sufficient symmetry of energy input by uniform heating of the wire around its circumference. Consequently a controlled, Rayleigh-Plateau instability based, detachment of a pendent droplet from the wire could be realized.[2] In MDG from a foil, the annular laser beam with a focus below the metal foil enabled controlled detachment of a circular plate and its subsequent melting during the flight.[3] In the contribution, both systems and the corresponding MDG processes including their main characteristics, influential parameters and related process dynamics, and applications will be presented.

1) E. Govekar et al., CIRP Ann.-Manuf. Techn., 58 (2009) 205. 2) A. Kuznetsov et al., CIRP Ann.-Manuf. Techn., 63 (2014) 225. 3) A. Jeromen et al., Phys. Proc., 56 (2014) 720.

46

Presenting Author: Norman McMillan Preferred Format: Oral E-mail: [email protected] Main Topic: Diagnostics & Applications

Addressing the glass ceilings of Nanovolume quantitative and qualitative spectroscopy: Fundamental advances and a glimpse at the future

Norman McMillan

Tallaght Industrial Estate, Dublin 24, Dublin, Ireland

Massive advances in spectroscopy hardware have enabled new generations of UV-visible spectrophotometers to be brought to the market which have addressed important issues in bio and medical applications in particular but have been marketed as nanospectrometers and have questionable theoretical underpinning being based in a questionable way on the Beer Lambert law. The developments of the range of Irish spectrophotometers are developed on new fundamental principles based on ‘true’ nanodrop ray and wave optics delivering traceable, accurate/reproducible, validated, extended dynamic absorption range, direct nanodrop sample monitoring, improved sample handling and most importantly multi-spectra capability never seen before in competitive products. The two glass ceilings of the existing technologies will be identified and the new spectrophotometer theoretical approach described in a general but practical way using the non-collimated light spectroscopy approach of the transmitted light drop analyser (TLDA) to highlight the ‘double-shattering’ breakthroughs this product range offers which give a glance at the future integration of qualitative and quantitative techniques in the first ‘true’ nano-litre drop spectrometer and spectrophotometer. Some applications of this new approach are briefly described to provide a concrete vision of the future of laboratory analytical technologies and protocols.

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Presenting AE-mail: gary

1Department of

Heat engin

which involvechemical energ

Leidenfrosboiling, in hissurfaces has be

Here we prphase-change mby the Leidenfextreme tempe

By fabricatthe turbines atbelow a critica

Using a hygravity and thecaused by the Coupling the Lsublimation-ba

AcknowledgmFaculty of EngEdinburgh for 1. Bloch, H. P. 2. Cook-Chenn3. Leidenfrost, 4. Lagubeau, G

Author: Gary y.wells@north

Le

Gary G. We

of Physics and El

2Schoo

nes are designes a liquid vapogy of the fuel int first noticed ts 1756 tract aeen used for drresent new heamechanism viafrost vapour laerature and preting aluminiumt different tempal disc mass. ydrodynamic me lift provided underlying tur

Leidenfrost rotased cycle as a

Fn

ments: Dr. J. Mgineering and technical suppand Murari, S., S

nault, K. A., ThamJ. G., De Aquae C

G., Le Merrer, M.,

Wells humbria.ac.u

eidenfrost R

ells1, Rodrigo

lectrical Engine

ol of Engineering

3International K

ed to convert hour phase transnto mechanicathe low-frictionabout some coroplet propulsioat engine whicha the Leidenfroayer and the usssure condition

m turbine like speratures, we s

model, we are aby the Leiden

rbine-like surfators to an electmeans of low-

Fig. 1: A Sublineodymium magne

Martin (Reece IEnvironment

port. Steam Turbines : D

mbi, N., & Satry, ACommunis NonnullClanet, C. and Qu

k

Rotation an

o Ledesma-A

ering, NorthumbUn

g, University of EEdinburgh EH

Institute for CarKyushu Univers

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heat into mechasformation. Th

al work and neen properties of

ommon properon [4]. h harvests thermost effect. Thise of alternativens of exotic lanstructures, usinshow that rotat

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imation Heat Enets in motion whil

Innovation), Dat Northumbri

Design, Application. M.,. Smart Materlis Qualitatibus Tr

uéré, D. Leidenfros

nd a Sublim

Aguilar1, Gle

bria University Nnited Kingdom Edinburgh, The KH9 3JL, United Krbon-Neutral Ensity, 744 Motooka 819-0395, Jap

anical work viahese engines oed to be carefuf the instantaneties of water

mal energy fros system has the, non-traditionndscapes. ng standard CNtion can be ach

such a transitiayer. Furthermnet viscous dranerator allowsy harvesting.

ngine: The imagest attached to the t

Dr. A. Stokes ania University a

n and Re-Rating (Mr. Struct. 17, 0430ractatus (Duisburgst on a ratchet. Nat

Main T

mation He

en McHale1 a

Newcastle, Elliso

King’s BuildingKingdom nergy Research (ka, Nishi-ku pan

a a thermodynften involve se

ully designed toeous vaporizati[3] and More

om a rotating bhe added advannal fuels can c

NC machining,hieved above a

tion, which is cmore, we find th

ag that can suss us to illustrate

e shows a rotor top of a rotating dr

nd Prof. A. J. Wand the Schoo

McGraw Hill Prof001 (2008). g, Ovenius, 1756).t. Phys. 7, 395–39

PrTopic: Diagn

at Engine

and Khellil S

on Place, Newca

gs, Mayfield Roa

(I2CNER)

namic cycle, sueveral steps who minimise fricion of a liquid,

e recently, rect

block of dry icentage of a frictcircumvent the

, and placing sa critical tempe

controlled by that the rectificstain the rotatioe the potential

containing eight ry ice block.

Walton for useol of Engineer

fessional, New Yo

8 (2011).

referred Formnostics & App

efiane2,3

astle upon Tyne

ad,

uch as the Ranhen coverting

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e, using sublimtion-free bearin complications

olid CO2 discserature, or, equ

the competitionation of the vaon of the dry-iapplication of

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rk, 2008).

47

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nkins cycle the stored 2]. s thin-film

n ratcheted

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s on top of uivalently,

n between apour flow ice blocks. f the novel

ns; and the iversity of

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Polym

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a Institute o

The develohave been greathe developmeFor this we areappropriate ino

The combiefficient photowidely used assurface area. Oto catalytic coaor more extern

Acknowledgemnational fundsLifelong LearnReligious Affa

1) V. Zorba, et2) E. Stratakis3) S. H. Anast4) G.Kenanaki5) G. Kenanak


meric surfa

. A. Frysali,a,

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nal stimuli as w

ments: This ress through the ning”, NSRF 2airs, Greece.

t al., Adv. Mate, et al., Chem. asiadis, Langmis, et al., Applie

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ni Frysali h.gr

aces exhibi

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ructure and LaseDepartment of Ch

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HALL 1

51

Presenting Author: George Karapetsas Preferred Format: Oral E-mail: [email protected] Main Topic: Modeling

Modeling of dynamic contact lines

G. Karapetsas, N. T. Chamakos, M. E. Kavousanakis and A. G. Papathanasiou

School of Chemical Engineering, National Technical University of Athens, Greece

The impact and spreading of liquid drops on solid substrates is important in a range of industrial processes. A key element of the droplet dynamics is the contact line motion which is ultimately determined by the physicochemical interactions with the substrate. The effect of dynamic contact lines play a significant role in complex situations that may involve the presence of superhydrophobic substrates, Marangoni-driven flows, evaporation, etc. Understanding and modeling the wetting dynamics have been the subject of intense activity at the forefront of fluid mechanics, chemistry, and engineering. One common approach is to model the contact line motion using a relation that couples the contact line speed to the difference between the dynamic and equilibrium contact angles. The latter can be allowed to vary dynamically during the droplet motion through the dependence of the liquid−gas, liquid−solid, and solid−gas surface tensions on the local contact line temperature or surfactant concentration, thereby altering the local substrate wettability along the contact line [1,2,3]. Another difficulty may arise in cases where we expect the presence of multiple or a-priori unknown number and position of contact lines, e.g. in the case of impact and spreading on a structured substrate. In such cases it is often difficult to implement an explicit contact line model. One approach is to use the diffuse interface method, however this requires to solve the flow in the surrounding phase and this can be often quite expensive. We show that an alternative approach is to use a sharp interface continuum-level model which treats the liquid/gas and the liquid/solid interfaces in a unified context by employing an interfacial stress balance augmented with a disjoining pressure term which accounts for the micro-scale liquid/solid interactions [4].

The authors kindly acknowledge funding from the European Research Council under the Europeans Community’s

Seventh Framework Programme (FP7/2007-2013)/ERC grant agreement no. [240710] 1) Karapetsas G, R. V. Craster and O. K. Matar, J. Fluid Mech., 670 (2011) 5. 2) Karapetsas G, K. C. Sahu and O. K. Matar, Langmuir, 29 (2013) 8892. 3) Karapetsas G, K. C. Sahu, K. Sefiane and O. K. Matar, Langmuir, 30 (2014) 4310. 4) Chamakos N. T., Kavousanakis M. E., and Papathanasiou A. G., Langmuir, 30 (2014) 4662.

52

Presenting Author: Gunars Bajars Preferred Format: Oral E-mail: [email protected] Main topic: Materials

Electrophoretically deposited nanostructured reduced graphene oxide as electrode material for lithium ion batteries

K. Kapransa, G. Bajarsa, A. Dorondoa,b, J. Mateussa,c, G. Kucinskisa, J. Kleperisa, A. Lusisa

aInstitute of Solid State Physics, University of Latvia, Kengaraga street 8, Riga, LV-1063, Latvia

bFaculty of Chemistry, University of Latvia, Kr. Valdemara street 48, Riga, LV-1013, Latvia cFaculty of Physics and Mathematics, University of Latvia, Zellu street 8, Riga, LV -1002, Latvia

Recent advances in the technology of microelectronics demand micro power sources. Thin film technology offers an

option of miniaturizing power sources. Most of the thin film electrode materials used in current batteries are deposited by RF or/and DC magnetron sputtering. Other methods include a variety of physical and chemical vapor deposition processes, such as aerosol spray coating and pulsed laser deposition. However above mentioned methods demand high material or energy consumption or they are relatively slow processes and require expensive equipment.

This work addresses the feasibility of an electrophoretic deposition (EPD) method for the preparation of graphene film electrode for lithium ion batteries. EPD technique has many advantages such as low deposition temperature, low consumption of energy as well as low cost and simplicity of equipment. Electrophoretic deposition is an economical and versatile processing technique that has been applied in deposition of coatings and films, as for example phosphors for display. It has many advantages in the preparation of thin films from suspensions, such as high deposition rate and throughput, good uniformity and controlled thickness of the obtained films, no need of binders, and simplicity of scaling up. [1]

Graphene is a new class of two dimensional carbon nanostructure owing exceptional high electric and thermal conductivity and mechanical stiffness. New electrode is made from sheets of graphene which is capable of accommodating more lithium ions and therefore delivers higher energy density than traditional carbon or graphite materials. [2,3]

Graphene oxide nanosheet film was electrophoretically deposited on steel substrate from a stable water suspension with constant concentration 5 mg/ml using potenciostatic mode with the range of electric field 5-30 V/cm. Under the applied electric field, the negatively charged graphene oxide flakes migrated toward the positive electrode, and were subsequently orderly deposited onto the surface of this electrode. The thickness of the graphene oxide films could be tuned ranging from several nanometers to a few micrometers. The deposition electric field was varied in order to obtain films with different thickness and surface area. Graphene oxide thermal treatment was performed by heating at 700 ºC in argon/hydrogen flow. Obtained reduced graphene oxide layers were analyzed by scanning electron microscopy, X-ray diffraction and Raman spectroscopy. These methods confirm the formation of homogeneous multiplayer graphene sheet films. The application of these films as an electrode for lithium ion batteries was tested by various electrochemical methods such a voltammetry, chronopotentiometry, and electrochemical impedance spectroscopy. Electrochemical measurements were performed for reduced graphene oxide thin films in three-electrode cell. The measurements were carried out in an open circuit state, charged and discharged states and during charging and discharging processes.

The financial support of Latvian project of scientific cooperation 666/2014 is greatly acknowledged. Presenting author

G. Bajars acknowledges a financial support from COST action MP 1106.

1) Z.-S. Wu et al., Advanced Materials, 21 (2009) 1756. 2) X. L iet al., Nanoscale, 5 (2013) 12607. 3) G. Kucinskis et al., J. Power Sources, 240 (2013) 66.

