Download - Nano size additives 1
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NANO-SIZE ADDITIVES:NANO-SIZE ADDITIVES:FUNCTIONAL MATERIALSFUNCTIONAL MATERIALS
RAVI NARAIAN PANDEY
MTECH (POLYMER)
IST YEAR
ROLL NO PST/05/10
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ORIGIN OF NANOCOMPOSITE
Toyota central research labs in Japan teamed up with ube industries ltd, a Japanese resin supplier to produce a new composite polymer, consisting of Nylon-6 interspersed with layers of montmorillonite.
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IMPORTANCE OF NANO FILLER AND COMPOSITE
• “NANO” Appears to be the catch word today.• Why?• It has led to new developments of Materials
science ,Polymer science ,Electronics and Bio – Engineering, etc.• Same materials can be engineered for new
properties :dramatic changes can be obtained by reducing the size.
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SIZE DEPENDENT PROPERTIES OF MATERIALS
• Material behave differently in form of Nano-size, Thin Films etc.
• Size dependency of Electrical and Mechanical ,and Optical Properties.
• Quantum size effects .• Structural changes induced by such
dimensional control----Mechanical props.• Very high surface area made available.
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Nano –size of the particles leades to more exposure of the high energy edges where atoms are “DANGLING”.
NANO FILLERS ARE DIFFERENT!!
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There are different types of molecular structures/assemblies possible.
NANO FILLERS ARE DIFFERENT!!
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METHODS OF SYNTHESIS FOR NANO –FILLERS FOR COMPOSITES:
• IN-SITU INTERCALATED POLYMERISATION.• EXFOLIATION -ADSORPTION METHOD. • MELT INTERCALATION.• POLYMER MEDIATED GROWTH .
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EXFOLIATION OF MINERALS
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NANO CLAY COMPOSITE
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TYPICAL DOWN SIZING OF NATURAL MATERIAL
• Different types of clays.• Different types of mica.• Wollastonite .• Celite.
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POLYMER MEDIATED GROWTH
• Polymers/ complexing chemicals can control the growth of crystals in certain direction.
• Polymer can be used as substrates.• Polymers can be templates.• Polymers complexed with reactants give
control over size.• Polymer blends are even better for down
sizing.
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POLYMER MEDIATED GROWTH FOR SYNTHESIS OF NANO PARTICULATE ADDITIVES
NANO PARTICLES
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POLYMER +RECTANT-1.COMPLEXED
FORMED
REACTANT-2
NEW CRYSTAL SHAPES STRUCTURE
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TYPICAL EXAMPLE FOR PMG
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PEO+CACL2 IN METHENOL K2CO3 IN WATER
WASH,PPT,DRY.
NANO
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APPLICATION OF NANOFILLERS IN PLASTICS INDUSTRY
• Dispersion and coating.• Special films with high barrier properties,
optical properties, rust prevention,etc.• Functional additive for plastics molded parts.• Compounding with other plastics.
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IMPROVED PROPERTIES
• BARRIER PROPERTIES: For packaging and containers.
• MECHANICAL PROPERTIES: For automotive compounds.
• OPTICAL PROPERTIES: For coating, glazing, solar panels.
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• ELECTRICAL CONDUCTIVITY: For batteries, fuel cells, mobile phones, electronic devices.
• CORROSION RESISTANCE: For smart coating.
• FIRE RETARDING EFFECT: For composite panels, cables.
IMPROVED PROPERTIES
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SPECILIZED APPLICATION FOR AUTOMOTIVE SECTOR
• IMPROVED MECHANICAL PROPERTIES AT LOW ADDITIVE CONCENTRATION: Dashboards, bumpers, handles, interiors.
• IMPROVED BARRIER PROPERTIES: Paints, coatings, fuel tanks, solution containers.
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• IMPROVED OPTICAL PROPERTIES: Hard coating.trasperency in films.
• BETTER FLAME RETARDING: Eco friendly additives.
• HIGH TECH DEVICES: Sensors, micro devices.
SPECILIZED APPLICATION FOR AUTOMOTIVE SECTOR
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