porometer design for stretched membrane/fabric · pdf fileporometer design for stretched...

POROMETER DESIGN FOR STRETCHED MEMBRANE/FABRIC MATERIALS POROMETER DESIGN FOR STRETCHED MEMBRANE/FABRIC MATERIALS POROMETER DESIGN FOR STRETCHED MEMBRANE/FABRIC MATERIALS S Washburn (Intern) J Hughes D Heider S. Washburn (Intern), J. Hughes, D. Heider University of Delaware Center for Composite Materials University of Delaware . Center for Composite Materials SAMPLE HOLDER POROMETER SETUP INTRODUCTION SAMPLE HOLDER POROMETER SETUP Cylinder INTRODUCTION Pressure Cylinder Piston • Porometers are used to measure pore size Pressure R lt Piston • Porometers are used to measure pore size di t ib ti d bilit i b Regulator distribution and permeability in membranes. • Draping in composite manufacturing introduces • Draping in composite manufacturing introduces t t hi ffbi/ b t il P V stretching of fabric/membrane material. P V • GOAL • GOAL • Design a porometer capable of controlled stretching Design a porometer capable of controlled stretching of membrane/fabric material while measuring the of membrane/fabric material while measuring the Porometer with pore size distribution changes Porometer with IMPLEMENTATION sample holder • IMPLEMENTATION • New design includes high-precision measurement • New design includes high precision measurement f th h thi k fl d of through-thickness flow and pressure across A li l d l id k t sample • Applying load on sample induces known geometry sample Ui l h ld i d l d ll i changes of sample leading to fixed stretching/strain • Unique sample holder is developed allowing changes of sample leading to fixed stretching/strain in membrane/fabric stretching of sample during testing in membrane/fabric T t ld ll t f t i stretching of sample during testing • Transparent mold allows measurement of strain • Active measurement area is center area of membrane membrane SUMMARY AND FUTURE PORE SIZE DISTRIBUTION OF FLOW RATE OF WET AND DRY SUMMARY AND FUTURE PORE SIZE DISTRIBUTION OF A TYPICAL MEMBRANE ACKNOWLEDGEMENTS FLOW RATE OF WET AND DRY WORK A TYPICAL MEMBRANE ACKNOWLEDGEMENTS MEMBRANES WORK MEMBRANES This work is Flow Rate of Dry and Wet Membrane • Design of Porometer for stretched Fluid Permeability (HPLC) This work is supported 250 Design of Porometer for stretched samples has been developed 1.0E‐14 of Gore Membrane supported by the Federal samples has been developed. fQ 1.0E 14 by the Federal A i ti 200 RAW (Wet) • Accurate measurement of Q and ∆P 1.0E‐15 Aviation n] Fitted(Wet) is currently being validated 2 ] Administration 150 /min RAW (Dry) is currently being validated • Different sampleholder shapes allow 1.0E‐16 y [m 2 ate [l Fitted(Wet) • Different sampleholder shapes allow i ti i t t hi f t abilit 100 ow Ra variation in stretching factors 1.0E‐17 rmea Fitted Flo • Data reductions has been implemented Pe Weibull 50 to obtain pore size distribution from 1.0E‐18 to obtain pore size distribution from f db k 0 sensor feedback . 1.0E‐19 0 200 400 600 800 1000 1200 1400 Pressure [kPa] • Future work will execute system for 100 1,000 10,000 Pressure [kPa] Pressure [kPa] various materials and stress levels Pressure [kPa] Q Q 1 various materials and stress levels. n n p N f n wet n wet n Q Q Q Q d f , 1 , 4 1 n n n p N f n dry n dry n Q Q d , 1 , 4 n n © 2009 U i it fD l ll i ht d © 2009, University of Delaware, all rights reserved

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Page 1: Porometer Design for Stretched Membrane/Fabric · PDF filePOROMETER DESIGN FOR STRETCHED MEMBRANE/FABRIC MATERIALS S. Washburn (Intern), J. Hughes, D. Heider Washburn (Intern) J

University of Delaware Center for Composite MaterialsUniversity of Delaware . Center for Composite Materials

SAMPLE HOLDERPOROMETER SETUPINTRODUCTION SAMPLE HOLDERPOROMETER SETUPCylinderINTRODUCTION

PressureCylinderPiston

• Porometers are used to measure pore sizePressure R l t

Piston• Porometers are used to measure pore size di t ib ti d bilit i b

Regulatordistribution and permeability in membranes.

• Draping in composite manufacturing introduces• Draping in composite manufacturing introduces t t hi f f b i / b t i l P Vstretching of fabric/membrane material. P V

• GOAL• GOAL• Design a porometer capable of controlled stretchingDesign a porometer capable of controlled stretching of membrane/fabric material while measuring theof membrane/fabric material while measuring the

Porometer withpore size distribution changes Porometer with p gIMPLEMENTATION sample holder

• IMPLEMENTATION p

• New design includes high-precision measurement• New design includes high precision measurement f th h thi k fl dof through-thickness flow and pressure across

A l i l d l i d k tsample • Applying load on sample induces known geometry sampleU i l h ld i d l d ll i changes of sample leading to fixed stretching/strain

• Unique sample holder is developed allowing changes of sample leading to fixed stretching/strain in membrane/fabric

stretching of sample during testingin membrane/fabric

T t ld ll t f t istretching of sample during testing • Transparent mold allows measurement of strain• Active measurement area is center area of membranemembrane

SUMMARY AND FUTUREPORE SIZE DISTRIBUTION OFFLOW RATE OF WET AND DRY SUMMARY AND FUTURE PORE SIZE DISTRIBUTION OF A TYPICAL MEMBRANE ACKNOWLEDGEMENTSFLOW RATE OF WET AND DRY

WORKA TYPICAL MEMBRANE ACKNOWLEDGEMENTSMEMBRANES WORKMEMBRANESThis work isFlow Rate of Dry and Wet Membrane • Design of Porometer for stretchedFluid Permeability (HPLC) This work is supported250

y Design of Porometer for stretched samples has been developed1.0E‐14

of Gore Membrane supported by the Federal

samples has been developed.f Q

1.0E 14

by the Federal A i ti

200 RAW (Wet) • Accurate measurement of Q and ∆P 1.0E‐15 Aviation

( )

Fitted (Wet) is currently being validated2 ]

Administration150/min

( )

RAW (Dry)

is currently being validated• Different sampleholder shapes allow1.0E‐16y [