53

Presenting Author: Carmen Morán Preferred Format: Oral E-mail: [email protected] Main Topic: Materials

Gelatin-based nanoparticles for gene therapy: synthesis, physicochemical and in vitro cytotoxic characterization

M. C. Morána,b, N. Rosella, G. Ruanoa, M. A. Busquetsb,c, M. P. Vinardella,b

aDepartament de Fisiologia; Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028-Barcelona-Spain bInstitut de Nanociència i Nanotecnologia-IN2UB, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028-Barcelona-Spain

cDepartament de Fisicoquímica; Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028-Barcelona-Spain

Gene therapy offers great opportunities for the treatment of severe diseases including cancer. In recent years the design of synthetic carriers for nucleic acid delivery has become a research field of increasing interest. The rapidly rising demand for therapeutic grade DNA molecules requires associated improvements in encapsulation and delivery technologies. One of the challenges for the efficient intracellular delivery of therapeutic biomolecules after their cell internalization by endocytosis is to manipulate the non-productive trafficking from endosomes to lysosomes, where degradation may occur. Endosomes are vesicles formed within a cell during forms of endocytosis in which the material to be ingested first binds to receptor sites on the cell surface. Because the nanocarriers generally cannot directly cross the lipid bilayer of the endosomes, the pH targeting approach, which can lead to a selective disruption of the endosomal membrane, is regarded as a promising strategy to promote a specific triggered release of active biomolecules. The combination of the endosomal acidity with the endosomolytic capability of the nanocarrier can increase the intracellular delivery of many drugs, genes and proteins, which, therefore, might enhance their therapeutic efficacy and, in specific cases, overcome the multidrug resistance of many bacterial and tumor cells [1].

The intracellular delivery of active biomacromolecules from endosomes into the cytoplasm generally requires a membrane-disrupting agent. Since endosomes have a slightly acidic pH, pH sensitive compounds could be potentially useful for this purpose since they can destabilize membrane bilayers by pH-triggered conformational change. The main goal of this project is to the engineering of a biocompatible, nanometric system capable to effectively encapsulate and deliver DNA into the inner cell medium. The gelification properties of gelatin as well as the strong dependence of gelatin ionization with pH makes this compound an interesting candidate to be used to the effective intracellular delivery of active biomacromolecules [2]. In the present work, gelatin and protamine sulfate has been selected to form particles by interaction of oppositely charged compounds. Particles in the absence of DNA (binary system) and in the presence of DNA (ternary system) have been prepared. The physicochemical characterization (particle size, polydispersity index and degree of DNA entrapment) have been evaluated. It is also important to figure out which properties govern the interactions between these nanoparticles and cells. In vitro experiments have been performed in order to determine the cytoxicity of the isolated systems and the resulting particles.

Acknowledgements: M.C. Morán acknowledges the support of the MICINN (Ramon y Cajal contract RyC 2009-04683). This study was financially supported by Project MAT2012-38047-C02-01 from the Spanish Ministry of Science and Innovation. 1) A. K. Varkouhi et al., J. Control. Release, 151 (2011) 220. 2) A. O. Elzoghby, J. Control. Release, 172 (2013) 1075.

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56

Presenting Author: Stefano Perni Preferred Format: Oral E-mail: [email protected] Main Topic: Nanotechnology

Nanocarrier controlled delivery of antibiotics for acrylic bone cement applications

S. Perni, a,b P. Prokopovich a,b

a School of Pharmacy and Pharmaceutical Sciences, Cardiff University, CF10 3 NB, Cardiff, UK b Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

Bone cement is routinely used in orthopaedic applications and antibiotics are added in order to prevent infections offset.

Uneven distribution and uncontrolled release of the antibiotic are drawbacks associated with the mixing of such drug in the bone cement dough. Particularly, the antibiotic is released in the first weeks after implantation and, therefore, does not offer protection against infection that can occur months after the surgery. In order to control the antibiotic release and consequently extend the the actimicrobial activity, silica nanocarriers containing gentamicin have been prepared through various synthetic routes.

The carriers were synthesised using the Stöber protocol (hydrolysis of tetra ethyl silane in the presence of alcohol and alkaloids) and amino functionliased using (3-amino-propyl)triethoxysilane. The antibiotic has been conjugated both directly to amino functionalised particles (Suberic acid bis(N-hydroxysuccinimide ester) or to succinylated amino functionalised particles and through direct entrapment of gentamicin in the nanoparticles during synthesis; moreover adsorption on: amino functionalised, succinylated and un-functionalised has also been performed. The obtained particles have been characterised in terms of porosity (BET), antibiotic content (TGA) and surface charge (zeta potential); whilst gentamicin release from all prepared nanocarriers has been quantified as function of time and pH of solution using the ortho-phthalaldehyde assay. The direct entrapment provided the highest antibiotic load but the release was completed after 4 hours, whilst the adsorption on unfunctionalised silica particles returned the lowest amount of antibiotic load. For all other conjugated and adsorbed nanocarriers, gentamicin was released over a period of at least 2 days in all other cases without significant differences among the synthetic route and pH.

In order to extend the period over gentamicin is released, the antibiotic (naturally positively charged) has been deposited on the silica nanoparticles using the Layer-by-layer technique, sandwiching the drug between alginate layers. Using this approach the released has been sustained for at least a 1 week.

Once encapsulated in PMMA bone cement, the silica nanoparticles did not negativelly affect the citotoxicity and mechanical properties of the material.

Our results therefore, show that silica nanocarriers of antibiotics can be embedded in bone cement and extend the antimicrobial activity. Dependeng on the preparation route, the release can be controlled; for prolonged (many weeks), the coating of silica nanoparticles with antibiotic through LbL apper the most promessing technique.

57

Presenting Author: Nadica Abazović Preferred Format: Oral E-mail: [email protected] Main Topic: Materials

The influence of the solvent/surfactant composition on (Cd or Zn)In2S4 nanocrystalite formation

M. Carević, N. Abazović, M. Čomor

Laboratory for Radiation Chemistry and Physics, Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia

Ternary metal sulphides have narrow band gaps and strong absorption in visible spectral region. Beside their possible

application as photocatalysts in degradation processes of various pollutants, such properties recommend this class of materials for application in photoproduction of H2 from water and H2S (1). Two semiconductors from this II-III2-VI4 family that are especially interesting are CdIn2S4 (CIS) and ZnIn2S4 (ZIS). CIS has direct band gap of 2.2 eV (about 560nm) meaning that it has strong absorption in visible part of the spectra. Bulk ZIS has indirect band-gap, with reported values from 2.1 to 1.8 eV (590 to 690 nm) which makes it very suitable material for solar energy conversion.

Here we present colloidal synthesis of these two materials. The main idea was to find the proper solvent/surfactant composition and reaction conditions that will allow us to synthesize both semiconductors in colloidal regime. This synthetic procedure can be used for simultaneous manipulation with their size, surface and optical properties. Both semiconductors were synthesized in pure oleic acid and oleylamine/oleic acid media at 270°C. Morphology, structure and optical properties of obtained products were characterized.. It has been shown that it is not possible to synthesize ZIS under given synthesis conditions if only oleic acid is used. However, synthesis in mixture of oleylamine and oleic acid results in ZIS nanoparticles formation, while synthesis of CIS was accelerated. We hope that purity and crystallite size of CIS and ZIS can be predicted by oleic acid/oleylamine ratio in reaction media. Acknowledgments Financial support for this study was granted by the Ministry of Education and Science of the Republic of Serbia (Projects: III45020 and

OI172056). This work is supported by COST Action MP1106.

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62

Presenting Author: Piotr Warszynski Preferred Format: Oral E-mail: [email protected] Main Topic: surfactants

Adsorption of Cleavable Esterquad Surfactants and Polyelectrolytes at the Air/water Interface

G. Paraa, J. Łuczyńskib, J. Palusb, E. Jareka, K. A. Wilkb, P. Warszyńskia

aJ. Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland

bFaculty of Chemistry, Wrocław University of Technology, ul. Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

The search for environmentally-friendly surfactants (so called soft or ecologically – safe surfactants) and basic

understanding of their aggregation behavior at the interfaces are of current interest due to the emerging needs of forthcoming applications, such as new cosmetic formulations and drug delivery systems, engineering nanostructures or functional interfaces. The most well-known, and probably the most commercially viable example of soft surfactants comprises the family of cationic ester quat-type surfactants (abbreviated often as esterquats) with the ester bond inserted between the hydrocarbon tail(s) and the quaternary ammonium head group(s) via ester bonds R-CO-O- or ROC(O)-. Chemically and/or enzymatically induced cleavage of a bond at this location will cause the separation of the polar part and the hydrophobic tail and, as a consequence, loss of surface activity. This so-called primary degradation is often the first step in the biodegradation pathway. Thus, increasing the rate of this step often leads to an overall decrease in the time needed to reach ultimate biodegradation [1].

Interaction of oppositely charged surfactants and polyelectrolytes usually leads to formation of surfactant-polyelectrolyte complexes. Surface activity of such complexes depends on the relative concentration and properties of the surfactant/polyelectrolyte pair. Surface active complexes can be used to stabilize emulsions, further used as cores for encapsulation of hydrophobic components, while non-surface active can be utilized as carriers of hydrophilic compounds.

In the present work we consider both experimentally and theoretically adsorption of cationic esterquad surfactants, in the presence of anionic polyelectrolytes (poly(sodium-4-styrene sulfonate (PSS) and sodium alginate (ALG)). We studied derivatives having –O-CO- bond between quaternary amine and hydrophobic tail: N,N,N-trimethyl-2-(dodecanoyloxy)ethane-ammonium bromide (DMM-11) and N,N,N-trimethyl-2-(dodecanoyloxy)-1-methylethaneammonium bromide (DMP2M-11)), and derivatives with –CO-O- bond: dodecyloxycarbonyl-methyl-N,N,N-trimethyl ammonium bromide (DMGM-12)), and dodecyloxycarbonyl-1-ethyl-N,N,N-trimethylammonium bromide (DMALM-12)). These compounds are stable in the acidic conditions but in neutral and basic pH undergo hydrolysis resulting in either dodecanoic acid or dodecanol as surface active products. That influences the surfactant – polyelectrolyte interaction and as consequence the surface activity of their mixtures . The extended “surface quasi two-dimensional electrolyte” (STDE) model of ionic surfactant adsorption was applied for the description of hydrolysis influenced surface activity of surfactants and their mixtures with polyelectrolytes. We found that in case of PSS mixtures of DMGM-12 or DMALM-12 surfactants with polyanions exhibit synergistic effect on the surface tension, decreasing with time as the result of hydrolysis, while in the mixtures of DMM-11 or DMP2M-11 surface active complexes do not form. On the other hand addition of sodium alginate decreases the surface tension of all studied surfactants.

1) C. Overkempe, A. Annerling, C.G. van Ginkel, P.C. Thomas, D. Boltersdorf, J. Speelman, in: K. Holmberg (Ed.),

Novel Surfactants: Preparation, Applications, and Biodegradability, second ed., Dekker, New York, 2003,p. 347

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64

Presenting Author: Sándor Bárány Preferred Format: Oral E-mail: [email protected] Main Topic: Dispersed systems

Electrosurface Properties and Stability of Multi-walled Carbon Nanotubes with and without Laponite Platelets

S.Bárány,a M. Manilo,b N.Lebovkab

a MTA-ME Materials Science Research Group and Institute of Chemistry, University of Miskolc, Hungary, The Transcarpathian II. Ferenc Rakoczi Hungarian Institute, Beregovo, Ukraine

b F.D. Ovcharenko Institute of Biocolloidal Chemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine.

Carbon nanotubes (CNTs) are widely used due to their unique physical and chemical properties. During last years, different fields of CNT application were developed, such as synthesis of new selective biosensorы, carbon-based catalysts and adsorbents for waste water treatment. However, the ability of CNTs to disperse is rather poor and they show high tendency to aggregation in most solvents due to high hydrophobic character of the nanotubes surface. The stability of CNT suspensions can be enhanced by surface functionalization, or stabilization of particles by polymers, surfactants, or clay mineral particles. The potential of employing CNTs is associated with surface/electrosurface properties of nanotubes, i.e. their chemical nature and number of surface functional groups that determine wetting, surface charge density and electrokinetic potential, as well as aggregative stability of nanotubes. This study is devoted to characterization of the electric double layer of multi-walled CNTs in aqueous suspensions, as well as the effects of addition of Laponite clay disks on the zeta potential and stability of hybrid laponite+CNTs particles. Multiwall carbon nanotubes synthesized by CVD method in the presence of Fe-Mo-Al catalyst have been used. According to FTIR data, the CNT surface contained a small amount of hydroxyl and carbonyl groups. To characterize the electric double layer (EDL) of carbon nanotubes, the zeta-potential of CNTs samples as a function of pH and concentration of 1-1, 21-12 and 31-13 electrolytes was measured using Zeta Sizer NS (Malvern). It was shown that the electrokinetic behavior of CNTs essentially resembles the behavior of lyophobic colloids: the ζ (CKCl) curves reveal a maximum or plateau region, the addition of CaCl2 leads to a sharp decrease in the ζ-potential of nanotubes, while increase of the amount of trivalent counter-ions produces reversal of the surface charge. A correlation between sedimentation stability of CNTs suspension and zeta-potential of nanotubes was found. An increase in pH from 2 to 12 resulted in substantial rise of the absolute (negative) values of the zeta-potential of CNTs, from -5 mV to -47 mV. The stability of CNTs suspension with different mass ratios of Laponite and CNT (X) was investigated in a flow system using PDA-2000 Photometric Dispersion Analyzer (Rank Brothers Ltd, UK). The optimum ratio X (≥0.5), corresponding to the maximum stability of suspension, was found. It was also shown that an increase of X from 0 to 0.4 gives a monotonic drop in the negative zeta-potential (from -40 mV to - 32 mV), while zeta-potential of the nanotubes/Laponite complex was reaching its constant value. Acknowledgemets This study has been performed in the frame of the COST MP 1106 Action and using the support of the Hungarian Academy of Sciences-National Academy of Sciences of Ukraine cooperation agreement project.

