Composites of Single wall Carbon nanotubes and

Polymer latice of Styrene

By Israel Chavez Sumarriva

Fundamentals of Nanotechnology, Chem E 5480 December 1st, 2007

Review Paper Presentation

Background and IntroductionBackground and Introduction

In 1991, Iijima discovered carbon nanotubes with the exceptional properties such as excellent mechanical strength and optical properties, high electrical and thermal conductivities.

Single Wall Carbon-NanotubesSingle Wall Carbon-Nanotubes

- Reported results: Young’s modulus ~ 1000 GPa (100x Kevlar, tensile strength ~ 30 GPa (10x Kevlar)- Can be conductive or semiconductive- High thermal conductivity (10x copper)- Disperse SWNTs in polymers using a dispersing

agent

http://www.nanotech-now.com/images

Surfactants can disperse SWNTs in aqueous solution without forming chemical bonds with the tubes not affect the tube properties.

Emulsion

Are systems in which liquid droplets (discontinuous phase) are dispersed in an immiscible liquid (continuous phase). However, for the system to be stable enough to be called an “emulsion” , the emulsifying agent, which usually is a surface active agent, must be present.

Emulsion polymerization

Micro Mini Macro

Common method to encapsulate inorganic particles

< 100 nm 100 – 500 nm > 500 nm

SWNT dispersed in surfactant

Latex (product of macro or miniemulsion)

Mixing dispersed components

Procedure of mixing methodSWNTs

SDBS solutionsonication

Stir 20 minLatex

(product of (mini)emulsion polymerization)

Evaporate water

SolidSoxhlet extraction of SDBS using propanol

120 h

Sample

CompressionMolding

Procedure of mixing methodSWNTs

SDBS solutionsonication

Stir 20 minLatex

(product of (mini)emulsion polymerization)

Evaporate water

SolidSoxhlet extraction of SDBS using propanol

120 h

Sample

CompressionMolding

Procedure of mixing methodSWNTs

SDBS solutionsonication

Stir 20 minLatex

(product of (mini)emulsion polymerization)

Evaporate water

SolidSoxhlet extraction of SDBS using propanol

120 h

Sample

CompressionMolding

Procedure of mixing methodSWNTs

SDBS solutionsonication

Stir 20 minLatex

(product of (mini)emulsion polymerization)

Evaporate water

SolidSoxhlet extraction of SDBS using propanol

120 h

Sample

CompressionMolding

Procedure of mixing methodSWNTs

SDBS solutionsonication

Stir 20 minLatex

(product of (mini)emulsion polymerization)

Evaporate water

SolidSoxhlet extraction of SDBS using propanol

120 h

Sample

CompressionMolding

Future Directions:

Well. If we want to make this process as industrial scale, We need to change the extraction of SDBS by Soxhlet because soxhlet process is not practical a big scale with another process. I’m working using membranes instead of Soxhlet

GRACIAS

THANK YOU

GRACIAS

THANK YOU