A Nano-size Particle Sampler using a Differential Mobility ...
Nano size additives 1
-
Upload
ravi-naraian-pandey -
Category
Technology
-
view
1.115 -
download
4
description
Transcript of 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
1
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.
2
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.
3
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.
4
Nano –size of the particles leades to more exposure of the high energy edges where atoms are “DANGLING”.
NANO FILLERS ARE DIFFERENT!!
5
6
There are different types of molecular structures/assemblies possible.
NANO FILLERS ARE DIFFERENT!!
7
METHODS OF SYNTHESIS FOR NANO –FILLERS FOR COMPOSITES:
• IN-SITU INTERCALATED POLYMERISATION.• EXFOLIATION -ADSORPTION METHOD. • MELT INTERCALATION.• POLYMER MEDIATED GROWTH .
8
EXFOLIATION OF MINERALS
9
NANO CLAY COMPOSITE
10
TYPICAL DOWN SIZING OF NATURAL MATERIAL
• Different types of clays.• Different types of mica.• Wollastonite .• Celite.
11
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.
12
POLYMER MEDIATED GROWTH FOR SYNTHESIS OF NANO PARTICULATE ADDITIVES
NANO PARTICLES
13
POLYMER +RECTANT-1.COMPLEXED
FORMED
REACTANT-2
NEW CRYSTAL SHAPES STRUCTURE
TYPICAL EXAMPLE FOR PMG
14
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.
15
IMPROVED PROPERTIES
• BARRIER PROPERTIES: For packaging and containers.
• MECHANICAL PROPERTIES: For automotive compounds.
• OPTICAL PROPERTIES: For coating, glazing, solar panels.
16
• ELECTRICAL CONDUCTIVITY: For batteries, fuel cells, mobile phones, electronic devices.
• CORROSION RESISTANCE: For smart coating.
• FIRE RETARDING EFFECT: For composite panels, cables.
IMPROVED PROPERTIES
17
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.
18
• 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
19
20