65

Presenting Author: Anna Gyurova Preferred Format: Oral E-mail: [email protected] Main Topic: Dispersed systems Self-assembly of four- and two-antennary oligoglycines in the bulk of aqueous medium

Anna Y. Gyurovaa, Aneta Michnab, Elena Milevaa

a Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str.,bl. 11, Sofia 1113, Bulgaria

b Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences,Niezapominajek 8, 30-239 Krakow, Poland

For the first time systematic studies are performed on aqueous solutions of antennary oligoglycines. These synthetic substances have symmetric tails linked to a central carbon atom. They can self-assemble in aqueous solutions due to the onset of a highly cooperative system of intra- and intermolecular hydrogen bonds.

The current work presents the results from the study of the self-assembly of these compounds using the methods of Dynamic Light scattering and Electrophoresis. The size (hydrodynamic diameter) and the electric properties (electrophoretic mobility) of the aggregates are analyzed. One of the basic results is that the dominant fraction of the aggregates by number has hydrodynamic diameters in the range 50-100 nm.

Fig. 1 Size distribution by number for four-antennary oligoglycine at concentration 5x10-4 mol/l. The samples are analyzed for 24 hours at a temperature of 20oC.

To the best of authors’ knowledge, this is the first time that direct experimental evidences for the presence of

oligoglycine assemblies were revealed in the bulk of aqueous solutions.

Acknowledgements The experimental investigation is performed as STSM: COST-STSM-MP1106-18973

(Dr. Anna Gyurova in Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences) funded by COST Action MP 1106 “Smart and green interfaces - from single bubbles and drops to industrial, environmental and biomedical applications”. We are grateful to Prof. Kazimierz Malysa and Prof. Zbigniew Adamczyk for the fruitful discusions

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69

P-2 Presenting Author: Janusz Nowicki Preferred Format: Poster E-mail: [email protected] Main Topic: Interface related phenomena

Amphiphilic ionic liquids - catalysts and surfactants in biphasic reaction systems

J.Nowicki,a J. Łuczak,b D. Stańczyka

aDepartment of Renevable Raw Materials Processing, Institute of Heavy Organic Synthesis “Blachownia”, Kędzierzyn-Koźle, Energetyków 9, PL-47225 Kędzierzyn-Koźle, Poland

bGdansk University of Technology, Chemical Faculty, Department of Chemical Technology, G. Narutowicza 11/12 , PL-80233 Gdańsk, Poland

Most of ionic liquids (ILs) is characterized by relatively strong ionic asymmetry and exhibits the characteristics of amphiphilic compounds with specific hydrophilic and lipophilic centers. Studies on the surfactant properties of ionic liquids in aqueous solutions have been developed intensively for many years, and revealed that by changing of the alkyl chain length, headgroup type, as well as counterions nature, aggregation behavior of the ionic liquids can be modified. Ionic liquids, especially imidazolium ones, cannot be considered only as common cationic surfactants. The structure of the cation is far more complex than conventional quaternary ammonium salts, mainly due to the ability of imidazolium cation to form hydrogen bonds. In broad they can be considered as ammonium salts. One of the properties of ammonium salts is their application mainly in the interfacial phase transfer catalysis (PTC). Selected ionic liquids also can be applied as PTC catalysts [1-3], however in contrast to the "classical" PTC catalysts, ionic liquids may be subjected to targeted modification (TSIL). TSIL may play a dual role: catalyst (co-catalyst) and the surfactant, which has a significant impact on the efficiency of the catalyst. In this study, the 1-alkyl-3-methylimidazolium hydrogen sulfate homologous series (C6-C12) ionic liquids were used as a phase transfer (co-)catalyst and surface active agent in the oxirane ring opening reaction. This reaction is carried out in biphasic conditions and required acidic catalysts. Oxirane ring opening of fatty acid derivatives (eg. FAME) in the presence of water as oppening reactant is a good model reaction for evaluation of dual functionality of amphiphilic IL.

We aim to understand the effect of the IL’s structure on the surface activity and the ability to form well-develped interface and

therefore influence the efficiency of this acid-catalysed phase transfer reaction. All of the synthesized ionic liquids were shown to decrease surface tension and self-assemble in aqueous solutions forming micelles

as it was determined by conductivity, surface tension and calorimetric measurements. Increasing the hydrophobic domain of the IL’s cation favors micelle formation as it has been shown for the conventional surfactants. Surface tension of micellar solutions were found to be in a range of 32-35 mN/m with the CMC values being lower than corresponding halogenes.

The ability to modify the cation structure and in consequence, to alter IL’s physicochemical properties have also a large impact on the effectiveness and selectivity of the oxirane ring opening. As shown in Figure 1 hydrogensulfate amphiphilic ionic liquids may exert synergistic effect on acid catalyzed oxirane ring opening reaction. Co-catalytic efficiency expressly increases as shortening the length of the alkyl chains of imidazolium ionic liquid, which is related to the effect of the their surfactant factor. The present study confirms the existence of a strong relationship among ILs structure, surface activity and ability to catalyze in sudied reaction.

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[1] Lourenc N.M.T., Afonso C.A.M., Tetrahedron, 2003, 59, 789–794 [2] Shinde S.S., Chi H.M., Lee B.S., Chi D.Y., Tetrahedron Lett., 2009, 50, 6654–6657 [3] Xu L.W., Gao Y., Yin J.J., Li L. Xia C.G., Tetrahedron Lett., 2005, 46, 5317–5320.

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he models prend under specifn local turbulethe local mean

rd flow. This fg the total flowozzles). Bubblrs from Matinein the recordede local dissipat

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number of daugIV and validati

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dissipation rate

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nto smaller strates that re superior

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The pbubble on timbouncing of aiwere monitorevariations of tbetween the buca. 25 to ca. consequence odeformation dewith the bubblbubble sizes srelated to decGenerally, theincrease of thdeformation offilm does not rhigher bubblecorrectness of visualize in exmoment of col

Thus, the incretime to drain ttimes prior to t

Author: Jan Zawala@cyf-kr

uence of an

Jerzy Haber

ome of the risinning liquid filmand the liquid led critical thicquid surface, dcontaminationface. Howeverr opinion, the dmenon. paper presents

me-scale of its ir bubbles of red using high-he bubble veloubble first coll80 ms. when

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Zawala r.edu.pl

n air bubbl

J. Z

r Institute of Cat

ng bubble collim, separating th

film formed isckness of ruptudepending on ns, the drainager, even in suchdeformation of

results of experupture (coaleadius 0.50 - 0.-speed video rocity and shaplision to the mn the bubble ber of the bubreasing with thlower impact vr opinion, prolus of the intercing is a conseergy of the sy

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pe deformationoment of its rudiameter was bble approach

he subsequent cvelocity of eaclongation of thrvening liquid

equence of comystem, (due tohe expense of krupture beforesimultaneouslyed be means ofmerically in sie obtained exp

bubble at the m

ble bouncing ipture. This is terface.

velocity onments and

Niecikowska

ace Chemistry PA

id/air interfaceurfaces. Duringe bubble ruptuthe collision plocity and thefilm is very fait is possible t

hape, directly re

ing importanceater/air interfacct velocity withe movies recns. Moreover, supture, was det

changed fromh-bounce cyclecollision numbech consecutivehe bubble coa

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y, larger radiuf numerical simimulations. Fig

perimentally an

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a, K. Malysa

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e of impact vece. The phenothin the range

corded were anso-called coaletermined. It w

m 0.50 to 0.8es prior to theer, due to dissi

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is lower for wo processes (

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us of the liquimulations. Theg. 1 presents cnd numerically

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PrefeMain Topic:

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a

minajek 8, Krako

nly on kinetics e bubble/liquidid/air interface

wise, the bubble. For clean wa

d timescale), duite spectacular ollision impact

locity (kinetic omena occurrin

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88mm, respecte rupture. Simipation of the kffect was obse

e with the bubsmaller bubbl

(i) thinning of ea – bubble sounces apart oimpact velocityid film forme

e shape of the licomparison of for Rb = 0.74

ion with water/

t that film of lang higher kinet

ferred Format Bubble & d

water/air in

kow, PL

of drainage and and liquid/air e when the drae rebounds or iater system, frue to full mobibubble bouncet velocity, is re

energy) of theng during colli

m/s) at air/watere-by-frame to tc), i.e. the timthe tc values vatively. Longer

multaneously, thkinetic energy erved for all rabble diameter vle deformation

f the liquid filmshape deformanly if the thinny (kinetic energed. Additional iquid film, imp

f the bubble shmm.

/air interface

arger radius netic energy boun

71

t: Poster drop flow

nterface

nd stability interfaces

aining film is captured ree of any ility of the es prior to esponsible

e colliding isions and r interface determine

me interval aried from r tc was a he bubble associated

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P-5 Presenting AE-mail: nckr

Bub

Describiotechnology adescribing motioactive agents gesurface. Thus, ththis qualitative, time of the bubb

When an energetic barcompared with surfactant adsorp

The aelectrolytes (KFsurfactants (CTAconcentrations v

Bubbland at high conc15 cm/s, respecbubble deceleradiminishing with

It waspassed through immobilized suraddition of highof counterions. Tlayer in the pres

Fig. 1. Rising b

AcknowledgemFinancial supporbeen also suppo


bble motion

J. Haber Institu

iption of the mand chemical enon of the bubbleenerate the so cahe air bubble motheoretical mod

ble growth on themolecules of th

rrier of electrostatheir nonionic

ption due to the aim of our workF, KCl, NaCl, KABr, SHS). The

varied from 1x10le local velocitiecentration of ionctively). In the cated and a plateh increasing surfs found that addthe maximum arface. The widter concentrationThe effect followence of high exc

bubbles in cation

ments: rt from Polish Nrted by COST ac

cel Krzan edu.pl

n in ionic s

M.

ute of Catalysis a

motion of bubblngineering. Duees with high Reyalled Marangonoves as if its surel does not accoe capillary, or itse ionic surfactanatic origin for fuanalogues withEDL compressi

k was the determKBr and KClO4)e surfactants co0-4M to 5x10-1Mes showed differnic surfactants thcase of low surfeau value of thfactant concentradition of inorganand it reached teh of the maxim

n of inorganic elew the Hofmeistecess of counterio

nic and anionic su

National Scientifictions MP1106 a

surfactantsele

. Krzan, E. J

and Surface Chem

es is a fundame to the compleynolds number ini effect that lead

rface were stagnount for many ads initial velocitynt are adsorbed aurther surfactant h the same lengon. mination of the on local and tencentrations stu

M. rent profiles depe local velocitiefactant concentrhe terminal veloation. nic electrolyte inerminal value, w

mum of the locaectrolyte caused er series of ion aons of increasing

urfactants solutio

fic Centre (grant and CM1101.

solutions ectrolytes

Jarek , P. W

mistry PAS, Niez

mental problem ex nature of bun surfactant soluds to the retardaant, and its rise

dditional factors . at solution/gas inadsorption. Tha

gth of a hydroc

influence of coerminal velocitieudied were in th

pending on concs were increasinrations a velocitocity was attain

nto solutions strwhich for the eleal velocity profil

reverse effect, tactivity. It may bg “hydrophobicit

ons. The influen

no. 2011/01/ST

– influenc

Warszynski

zapominajek 8 s

for a wide ranubble motion theutions. It is geneation of bubble speed is deceleraffecting bubble

nterface, the elecat results in lowecarbon chain. A

oncentration anes of bubbles inhe range from 1

centration of theng steadily till rety maximum waned. Height, wi

rongly affected ectrolyte concenle decreased withe broadening obe connected wity”.

nce of various in

8/03717) is grat

PrefeMain Topic:

ce of variou

str. 30-239 Crac

nge of applicatioere still doesn’terally accepted tinterfacial circu

rated. However, e motion, like li

ctrical double layer surface activit

Addition of elec

d type of countn various solutio1x10-7M to 2x10

e ionic surfactaneaching a steady as achieved afteidth and positio

the bubble motntration above 1ith electrolyte cof the maximumith the different

norganic electroly

tefully acknowle

erred Format:: Bubble & dr

us inorgani

cow, Poland

on from froth ft exist any genthat the presenceulation and so rit must be poin

quid viscosity, b

yer (EDL) is buity of ionic surfactrolyte increase

terions added aons of anionic a0-4M, while the

nt solutions. In cstate velocity (3

er initial acceleron of the maxi

tion. Bubble loc10-3 M corresponconcentration. Su, which dependestructure of the

yte cencentration

edged. Part of th

72

: Poster rop flow

ic

flotation to neral theory e of surface igidifies its ted out that bubble size,

ilt, bringing ctants when s the ionic

s inorganic and cationic

electrolyte

clean water 35 cm/s and ration, next imum were

cal velocity nded to the urprisingly, ed on a type e adsorption

ns.

is work has

73

P-6 Presenting Author: Ourania Oikonomidou Preferred Format: Poster E-mail: [email protected] Main Topic: Bubble & drop flow

Assessment of parameters affecting ‘flow’ decompression degassing

O. Oikonomidou,a S. Evgenidis,a M. Kostogloua, T. D. Karapantsiosa

a Department of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, P.O. Box 54124, Thessaloniki, Greece Decompression degassing of a flowing liquid volume supersaturated with a gas is the working principle of Dissolved

Air Flotation (DAF), a very well-known wastewater treatment process utilized for the removal of suspended solid micro-particles from water volumes. Micro-bubbles generated during “flow” decompression degassing adhere to flocs, lower their density thereby making their flotation and removal procedure a feasible task. Efficiency of DAF process is strongly correlated to the size of generated bubbles, thus in literature there are numerous scientific studies conducted as an attempt to optimize the process obtaining smaller bubbles, by investigating the effect of several parameters on bubble growth during “flow” decompression degassing. [1-4] Results are gathered, categorized and critically reviewed, providing sufficient guidance for additional research.

