Nano size additives 1

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

TYPICAL EXAMPLE FOR PMG

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PEO+CACL2 IN METHENOL K2CO3 IN WATER

WASH,PPT,DRY.

NANO

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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