According to literature, scientific interest focuses more on final bubble sizes obtained during DAF rather than on the evolution of bubble sizes from their nucleation until ascension to water free surface. Consequently, supplementary experiments need to be conducted in order to gain evident knowledge on how the dynamic behavior of bubble growth during “flow” decompression degassing is affected by several experimental parameters such as gravity, liquid supersaturation level, liquid flow rate, surfactants addition, gas solubility, and nozzle geometry.

In this respect, an experimental apparatus appropriate for executing such dynamic “flow” decompression degassing experiments, under both terrestrial and hypergravity conditions (Large Diameter Centrifuge, ESA ESTEC), is under development for the needs of ESA NPI Project (No:279-2013) “Bubble dynamics during degassing of liquids”. Bubble size, velocity and trajectory will be measured optically at different vertical locations above the point of discharge by means of a high resolution digital camera and a high speed video camera. Monitoring bubbles at different heights enables bubble size – time correlation, thus permitting dynamic study of bubble growth. Volumetric gas fraction will be measured utilizing a highly sensitive electrical impedance technique developed in our lab. As “flow” decompression degassing phenomenon takes place also in the human body of astronauts and scuba divers due to ambient pressure decrease causing Decompression Sickness (DCS), [5] tap water and human blood simulant will be the two test liquids to examine. As for the gas phase, gases of different solubilities in aqueous solutions such as air, CO2 and N2 will be utilized.

1) T. Takahashi et al., J. Chem. Eng.of Jap, 12 (1979) 275. 2) S. De RijK et al., Wat. Res, 28 (1994) 465. 3) M. Ponasse et al., Wat. Res, 32 (1998) 2498. 4) R. Rodrigues et al., Min. Eng, 16 (2003) 757. 5) V. Papadopoulou et al., Adv. in Coll. and Int. Sc, 191 (2013) 22.

74

P-7 Presenting Author: Michele Ferrari Preferred Format: Poster E-mail: [email protected] Main Topic: Interfaces in bioscience and biotechnology

Superhydrophobic coatings for biofouling control by in shallow euphotic seawater

M.Ferrari, A. Benedetti, E. Santini, F. Ravera, L.Liggieri, F.Cirisano

CNR- Inst. for Energetics and Interphases Via De Marini, 6 Genova – Italy

Marine biofouling is a biological phenomenon of accumulation and development on an interface of a complex multi-specific biological community: bacteria, algae, fungi and ultimately higher organisms. These formations cause severe problems in particular for the naval industry due to the deterioration of the surfaces, increased roughness which leads to an increase fuel consumption and, as a final result, increased material corrosion. Highly water repellent coatings known as superhydrophobic (SH) are related to surfaces with contact angles above 150° and a very small hysteresis. Among many practical needs to which this property can be devoted, a very interesting field where the SH coating technology can be employed is represented by the protection of hulls in seawater environments from the biofouling colonization. More sustainable materials in the final product and in the preparation stage hold to preferable bio-compatible coatings, basing the action on low surface energy exerting physical prevention of bioadhesion of colonizing organisms. In this work we report on field tests of a superhydrophobic ‘green’ coating on aluminum and glass substrates in real seawater mesocosms conditioned/not conditioned by the natural photoperiod and the photobiology development. In particular performance, durability and fouling removability of the here tested SH coating is evaluated with immersions focusing on different time scales.

. 1) M Ferrari.et al. Surfactants and wetting at superhydrophobic surfaces: Water solutions and non aqueous liquids. In: Advances in Colloid and Interface Science, vol. 161 (1-2) pp. 22 - 28. Physico-chemical and flow behaviour of droplet based systems. V.M. Starov, R. Miller, S. Guido (eds.).Elsevier B.V,2010. 2) M.Ferrari, et al., Biofouling control by superhydrophobic surfaces in shallow euphotic seawater, Colloids Surf. A: Physicochem. Eng. Aspects (2014) doi:10.1016/j.colsurfa.2014.11.009 3) M.Ferrari, et al Superhydrophobic surfaces for seawater applications Advances Colloid Interface Science in press 2015

75

P-8 Presenting Author: Flora Ascione Preferred Format: Poster E-mail: [email protected] Main Topic: Interfaces in bioscience and biotechnology

From Droplets to Cells: Dynamic Evolution of Active Interfaces

F. Ascione,a S. Caserta,a S. Guido a

aDipartimento di Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI), Università di Napoli Federico II, P. Tecchio 80, 80125 Napoli, Italy

A wide range of physiological and pathological processes, including angiogenesis, inflammation, tissue repair, tumor

growth and invasion, are strongly linked to cell proliferation and migration mechanisms that govern the dynamic evolution of cell systems, defined as active bio-soft matter. These mechanisms, driving the dynamic behavior of both individual cells and cell aggregates, can be experimentally investigated in vitro by using several assays, such as chemotaxis, wound healing or scratch assays, coupled with Time Lapse Microscopy (TLM), that allows direct visualization of biological systems during their dynamic evolution. This microscopy technique is based on iterative image acquisition of selected regions within the sample by means of a motorized video-microscope, while controlling the environmental parameter to ensure cell viability throughout the experiment, which can last from a few minutes, up to a few weeks. [1] The application of image analysis techniques allows the calculation of the relevant cell dynamics parameters, such as the proliferation time and cell diffusivity.

The experimental data can be interpreted according to mathematical models based on a transport phenomena approach, typically used to describe the dynamic behavior of complex fluids, like emulsions or foams.

For example, the fusion of two contiguous cell aggregates may be described in terms of an effective interfacial tension that promotes the formation of clusters with minimum external surface, in analogy with the coalescence of droplets. This analogy allows to describe analytically the dynamics of the fusion process by employing conservation of mass and energy as proposed for the coalescence of highly viscous drops. [2] After aggregation, the fusing clusters are observed to evolve toward a spherical shape, the process can be interpreted in terms of an equivalent interfacial tension. The characteristic time for cluster retraction can be seen as the equivalent of the emulsion time for the case of a retracting droplet.

Another analogy is found in wound closure phenomena in vitro, when two cell sheets move one toward the other to fill an empty space, the cell front does not move compact and uniform, but corrugates because of an interfacial instability, in analogy with the instability at the interface occurring between two fluids.

Our work is addressed to interpret cell dynamic behavior by using an effective interfacial tension based on the analogy with liquid-liquid immiscible systems. 1) F. Ascione et al., Chem. Eng. Trans., 38 (2014) 517. 2) S. Douezan et al., Soft Matter, 8 (2012) 784.

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P-11 Presenting Author: Stefano Guido Preferred Format: Poster E-mail: [email protected] Main Topic: Microfluids

Surfactant Multilamellar Vesicles in Flow

A. Pommella,a D. Donnarumma,a S. Casertaa, S. Guidoa


Surfactant systems morphology is a topic of high scientific interest that has various industrial applications. However, while many studies have been addressed to the phase behaviour of watersurfactants solutions, only limited information is available in literature on flow-induced morphology of such systems. In aqueous solution, due to their amphiphilic nature, surfactants molecules self-assemble into a range of well-defined structures depending on temperature, concentration and their chemical nature. These structures range from micellar solutions to multilamellar phases. In wide concentration ranges multilamellar domains, suspended in an aqueous phase, can fold rearranging in an almost spherical multilamellar structure consisting of onion-like stacked bilayers separated by solvent, known as surfactant MLVs.

The recent advances in rheo-optical techniques help now to elucidate the changes in microstructural conformation taking place in the lamellar phase during flow. The focus of this work is to develop a quantitative investigation of the flow behaviour of single surfactant multilamellar vesicles (SMLVs). The fluid investigated is a solution of HLAS in water, a surfactant widely used in the detergent industry. Depending on concentration, different phases can be observed, such as planar lamellae, unilamerllar and multilamellar vesicles. We focused on a range of concentration where lamellar phase inclusions are surrounded by an isotropic matrix, and eventually form SMLVs. Vesicle shape has been quantified by image analysis techniques. Different setups allow the direct observation of the sample, either during the flow or in static conditions, by several microscopy imaging techniques including high speed, bright field, phase contrast and confocal. A simple shear flow cell, where the fluid is placed among two parallel transparent glass plates one of which is translating respect to the other, allow the sample observation both along the vorticity and velocity gradient directions, using two different setups, hence allowing the three-dimensional reconstruction of the system microstructure. A different flow cell can be used to investigate the Poiseuille flow using a cylindrical microcapillary (Fig. 1). SMLV deformation shows some analogies with the behaviour of a single droplet immersed in an immiscible fluid, thus suggesting possible non-dimensional scaling parameters such as the Capillary number, that is the ratio between the shear and the interfacial stress. Furthermore, 3D shape reconstruction of confocal images of SMLVs, was used to identify the presence of both superficial and internal defect, whose role in the deformation dynamics is discussed.

1) A. Pommella et al., PRL., 108 (2012) 138301. . 2) A. Pommella et al., Soft Matter, 9 (2013) 7545. 3) D. Donnarumma et al., Coll. Surf. A, (2015) in press.

79

P-12 Presenting Author: Denis Weaire Preferred Format: Poster E-mail: [email protected] Main Topic: Foams and Emulsions

Fibres in Foams

D. Weairea, F.F. Dunne,a D. Whytea, M.E. Möbiusa, T. Hjeltb, and S. Hutzlera

aSchool of Physics, Trinity College Dublin, Ireland

b VTT Technical Research Centre of Finland, Finland, P.O. Box 1000, FI-02044 VTT, Finland

The manufacture of paper (together with cards, insulating boards etc.) is one of the world's biggest industries. Paper is still made by essentially traditional methods, massively scaled up and automated. The introduction of foam rather than water as the dispersing medium for wood fibres offers an increased efficiency in this process [1,2], and an additional factor that can control the porosity etc. of the end-product. We are engaged in a preliminary study of the nature and properties of a fibre-filled foam, a new dimension in foam physics. This includes drainage (an important part of the process), the properties of the end product, and their dependence on bubble size. This work will extend to the incorporation of peat fibres to make low-density insulation materials [3].

1) J.P. Hanson, What's going on in non-wovens, Pulp & Paper, October, 97-102 (1977) 2) J. Lehmonen, P. Jetsu, K. Kinnunen and T. Hjelt, Potential of foam-laid forming technology in paper applications, Nordic Pulp and

Paper Research Journal, 28, 392-398 (2013). 3) K. Immonen, K. Kinnunen, J. Lehmonen, T. Hjelt, A. Erkkilä, Peat moss structures Google Patents,

http://www.google.com/patents/WO2013144449A1?cl=en, (2013)

Acknowledgement: Research supported by a research grant from Science Foundation Ireland (SFI) under Grant number 13/IA/1926.

80

P-13 Presenting Author: Margaritis Kostoglou Preferred Format: Poster E-mail: [email protected] Main Topic: Foams and Emulsions

Inverse population balance treatment of bubble size evolution in free draining foams

M. Kostoglou, J. Lioumbas, T.D. Karapantsios

School of Chemistry, Aristotle University of Thessaloniki, Greece Modeling foam drainage is an important step in understanding foam stability properties. There is a two way coupling

between foam drainage dynamics and bubble size evolution. The bubble size evolution is determined in the general case by two processes: ripening and coalescence. The ripening problem modeling is relatively easy and it has been extensively studied. The coalescence problem is very complex and its modeling attempts are limited. The most sophisticated studies are based on the statistics of bubble films leading to the evolution of the average bubble size. Here an alternative approach to indirect modeling of the coalescence process is attempted. Experimental results of the evolution of bubble size distribution in free draining foams are registered. Then the so called inverse population balance approach is invoked to estimate the coalescence and ripening rates leading to the experimental bubble size evolution. Several surfactant concentrations are employed to yield foams of varying stability. It is shown that the experimental bubble size distributions can be adequately described in all cases by a log-normal distribution. This simplifies vastly the inverse problem solution since approximate methods can now be used for the solution of the population balance equation.

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81

P-14 Presenting Author: Thodoris Karapantsios Preferred Format: Poster E-mail: [email protected] Main Topic: Foams and Emulsions

Optimization of viscosity and foaming of a dishwashing detergent. Efficient substitution of coconut diethanolamide to produce a safer product for human

health.

Christos G. Koukiotis,a,b George Lamprinos,a Thodoris D. Karapantsios b

aDepartment of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece bLOUFAKIS CHEMICALS SA, Industrial Area of Thessaloniki,Thessaloniki, Greece

The basic intent of this study was to optimize a dishwashing detergent recipe provided by a local detergent company for

maximum foaming properties and to address viscosity and storage stability issues. We study the influence of salt concentration to the viscosity of the initial detergent recipe (fig. 1) and we found that all the changes in viscosity and stability are in agreement with literature and are explained by changes in the structure of the micelles of surfactants in the detergent [1-6]. The surfactants of the basic recipe in the order from high to low percentage in the recipe were: sodium & triethanolamine salts of Linear Alkylbenzene Sulfonate (LABS-Na, LABS-TEA), sodium salt of lauryl ether sulfate (SLES), coconut diethanolamide and cocamidopropyl betaine. Foaming of solutions of the detergents in tap water alone and in the presence of fatty soil was measured with a warring blender and a measuring cylinder [7]. It was found that the foaming properties of the detergent were drastically improved by replacing most of the LABS-Na with SLES. Further small improvement was achieved by a small increase of the CocoDEA in the recipes rich in SLES.

Finally we substitute all the coconut diethanolamide of the optimized recipe with Coco Amido propyl amine oxide (CAPAO) and we found that the performance of foaming of the detergents in tap water alone and in the presence of fatty soil was the same. This change gives a safer product for human health as we found in literature that there are a few evidences of carcinogenic activity of coconut diethanolamide in mices [8]. Fowler also found that coconut diethanolamide may cause allergic contact dermatitis to some people [9].

Fig. 1 Ifluence of NaCl concetration on the viscosity of the dishwashing detergent.

References [1] Sein, A. & Engberts, J. B., 1993. Langmuir, Vol 9, pp. 1714-1720 [2] Van der Pas, J. C., Van der Linden, E., Engberts, J. B. & Sein, A., 1993. Langmuir, Vol 9, pp. 1714-1720.

[3] Sykes, B. M. & Menger, F. M., 1998. Langmuir, Issue 14, pp. 4131-4137 [4] Yang, J., 2002. Current Opinion in Colloid & Interface Science, November, pp. 276-281 [5] Penfield, K., 2005. International journal of cosmetic science, 27(5), p. 300. [6] Wasilewski, T. & Bujak, T., 2014. Ind. Eng. Chem. Res., 53(34), p. 13356–13361. [7] Klein, K., 2004. Evaluating shampoo foam. Cosmetics and toiletries, 119(10), pp. 32-35

[8] U.S. Department of Health and Human Services 2001. Toxicology and carcinogenesis studies of coconut oil acid diethanolamine condensate, P.O. Box 12233: NIH PUBLICATION No. 01-3969.

[9] Fowler JFJ (1998) Allergy to cocamide DEA. American Journal of Contact Dermatitis 9(1): 40-1 Acknowledgements:

Financial support by the European Space Agency through the project FASES (Fundamental and Applied Studies of Emulsion Stability) is gratefully acknowledged.

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83

P-16 Presenting Author: Jaroslav Katona Preferred Format: Poster E-mail: [email protected] Main Topic: Foams and Emulsions

Investigation on emulsifying properties of pumpkin (Cucurbita pepo) seed protein isolate and hydrolysate

J. Katona, S. Njaradi, Lj. Popović, Ž. Vaštag, L. Petrović, J. Milanović1

Faculty of Technology, University of Novi Sad, Novi Sad, Serbia

Pumpkin (Cucurbita sp.) seeds are rich in proteins, with protein content ranging from 24–38% wt. During oil extraction by cold pressing process an oil cake is obtained as a byproduct of the process. Protein content in the oil cake is as high as 63.5% wt., and as such is a rich source of vegetable proteins. In this work, investigation on emulsifying properties of pumpkin (Cucurbita pepo) seed protein isolate (PSPI) and its hydrolysate (PSPH) was carried out. Firstly, influence of pH (3–8) and ionic strength (0–1M NaCl) on solubility, and adsorption at air–water and oil–water interface of PSPI and PSPH was investigated. Solubility of PSPI was lowest at pI=5, and highest at pH=8, whereas changes in pH only slightly influenced solubility of PSPH. Both salting–in and salting–out of PSPI were observed, which depends on pH of a solution. Ionic strength has little effect on solubility of PSPH. PSPI and PSPH decrease surface/interfacial tension of solutions. Secondly, 20% wt. emulsions of sunflower oil in a water solution of PSPI and PSPH at different pH and ionic strength were prepared by Ultraturrax T–25 at 10000 rpm. Emulsions were characterized by mean diameter and creaming stability. The most stable emulsions with lowest mean diameter d43=37μm were obtained when emulsifying sunflower oil in 1% wt. PSPI solution at pH=3 and 0M ionic strength. No significant differences in emulsifying properties between PSPI and PSPH were observed.

Acknowledgements: This work was financed by Ministry of Education, Science, and Technological Development of Republic of Serbia, Grant No. III 46010. It is done within COST CM1101 and MP1106 actions framework.

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85

P-18 Presenting Author: Libero Liggieri Preferred Format: Poster E-mail: [email protected] Main Topic:Bubble & drop Interfaces

Dynamics of adsorption layers from the FASTER (Facility for Adsorption and Surface Tension) experiment onboard the International Space Station

L. Liggieri,a M. Ferrari,a G. Loglio,a P. Pandolfini,a F. Ravera,a D. Zabiegaj,a R. Miller,b

M. Karbashi,b A. Javadi,b J. Krägel,b V. Kovalchukb

aCNR – Institute for Energetics and Interphases – Genova (Italy) bMax-Planck Inst. For Colloids and Interfaces – Golm/Potsdam (Germany)

FASTER is an instrument containing two Capillary Pressure Tensiometers developed by the European Space Agency and utilised recently to perform experiments about the dynamics and dilational rheology of adsorption layers at liquid interfaces onboard the International Space Station (ISS).

The weightlessness environment available on the ISS provide in fact a unique opportunity to investigate the processes involved into the above dynamic properties under purely diffusive transport conditions. It is therefore possible to use the data measured during those experiments to test in detail different physical assumptions and models concerned with the dynamics of adsorption layers.

In addition the weightessness conditions extends the applicability of Capillary Pressure Tensiometry to dynamic ranges not accessible under laboratory conditions. This is for example the case of the measurement of the interfacial (liquid-liquid) dilational viscoelasticity in the frequency range of area perturbations above few Hz, which is at present problematic on ground for every of the available methods.

Here the principles of the experiment are presented together to some results of the 2014 ISS-FASTER campaign and of similar campaigns executed previously onboard the NASA Space Shuttles.

Acknowledgements: European Space Agency, Projects "MAP AO-99-052, Fundamental and Applied Studies of Emulsion Stability

(FASES)” and “AO-2009-813, PArticle STAbilised Emulsions and Foams (PASTA)” and related projects of the Italian Space Agency, (Contract No.ASI/I-001/11/0 and contract No. 2013-028-R.0).

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89

P-22 Presenting Author: Jaroslav Tihon Preferred Format: Poster E-mail: [email protected] Main Topic: Diagnostics & Applications

Electrodiffusion Method of Near-Wall Flow Diagnostics in Microfluidic Systems

J.Tihon , V.Penkavova, P.Stanovsky, J.Vejrazka

Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, Rozvojová 135, 16502 Prague 6, Czech Republic (e-mail: [email protected] ).

The electrodiffusion technique[1] has been mostly used for the near-wall flow diagnostics on large scales. A novel technique for fabrication of plastic microfluidic systems with integrated metal microelectrodes (called technique of sacrificed substrate [2] enables us to produce microfluidic devices with precisely shaped sensors for wall shear stress measurements. Several micrometer thick gold sensors built-in into a plastic substrate exhibit good mechanical resistance and smoothness. They can be used for flow investigation in various microfluidic systems (e.g. in complex channel geometries often used as micromixers, in multiphase microfluidic systems dealing with bubbles and drops.)

Proper functioning of prepared microsensors has been first tested in calibration experiments. A chip with an array of 20 gold sensors (160 microns strips separated by 40 microns insulating gaps) serves as a top cover (roof wall) of a microchannel (800 microns in depth). Water with a small addition equimolar potassium ferrocyanide and ferricyanide has been used as a suitable electrochemical system for the electrodiffusion measurements. The polarization curve with a distinct limiting diffusion current plateau, the cubic root dependence between the measured limiting current and applied wall shear stress, and the transient current response following the Cottrell asymptote have been observed. The calibration experiments with well controlled temperature have been carried out to reveal that the diffusion coefficient of active ions is strongly dependent on temperature and the measured data can be fitted by an exponential relationship similar to the Arrhenius equation.

After calibration measurements, the chip with microsensors has been applied in two experiments. First, it has been mounted into a microchannel provided by a step change in its height from 400 (inlet section) to 800 microns (outlet section). The axial profiles of wall shear stresses have been measured for different Re values. The different flow-recirculation zones have been identified downstream the step and high magnitudes of near-wall flow fluctuations observed at reattachment regions. The characteristic frequencies of these pulsations have been provided. Second, the wall shear stress corresponding to the translation of a single air bubble by water flow in a microchannel has been investigated. The typical trace of wall shear stress induced by the bubble movement has been revealed.

Fig. 1 Response of electrodiffusion signals to a rising bubble (channel H=0.8 mm, UB=0.042 m/s VB=60 l,): (a) currents from two sensors, (b) wall shear rate calculated from the primary current signal..

1) T.J. Hanratty, J.A. Campbell, Fluid mechanics measurements (Washington, Hemisphere, 1983). 2) W. Schrott, M. Svoboda, Z. Slouka, D. Snita, Microelectron Eng, 86 (2009) 1340. This work was supported by the Ministry of Education, Youth and Sports of the Czech Republic (Project No. LD 13018).

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P-25 Presenting Author: Gunars Bajars Preferred Format: Poster E-mail: [email protected] Main topic: Materials

Structure, optical and photocatalytic properties of TiO2-WO3 composite films prepared by electrophoretic deposition

M. Rublansa,b, G. Bajarsa, I. Liepinaa, A. J. Gabrusenoksa, Lusisa, E. Pentjussa

aInstitute of Solid State Physics, University of Latvia, Kengaraga street 8, Riga, LV-1063, Latvia bFaculty of Physics and Mathematics, University of Latvia, Zellu street 8, Riga, LV -1002, Latvia

Owing to its photocatalytic capability, low cost and chemically inert properties, TiO2 is a promising material for water and air contamination treatment technologies [1]. Many investigations have been devoted to the pure TiO2 films because of its reusability. Nonetheless, practical application of such films is limited by recombination of photo-induced hole-electron pairs. Coupling TiO2 with inorganic oxides such as SiO2, SnO2, WO3, In2O3, can increase the energy range of photo-excitation and this will change the photocatalytic efficiency [2].

Electrophoretic deposition (EPD) has been widely applied to obtain pure TiO2 thin films as well as doped TiO2 thin films with transition elements. Advantages of EPD over other coating methods are the homogeneity of thin films, as well as better control of particle size and shape [3, 4].

In this work bi-component WO3 is used as a photo-electron storing material. TiO2-WO3 coatings were prepared by electrophoretic deposition 5 to 20 min on 3x3 cm steel substrates using electric field intensity ranges from 50 to 100 V/cm. Dispersion medium was prepared from either hydrochloric or benzoic acid solution in isopropanol where the metal oxides were added. Deposited films were heated at 60 oC for 2 h and then annealed at 500 oC for 2 h.

The phases and crystalline sizes of obtained TiO2 thin films were determinate by X-ray diffraction. X-ray fluorescence was used to establish WO3 content in thin films. Surface morphologies were analyzed by scanning electron microscopy. Optical properties (absorption coefficient, bandgap) for different thickness TiO2-WO3 thin films were determined in UV-visible light range.

Photocatalyitic measurements were carried out using methylene blue (MB) solution under UV irradiation. Light absorption measurements were used to calculate MB concentration after photodegradation had occurred. Photoacatalytic properties of obtained coatings were assessed in dependence on TiO2/ WO3 content ratio.

Uniform TiO2-WO3 coatings have been successfully prepared by electrophoretic deposition method on stainless steel substrates. X-ray diffraction patterns confirmed the crystallization of anatase TiO2 with average particle size ~200 nm and monocline WO3 with particle size ~100 nm, while scanning electron micrographs showed WO3 size distribution of 200–400 nm. The removal ratio of methylene blue depends on the (TiO2)/(WO3) concentration ratio. The most effective photodegradation was determined for the sample that was electrophoretically deposited from the suspension with the molar content ratio n(TiO2)/n(WO3) 2:1 with the resulting content of WO3 17.8% - after 6 hours of UV irradiation MB had decomposed to less than 10% of its initial concentration.

The financial support of Latvian State Research Program IMIS-2 is greatly acknowledged. Presenting author G. Bajars

acknowledges a financial support from COST action MP 1106.

1) S.B. Kim et al., Appl. Catal. B Environ., 35 (2002) 305. 2) J. Georgieva et al., J. Hazardous Matter., 211-212 (2012) 30. 3) M. Landmann et al., J. Phys.: Condens. Matter., 24 (2012) 195. 4) I. Liepina et al., IOP Conf. Series: Material Science and Engeneering, 49 (2013) 012060.

93

P-26 Presenting Author: Angela Staicu Preferred Format: Poster E-mail: [email protected] Main Topic: Materials

Laser photocatalytic effect of TiO2 nanoparticles for water pollutants removal

V. Nastasaa,b, M. Bonia,b, A. Smarandachea,b, T. Alexandrua,b, A. Staicua, I.R. Andreia, A, Dinachea, Z. Saponjicc, M.L. Pascua,b

aNational Institute for Laser Plasma and Radiation Physics, Magurele, Romania bFaculty of Physics, University of Bucharest, Romania

cVinča Institute of Nuclear Sciences, Department of Radiation Chemistry and Physics, Serbia

Environmental pollution with organic or inorganic substances is a major global problem which leads to the need to develop ways to purify the contaminated water sources. Water is typically referred to as polluted when it is impaired by anthropogenic contaminants that influence their properties and makes it unsuitable for human use. Natural phenomena such as volcanoes eruptions, algae blooms, storms, and earthquakes could also induce modifications of water quality [1].

An increasing interest is shown in the use of nanoparticles to pollution reversal (remediation) mainly due to their surface properties and also to other specific changes in their physical, chemical and biological properties acquired as a consequence of their small size effects [2].

This study presents results regarding the possibility to use titanium dioxide nanoparticles (TiO2) for photocatalytic water treatment, a well-known advanced oxidation process (AOP) for environmental remediation. AOP produces OH•, which has stronger oxidation capabilities than regular oxidants and decomposes the organic compounds into relatively harmless compounds, such as CO2, H2O, or HCl.

As pollutants, several neuroleptic phenothiazines were selected. Previous results showed that their exposure to UV laser light a certain time interval leads to a breakup of the molecules into several photoproducts [3]. The addition of TiO2 can enhance the effect of UV light and lower the time needed to destroy a phenothiazine molecule. Studies on microdroplets containing Rhodamine 6G solutions in water doped with TiO2 nanoparticles were performed. The effect of laser irradiation function of TiO2 concentration was investigated by laser induced fluorescence spectroscopy. The photocatalytic effect of TiO2 on the dye degradation was shown. The irradiation on microdroplets leads to differences in the time intervals needed for degradation effects to occur with respect to bulk samples. Acknowledgements

This work was supported by ANCSI through project number NUCLEU project PN0939/2009, the COST Action MP1106 “Smart and green interfaces - from single bubbles and drops to industrial, environmental and biomedical applications (SGI) and the POSDRU/159/1.5/S/ 137750 project. 1) S. Baruah, et al., Nanoscience & Nanotechnology-Asia, 2 (2012), 2. 2) M. A. Lazar, et al., Catalysts, 2 (2012) 572. 3) M.L. Pascu, et al., PLoS ONE, 8 (2013), e55767.

P-27

94

Presenting Author: Mustafa Ersoz Preferred Format: Poster E-mail: [email protected] Main Topic: Materials

Electrodeposition of Copper Nanoparticles at the Water/1,2-dichloroetane Interface

E. Aslan, I. Hatay Patir, M. Ersoz

Department of Chemistry, Selcuk University, Konya, Turkey

Electrodeposition of metal particles at the interface between two immiscible electrolyte solutions (ITIES) may cause interesting electronic, optical, sensing, and catalytic applications. The first report on the deposition of metals at liquid–liquid interfaces was carried out by Guainazzi et al. in 1975 who reported that the passage of electric current across the interface between Cu+2 ions in a water phase and V(CO)6

- ions in a 1,2-dichloroethane (DCE) phase led to deposition of copper metallic layers at the liquid–liquid interface. [1] Metallic particles adsorbed at the ITIES could offer a novel approach to preparation of catalysts for energy research such as oxygen reduction and hydrogen evolution reactions.

In the work, copper nanoparticles are generated in situ at the water/DCE interface by the reduction of Cu+2 ions in the aqueous phase and by using lipophilic decamethylferrocene (DMFc) as an electron donor in the organic phase. The deposited Cu nanoparticles have been analyzed for the first time by transmission electron microscopy (TEM), selected area electron diffraction (SAED), scanning electron microscopy (SEM), energy dispersive X-ray microanalysis (EDX), X-ray diffraction (XRD) and by a particle size analyzer. [2] The electrochemical deposition of Cu nanoparticles with an average diameter of approximately 25-35 nm has been reported at liquid/liquid interfaces by using an organic phase electron donor DMFc.

1) M. Guainazzi et al., J. Chem. Soc. Chem. Commun., (1975), 200-201. 2) E. Aslan at al., , Chem. Eur. J., 21 (2015), DOI: 10.1002/chem.201406615

95

P-28 Presenting Author: Stefano Perni Preferred Format: Poster E-mail: [email protected] Main Topic: Materials Cobalt and Titanium Nanoparticle Influence on Mesenchymal Stem Cell Elasticity and

Turgidity

S. Perni, a,b , Emily Callard Preedy, a P. Prokopovich a,b

a School of Pharmacy and Pharmaceutical Sciences, Cardiff University, CF10 3 NB, Cardiff, UK b Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

Total joint replacement (TJR) and total disc replacement (TDR) have become increasingly popular in light of improving life quality and increasing life expectancies. [1,2]. Longevity of total joint and disc arthroplasty are extremely important and they are mainly affected by the wear performance of the implants [3,4]. Bone cells are often reported as being damaged by inflammatory responses due to wear particles originating from the implant. Wear particles initiates the immune response often causing osteolysis and aseptic loosening of the articulated implanted device. Not only does the size cause a macrophage response but the composition of the metal particles associated with the wear particles can also have a toxic effect on the surrounding cells, especially on mesenchymal stem cells (MSCs). Damage to these cells effect the renewal of bone which may be harmful to the longevity of the device and the comfort of the patient. Generally, investigations on nanoparticle influence on mamalian cells are focused on the assessment of cell viability, cytokines release and gene up/down regulation. However, cell nanomechanical properties such as elasticity and turgor pressure have been shown to be involved in biologival responses to both chemical or physical cues and therefore, wear particles induced changes in cell mechanical properties, could lead to further understanding of interactions between cells and nanoparticles.

The following study aims at investigating the effect on cell elasticity and spring constant, linked to cell turgidity, of MSCs cells when exposed to Cobalt (Co) and Titanium (Ti) nanoparticles of different sizes for up to 3 days. AFM nanoindentation was carried out on multiple location on each cell to determine the spatial variation of the mechanical properties whilst viability was assessed using flowcytometry and MTT assay. Elasticity and cell spring constant were estimated through fitting of different regions of the indentation curve. The results demonstrated that cells exposed to increasing concentrations of nanoparticles had a lower value of elasticity and spring constant without significant effect on cell viability as shown by MTT assay and flowcytometry. Cobalt induced grater effect than Titatium and this is consistent with the general knowledge of citocompatibility of the later. Moreover, lower elasticity is physiologically linked to a lower turgor pressure as cells can substain only small size variations, in response to osmotic pressure changes, without inreversible damage.

This work demonstrates for the first time that metal nanoparticles originated from wear of orthopeadic devices do not only influence cell enzyme activity but also cell structure; however do not result in full membrane damage. Furthermore, the mechanical changes are concentration and particles composition dependent but little influence is due by the size.

1) F. Birrel et al., Ann. Rheum. Dis,. 58 (1999) 569. 2) M.S. Kuster et al., Orthopedics, 25(2 suppl) (2002) S235. 3) P.F. Sharkey et al., Clin. Orthop. Relat. Res., 404 (2002) 7. 4) D.D. Naudie et al., J. Amer. Acad. Orthop. Surg. 15 (2007) 53.

96

P-29 Presenting Author: Mojtaba Mirzaeian Preferred Format: Poster

E-mail: [email protected] Main Topic: Materials

Electrochemical investigation and surface characteristic studies of stainless steel substrates coated by chromium oxide thin films through reactive magnetron sputtering

for biomedical applications

A. Ogwu, M. Mirzaeian, A. M. Oje

School of Engineering and Computing, University of the West of Scotland, Paisley, PA1 2BE, Scotland, UK.

Due to their lower volume of wear and wear rate when compared to metal on polymer (MOP) and ceramic on polymer (COP) implants, metal on metal (MOM) implants are gaining increasing interest as alternative materials in total joint replacements in recent years. However, owing to the release of metallic ions and adverse biological effects, materials used for MOM implant applications are restricted to a few corrosion resistant biocompatible materials with good mechanical properties such as titanium alloys and 316l stainless steel. Although the low cost of stainless steel makes it as a material of choice implant applications especially for temporary implants like screws and plates, nonetheless studies on retrieved stainless steel based implants show that more than 90% of the failures of 316l stainless steel implant are due to pitting and crevice corrosion attack resulting in the release of Fe ions to the body system[1]. Among different approaches such as the replacement of the bulk material, surface coating, surface modification and cushion bearing suggested to overcome this issue, surface coating/modification through which the surface properties of stainless steel based MOM implant materials when coated by the thin film of a metal oxide could be improved while retaining their bulk properties is of interest. Chromium oxide is the best choice for coating material because of its excellent properties such as good wear resistance, low friction coefficient, high hardness and chemical inertness [2,3] and chromium oxide thin films have been have been widely used through deposition by physical vapour deposition; chemical vapour deposition, electron-beam evaporation, and pulse laser deposition methods in many applications [4,5]. In this study chromium oxide thin films as implantable coating are deposited on the steel substrates to eliminate or further reduce the wear rate, corrosion, metal ion release and inflammatory response in patients with stainless steel based MOM bearings and increase the life time of the MOM bearings. The synthesised coated films were characterised by XRD, SEM, EDAX and Raman spectroscopy for structural, growth mode/surface morphological, chemical and physical properties. The surface characteristics and wettability of the coated films were studied through surface energy and contact angle measurements using a goniometer. The surface energy of the films was investigated through the dispersive, polar and acid-base component utilising the geometric mean and Lifshitz van der Waals acid-base approaches. The corrosion performance of chromium oxide thin films deposited on stainless steel substrates at various deposition conditions by reactive magnetron sputtering were studied when exposed to a range of saline solutions similar to the physiological solution in body. The corrosion evaluation involved open circuit potential (OCP), potentiodynamic and cyclic polarisation measurements. The results obtained through contact angle measurements revealed that chromium oxide coatings are hydrophilic and films with better wettability can be produced at lower oxygen flow rates. The XRD and SEM results indicate that the prepared films are amorphous with a mixture of Frank Van der Merve and Volmer-weber dominating the growth mode. The corrosion resistance of the films were found to vary with deposition powers and oxygen flow rates. Chromium oxide coated stainless steels showed superior corrosion resistance when compared to the uncoated stainless steel. The enhanced corrosion resistance by chromium oxide films open up opportunities and potentials for the films as a protective coating to improve corrosion resistance of metals and alloys for a wide range of engineering applications such as industrial pipelines in oil and gas sectors.

1) H. Douglas, The Electrochemical society Interface. pp 31-34, summer 2008 2) B. Bhushan, G.S. Theunissen et al, Thin Solid Films volume 311 (1997) 67 3) E. Sourty et al. Tribology International 36 (2003) 389–396 4) S. Hong et al. Journal of Non-Crystalline Solids 221 (1997) 245 -254 5) P. Hones, M. Diserens, F. Levy, Surface and Coatings Technology 120 -121 (1999) 277 – 283

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ntact with variossian type wateter electrolyticught in contac

ure 30oC, and w. At the end of

ces and calculaes from waterd (21%)< SS 1ed (94.7%) < Ser contact withmass balance s metallic form

e surface of SS

M micrographs

Rodriguez et al., SAE Inter. Techdgements: T

ENT FOR LON

a Petala h.gr

ormance in

s1, I. Mintsio

ntal Engineering

al Chemistry, De

esearch Laboratoand Thrace I

hnology, Depart

acknowledged aattractive featu

the disinfectionauts. Studiewater even aft

ter quality degrous stainless ster”, which is thally, so as to rt with various

was stored eithf the storage peate the overall Ar containing 1015-5 pH, H102SS316L (96.8%h SS surfaces.

closed reasonm on the SS sur316L while co

of a SS 316L c

, Appl. Environ. h. Paper Series, his work w

NG TER WATE

n the potabl

uli2, Th. SpaKa

g and Planning, DThessalo

epartment of Che

ory, DepartmentInstitute of Techtment of Chemis

as effective bioures, includinging agent of ds about the stater short term wradation. This teel (SS) surfahe potable watreach either a s

stainless steelher for 7d (wateriod all SS surAg mass balan0 mg Ag+/L fo

25(78.4%) < 31%). On the otheLeaching of S

nably, above 9rface, in line wmponents of th

coupon in a loc

Microb. 74 (2002009-01-2459 (

was supported ER STORAGE

le water tan

anos3, M. Kosarapantsios4

Department of Coniki, 54124, Greemistry, Aristotl

t of Petroleum annology, Ag. Loutry, Aristotle Un

ocide against pg absence of cdrinkng water ability of waterwater storage istudy investig

aces. Synthetic ter consumed bsilver ions’ conl (SS) surfaces ter with high Arfaces were eithce, or subjecte

followed the or16L with GTAer hand, silver

SS surfaces ver90%, in all cawith a galvaniche underlying m

cation in conta

08) 1639. (2009).

by ESA (E’.

nks of the

stoglou4, S. S

Civil Engineerineece le University of T

nd Mechanical Eukas, 65404 Kavaniversity of Thess

planktonic bactcolor, taste, odconsumed in r quality disinin metallic wagates the losse

water was useby European auncentration equs at surface (S)Ag concentratiher leached, in

ed to XPS analyrder: SS 316L

AW welding (84r was completerified the depoases. XPS resuc replacement mmetal are oxidi

act with water a

(European Sp

Pref M

Internation

Sotiropoulos2

ng, Aristotle Univ

Thessaloniki, Th

Engineering Scieala, Greece saloniki, Thessa

teria, while it hdor and disinfInternational

nfected using sater tanks [2], is of silver ioned throughout ustronauts in thual to 10 or 0.5) to volume (Vion) or 28 d (wn order to examysis.

L NASA/JSC P4.2%) < SS316ely depleted froosition of silveults for SS316mechanism. Acized.

after Ar-sputter

pace Agency


nal Space

2, E. Darakas

versity of Thessa

hessaloniki, Gree

ences, Eastern M

aloniki, 54124, G

has bactericidalfection by-proSpace Station

silver have demimplying potens from water bthe study simu

the ISS. Silver 5 mg Ag+/L. A

V) ratio equal twater containin

mine the deposi

PRC-5002 pas6L NASA/JSCom water cont

er onto the SS 6L showed thaccording to thi

ring for 60 sec

) project : ‘

97

at: Poster Materials

Station

s1, Th.

aloniki,

ece

Macedonia

Greece

l effects in oducts [1]. n (ISS) by monstrated ntial water bulk when ulating the ions were

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ssivated & C SS PRC-taining 0.5 materials,

at Ag was is, silver is

c.

BIOCIDE

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P-31 Presenting AE-mail: argir

The mechanismwith the help othe basic paramexperimental dof given condconducted in simulations wecorrespond to for each case comparison ofselect and set simulation datbetween the sosimulations (Ftemperature fietemperature va

Author: Chrisropoulosc@g

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99

P-32 Presenting Author: Gunars Bajars Preferred Format: Poster E-mail: [email protected] Main Topic: Dispersed systems

Electrophoretic deposition of LiFePO4 cathode for lithium ion batteries

K. Bikova, G. Kucinskis, G. Bajars

Institute of Solid State Physics, University of Latvia, 8 Kengaraga street, Riga, LV-1063, Latvia

Electrophoresis is a method of moving charged particles through a medium by using an electric field induced by electrodes. Therefore particles can be ionized, moved and deposited on the electrodes under the influence of an electrical field [1]. Electrophoretic deposition allows efficient coating of surfaces with various geometries and is therefore popular in making various coatings. It has recently also been used in the field of lithium batteries.

LiFePO4 is a widely researched cathode material for lithium ion batteries. LiFePO4 cathodes were first prepared by electrophoretic deposition method (EPD) by Mazor et al. [2]. The authors deposited dispersed LiFePO4 in acetone and electrophoretically obtained thin films with a specific discharge capacity of 163 mAh/g, which is remarkably close to the theoretical specific capacity of LiFePO4 (170 mAh/g). However, it is unclear, wheather this method can provide a good binding between the electrode and current collector, as the soulubility of the most readily available binders used for lithium ion batteries in acetone is poor.

In our work LiFePO4 and carbon black were dispersed in N-Methyl-2-pyrrolidone (NMP). 5 % polyvinylidene fluoride (PVDF) binder was dispersed in the solvent. PVDF has a better solubility in NMP than in acetone, therefore enabling easier preparation of the dispersion. Various amounts of the non-ionic surfactant Triton X-100 (TX-100) were added to the dispersion in order to study the optimal ammount of the surfactant necessary for electrophoretic dispersion.

The results show that in the case where TX-100 was not added, electrophoretic LiFePO4 deposition was not successful. After adding 0.4% (v/v) TX-100, LiFePO4 thin film was successfully deposited. However, the deposition rate was rather slow. A thicker film was obtained by adding 1.6 % (v/v) of TX-100, which is the biggest amount of TX-100 that was added to the suspension. EPD has been done for 15 min with electric fields 100 V/cm and 120 V/cm.

Fig. 1 Charge and discharge curves for LiFePO4 deposited with EPD for 15 min with electric field a) 100 V/cm; b) 120 V/cm.

Charge-discharge curves (Fig. 1) show that the specific capacity (mAh/g) is larger in the case where EPD was carried out for 15 min with an electric field 100 V/cm. Increasing the electric field to 120 V/cm does not increase the deposition rate and worsens the specific charge capacity due to undesirable changes in the electrode morphology.

The financial support of Latvian project of scientific cooperation 666/2014 is greatly acknowledged. Presenting author G. Bajars acknowledges a financial support from COST action MP 1106. 1) J. Lyklema, “Fundamentals of Interface and Colloid Science,” Vol II, p. 3.208. Academic Press, London, 1995. 2) H. Mazor at al., J. of Power Sources, 198 (2012) 264.

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P-33 Presenting A

E-mail: milie

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Author: Mind

[email protected]

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important thertor is the plasmw and dispersi fibrillation pr

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daugas Milieš

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M. Milieška, R

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R. Kėželis, V.

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Pref

Main Topi

particles in

T-44403, Kaunas

ction of ceramreactor walls.

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and etc. are diffoduction is im

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asma reactors

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atio between the length of theound 200 m/s ar shadow laser

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mic fibre in thThe drag forc

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not commercire usually comferent in variou

mpossible. Con

f the reactor

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in the reactoof dispersive pe particles ande reactor was at the end of thimaging syste

100

at: Poster

d systems

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P-34 Presenting AE-mail: t.sos

Faculty o

Inhalaadvantage of lallow transporcandidates for hand, nanopowparticulate adhachieve good a

Polymby water-basesynthesized naspray-drying ccyclone, and tcommercial ca(Malvern Spraperformed with

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In conbe produced byinhaler producparticles are prdeposition in troute.

Fig. 1 (a) Finepicture of PD mAcknowledgmenassistance in the1) T.R. Sosnows2) M. Changdao3) A. J. Domb, J4) Tongdeesoon

Author: Tomanowski@ichip

Formation

of Chemical and

ation of aeroslow mass tranrting active mcarriers of inh

wders cannot hesion forces [1aerosolization americ nanoparted synthesis [2anoparticles waconducted in Btheir size and apsule-type inhaytec). Finally, h the nanoparti

hesized PD andders had grain the drying con6 μm for PD n of the lungsto be above 80

ne (120-180 nmnclusion, microy the optimizece aerosol withrecursors of nathe pulmonary

particle fractiomicroparticles nt: Work done une preparation anski, J.Nanosci. No et al., Food HyJ. Kost, D.M. Wntorn W. et al., C

asz Sosnowskip.pw.edu.pl

n of inhala

d Process Engine

olized medicinsfer resistance

molecules very halable drugs, be effectively

1]. Preparationand high pulmoicles were prep

2]. Both polymas determined

B-290 Mini Spshape were ch

haler, and the pthe experimen

icle assessmend DC nanoparsizes in the res

nditions (Fig. 1and DC respe. So called fin

0% (Fig.1a). Rem). ometer-sized d

ed spray dryingh the characte

anostructures afluid, the pres

on (FPF) of PDobtained at co

nder the umbrellnd characterziatiNanotechnol., 15drocolloids 27 (

Wiseman (Eds.). HChem. Centr. J. 5

ki

able micro-

K. Jabłczyń

eering, Warsaw

nes is a convee across thin a

effectively togiving additio

y aerosolized n of micrometeronary drug deppared of polyalmers are expeby Nanosight

prayer (Buchi) haracterized bparticle size dints focused on nt done with NTrticles had the spirable range 1b). After dispeectively, suggene particle frace-hydration of

dry inhalable pg method usingeristics requirefter mixing wi

sented methodo

D micro-particlnditions indicala of COST Actioion of nanosuspe5 (2015) 3476. 2012) 22.

Handbook of Bio5 (2011) 6.

-sized prec

ńska, T.R. So

University of Te

enient way ofair/blood barrieo the circulatioonal possibilitywith the comr-sized nanostrposition duringldehyde dextracted to be bioNTA system. at various proy SEM (Hitacstribution in ththe restoration

TA method. mean sizes ofof 0.5-5 μm bersion to aerossting in both c

ction (FPF, i.e.f dry powders a

articles made og nanosuspensied for pulmonath water. As siology offers th

les as a functioated as * in panon MP1106. Theensions.

odegradable Poly

cusors of d

osnowski

echnology, Wary

f therapy. Sucer which - togon. Biodegrady of prolonged

mmonly used pructured powdeg inhalation. an (PD) and diaodegradable anAqueous nano

ocess conditionchi). Powders he aerosol phan of the nanost

f 170 and 120but they had difsol, the mediancases good po. the total masallowed to obta

of selected bioion as a feed. Tary delivery vimilar process he concept usef

on of temperatunel (a). e authors thank A

lymers, Harwood

Preferr Main Top

drug nanoca

yńskiego 1, 00-6

ch method of gether with thedable polymer d (or controllepowder inhaleers is therefore

aldehyde carbond biocompatiosuspensions wns. Dry particlwere used to

ase was determtructures by po

0 nm, respectivfferent surfacen particle size ossibility of pass of particles ain nanoparticl

odegradable poThe powders avia inhalation. should occur iful in nanodru

ure flow of the

A. Kulikowska a

d Acad. Publ., A

red Format: Ppic: Dispersed

arriers

645 Warsaw, Pol

drug delivery e huge absorpt

nanoparticles d) release. On

ers due to stroe an attractive s

oxymethylcelluible [3, 4]. Th

were used as thes were collecgenerate aero

mined by laser dowder re-hydra

vely. Accordine morphology wwas in the ran

article penetratsmaller than 5les with the siz

olymers: PD anaerosolized in t

Moreover, suin the lungs aftg delivery via

inlet air; (b) S

and M. Janczews

Amsterdam, 1997

101

Poster d systems

land

takes the tion area -

are good n the other ong inter-strategy to

ulose (DC) he size of he feed for cted in the sols using diffraction ation were

ng to SEM which was nge of 2.0-tion to the 5 μm) was ze close to

nd DC can the typical

uch micro-ter particle inhalative

SEM

ska for their

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23

P-35 Presenting A

E-mail: t.sos

Enhancem

Faculty o

Broncimportant wheavoid this limicarriers of drug

In thimucus (RBM)mucin (the maconcentration modified by coRBM at diffeviscometer (Smcoefficient, De

compound (Rhmathematical resistance [e.g

The amucin concenacetylcysteine.to 150-160 mPeven up to 4.2apparent visco

Thesespeeding-up ofallow for fastediseased lungs

Fig. 1 The genRhodamine B.Acknowledgmenno. DEC-2011/01) L. Gradoń, T.2) M. Odziomek3) L. R. Shaw et

Author: Tomanowski@ichip

ment of tran

of Chemical and

chial mucus foen the mucus laitation has beengs delivered ass communicati). Studies wereain componentcorresponding

omposite FCPserent concentramart FungiLabeff, through thehodamine B) bsimplifications. 3]. apparent viscosntration, respec. After additionPas, i.e. by alm2·10-10 m2/s (i.osities and the ee results confif the diffusion.er delivery of

s.

neral relationsh

nt: Work done un03/N/ST8/04912).R. Sosnowski, Mk, T.R. Sosnowskt al. Int. J. Pharm

asz Sosnowskip.pw.edu.pl

nsport prop

d Process Engine

orms the barrieayer is thick ann proposed recs inhaled powdion we presente done in diffut of the natura

g both to healts prepared of dations (up to b, Spain) at thee mucus layer ased on the sps of the proces

sity of the RBMctively. It wasn of composite

most 50%. Deff fe. by more thaeffective diffusirm that additi. It can be exp

f pharmacologi

hip between the

nder the umbrell). M. Pirożyński Paki, L. Gradoń Inmaceutics 290 (2

ki

perties of bvit

M. Odziom

eering, Warsaw

er in absorptiond highly viscocently as a concders [1, 2]. t results of the fusion side-by-al mucus) accoth and diseaseddextran/N-acety20 mg/ml). A strain rates coembedded by

ectroflurometrss: quasi steady

M at the applis slightly incre FCPs (10 mgfor Rhodaminean 80%) after sion coefficiention of FCPs lected that the aically active in

e apparent visc

la of COST Actio

atent Applicationt. J. Pharmaceu2005) 145.

bronchial mtro studies

mek, T.R. Sos

University of Te

on of drugs deous which is a cept of Functio

study of the m-side cells (Perording to procd conditions. Rylcysteine by sp

Apparent visocorresponding toy two polymerric analysis (Luy-state and on

ied strain rate wreased after adg/ml) to 20% Re B in 20% mu

FCPs additionts for all studielead to the reapplication of ngredients to t

osity, μapp, of R

on MP1106. Fin

n EP2278959 A2utics 433 (2012)

mucus by n

snowski

echnology, Wary

elivered via intypical situatioonal Carrier Pa

mass transfer rarmeGear, Germ

cedures describRheological an

spray-drying ascity, μapp, of tho the physiologric porous memumina - Thermne-dimensional

was 16, 285, addition of dex

RBM ("mucus iucus was initialn (10 mg/ml). ed cases is giveeduction in musuch powders the epithelial

RBM and the e

nancial support b

2 (2009). 51.

Pref Main To

novel inhal

yńskiego 1, 00-6

nhalation. Thison in many lunarticles (FCPs)

ate through themany). The Rbed in the liternd transport ps described elsehe RBM was gical ones (~ 8mbranes was

mo Scientific, Ul transport at th

and 400 mPas xtran but reduin disease"), thlly around 2.3·The general r

en in Fig 1. ucus viscosityas carriers of cells through

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by NCN project i

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properties of Rewhere [2], andstudied with

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ion coefficient

is appreciated (d

102

at: Poster ex liquids

cles - in

land

articularly method to be used as

d bronchial pared from 0% - 40%

RBM were d added to rotational

e diffusion r a model g common membrane

% and 40% ion of N-as reduced

d increased etween the

multaneous icines will mucus in

t Deff for

(decision

PPE

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P-36 Presenting AE-mail: sergi

Dipartimento d

Oil industries conventional ounconventionacategory accorcrude oil extradeposition on tby bulk rheolocrude oil pipedetailed investthe tiniest fluihandling of preoil emulsion flthe waxy crudoil emulsion. Iphase have beemicroscopy. Tmeasurements the presence o

Author: Sergioio.caserta@u

Rh

di Ingegneria Ch

have been devoil reserves. Ual ones. Neverding to techn

action and prodthe tube walls

ogy. However, line flow, andtigation of the d mechanics eessure drop inc

fluid made of me oil emulsion

In particular, then investigatedThe parallel p

were performf a gelling pha

o Caserta unina.it

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A. Pera

himica, dei Mater

voting an upsuUsually, oils areertheless, resounological improduction represeduring pipelinbeing water ub

d a comprehenmorphology e

evolution detaicrease and evenmineral oil andns, being the fohe dynamic of dd. The experimplate apparatu

med by image ase that accumu

Fig. 1

l Analysis

azzoa, G. Mer

riali e della Proof Naples Fe

urge of interese defined convurces hitherto ovements and

ents one of the ne flow tube clobiquitous withinsive rheologicevolution underils, direct opticntual clogging

d paraffin wax ormer easier to deformation an

ments were carrus is able to analysis techniqulated at the int

1: Microscope

of Waxy C

ranoa, S. Cas

duzione Industriederico II, Naple

st in unconvenventional when

considered ueconomic con

toughest technogging could oin oil reservoircal characterizar flow is compcal observationin waxy crudehas been explobe visualized

nd relaxation oried out in a paimpose a ful

ques. Drop defterface.

image of oil-w

Crude Oil E

sertaa, S. Gui

iale, Scuola Polies, Italy.

ntional oil soun easier and cunconventionalnsiderations. Wnological challeoccur. Waxy cr, waxy crude eation of these pletely lackingn under flow ie oil emulsion oited in order by optical mic

of a single watearallel plate applly developed formation and

water emulsion

Pref Main To

Emulsions

idoa

itecnica e delle s

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croscopy with er droplet withparatus equippand controlle

relaxation was

n.

ferred Formaopic: Comple

scienze di base,

he increasing sduce with respe into the conventional reservatter, due to wabeen intensive

often encounterlacking. Furth

the possibility technique to a

work a model wrheological behrespect to the in a waxy oil c

ped with videoed shear flows observed to d

103

at: Poster ex liquids

University

scarcity of pect to the nventional ves, waxy ax crystals ely studied red during

hermore, a to unravel ddress the

waxy crude haviour of real crude

continuous -enhanced

w and the depend on

PPE

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AF

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P-37 Presenting AE-mail: milic

Surf

Milic

Laboratory

The colloidal characterized uwith selected efound to alter results in a reeffective band

AcknowledgmeFinancial suppo

OI172056). Thi


face modif

a Carević, T

y for Radiation C

ZrO2 nanopausing UV/Vis enediol ligands

the optical prd shift of the gap upon incre

Figure 1. different li

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s work is suppor

a Carević s

fication of

atjana D. Sa

Chemistry and P

rticles were hspectroscopy a

s: catechol (CAroperties of nasemiconducto

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Absorption spigands (0.45 m

p

was granted by

rted by COST A

zirconia na

avić, Nadica D

Physics, Vinča In

hydrolytically sand x-ray diffr

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pectra of bare (mM): (2) CAT; pure modifiers

y the Ministry of

Action MP1106.

anoparticle

D. Abazović,

nstitute of Nuclea

synthesized anraction. The suroxynaphthalenhe formation o

onset comparedzation after the

1) and surface (3) 2,3-DHN; are: (6)-(9), re

f Education and

es with sel

, Ivana A. Ja

ar Sciences, Uni

nd its optical urface modificane (2,3-DHN), of the inner-spd to unmodifieinclusion of ad

modified ZrO(4) ANT, (5) q

espectively.

Science of the R

Pref M

lected ened

anković, Mirj

iversity of Belgr

properties andation of ZrO2 anthrarobin (A

phere charge-ted nanocrystaldditional rings

2 nanoparticlesquercetin. Spec

Republic of Serb


diol ligands

jana I. Čomo

rade, Belgrade, S

d crystal strucnanocrystallin

ANT) and quertransfer (CT) cllites, and a des.

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rbia (Projects: II

104


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P-38 Presenting Author: Mila Vranješ Preferred Format: Poster E-mail: [email protected] Main Topic: Materials

Photocatalytic activity of elongated TiO2 nanocrystals

M. Vranješa, Z. Šaponjića, Lj. Živkovića, V. Despotovićb, D. Šojićb, B. Abramovićb, M. Čomora

a Laboratory for Radiation Chemistry and Physics, Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia

b Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg D. Obradovića 3, 21000 Novi Sad, Serbia

Titanium dioxide nanotubes (TNT) were synthesized via hydrothermal method and calcined at various temperatures, from 200-800 °C. Morphologies of the obtained calcined TiO2 nanomaterials were characterized by transmission and scanning electron microscopy (TEM, FESEM/SEM). SEM analysis revealed that the morphology of the samples is significantly affected by the calcinations temperature. Elongated forms of titania with different aspect ratios were observed after calcination at all temperatures lower than 800 °C, while the calcination at 800 °C induced complete transformation of TNT to nanoparticles. X-ray diffraction (XRD) analysis confirmed that shape transformation was accompanied with changes in degree of crystallinity and different anatase to rutile crystal phase ratio. The photocatalytic activity of obtained nanopowders was evaluated considering photodegradation rate of herbicide clomazone. The influence of calcination temperature of catalysts with elongated morphology on their photocatalytic activity was evaluated. Photocatalytic activity of elongated nanocrystals reached max for TNT annealed at 700 °C, which can be assigned to the best balance between crystal structure, morphology and surface properties of nanoparticles induced by annealing. Also the influence of molecular structure of the substrate was studied, following and comparing photocatalytical degradation of herbicides clomazone, picloram and mecoprop. No significant influence of molecular structure was detected when the degradation rates of parent herbicides were compared.

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List of participants No. Name Country E-mail Book of

abstracts 1. Istvan Szilagyi

SWITZERLAND

[email protected] p.63

2. Juan Kiwi [email protected] p.28

3. Abraham Marmur ISRAEL [email protected] p.40

4. Anže Sitar SLOVENIA

[email protected]‐lj.si p.26

5. Andrej Jeromen [email protected]‐lj.si p.45

6. J.G.M. Kuerten THE

NETHERLANDS


7. Simeon Stoyanov [email protected] p.37

8. Victoria Dutschk [email protected] p.10

9. Jutta Krausse [email protected] p.31

10. Reinhard Miller GERMANY


11. Doris Vollmer vollmer@mpip‐mainz.mpg.de p.3

12. Jiri Vejrazka CZECH

REPUBLIC


13. Jaroslav Tihon [email protected] p.89

14. Pavlina Basarova [email protected] p.84

15. Carmen Moran

SPAIN


16. Juan Mancebo‐Aracil


17. Miguel Cabrerizo Vílchez


18. Ramon Gonzales Rubio


19. Duško Čakara CROATIA [email protected] p.11

20. Sándor Bárány HUNGARY akmbsab@uni‐miskolc.hu p.64

21. Gunars Bajars LATVIA [email protected] p.52, p.92, p.99

22. Mindaugas Milieška

LITHUANIA [email protected] p.100

23. Romualdas Kėželis [email protected] p.90

24. Andra Dinache ROMANIA


25. Angela Staicu [email protected] p.93

26. Mihail Pascu [email protected] p.22

108

No. Name Country E-mail Book of abstracts

27. Marite Cardenas SWEDEN


28. Srdjan Sasic [email protected] p.59

29. Libero Liggieri

ITALIA


30. Luigi Cristofolini [email protected] p.18

31. Michele Ferrari [email protected] p.74

32. Ileana Malavasi [email protected] p.13

33. Stefano Guido [email protected] p.30, p.78

34. Flora Ascione [email protected] p.75

35. Sergio Caserta [email protected] p.25, p.76, p.103

36. Mickael Antoni FRANCE

m.antoni@univ‐amu.fr p.41

37. David Brutin david.brutin@univ‐amu.fr p.88

38. Anna Gyurova BULGARIA


39. Elena Mileva [email protected] p.14

40. Morteza Ghorbani

TURKEY


41. Metin Muradoglu [email protected] p.60

42. Mustafa Ersoz [email protected] p.94

43. Denis Weaire IRELAND


44. Matthias Möbius [email protected] p.66

45. Norman McMillan [email protected] p.46

46. Tomasz Sosnowski

POLAND

[email protected] p.101, p.102

47. Jan Zawala nczawala@cyf‐kr.edu.pl p.32, p.71

48. Marcel Krzan nckrzan@cyf‐kr.edu.pl p.36, p.72

49. Janusz Nowicki [email protected] p.69

50. Piotr Warszyński ncwarszy@cyf‐kr.edu.pl p.62

51. Ronald Terrazas Mallea

BELGIUM


52. Cosimo Buffone [email protected] p.6

53. Carlo Saverio Iorio [email protected] p.27

109


54. David Fairhurst

UNITED KINGDOM


55. Christopher Hamlett


56. Stefano Perni [email protected] p.56, p.95

57. Zuzana Brabcova [email protected] p.86

58. Christophe Trabi [email protected] p.20

59. Mojtaba Mirzaeian [email protected] p.96

60. Gary Wells [email protected] p.47

61. Khelil Sefiane [email protected] p.1

62. Vasileios Koutsos [email protected] p.29

63. Margaritis Kostoglou

GREECE


64. Christos Argyropoulos


65. John Lioumbas [email protected] p.77

66. Nikolaos Kokkinos [email protected] p.87

67. Maria Vlachou [email protected] p.24

68. Ourania Oikonomidou


69. George Karapetsas [email protected] p.51

70. Christos Koukiotis [email protected] p.82

71. Sotiris Evgenidis [email protected] p.44

71. Misel Gannoum [email protected] p.91

72. Evangelia Chrysina [email protected] p.5

73. Melani Frysali [email protected] p.48

74. Thodoris Karapantsios


75. Maria Petala [email protected] p.97

76. Alexey Bykov RUSSIA

ag‐[email protected] p.16

77. Boris Noskov [email protected] p.12

78. Julia Fedotova BELARUS [email protected] p.17

79. Bernhard Peters LUXEMBURG [email protected]

110


80. Sandra Bučko

SERBIA


81. Jelena Milinković [email protected] p.68

82. Jaroslav Katona [email protected] p.83

83. Zoran Šaponjić [email protected] p.55, p.105

84. Mirjana Čomor [email protected] p.55, p.57p.104‐106

85. Nadica Abazović [email protected] p.57

86. Marija Radoičić [email protected] p.55

87. Mila Vranješ [email protected] p.105

88. Tatjana Savić [email protected] p.106

89. Milica Carević [email protected] p.104

organization - elex comm of abstracts final.pdffoams and emulsions, continuing bubble and drop...

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