1. By Israel Chavez Sumarriva
Review Paper Presentation
Composites of Single wall Carbon nanotubes and Polymer latice of Styrene
By Israel Chavez Sumarriva
Fundamentals of Nanotechnology, Chem E 5480
December 1st, 2007

2. Background 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-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

3. 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.

4. Common method to encapsulate
Emulsion polymerization
Micro
< 100 nm
Mini
100 – 500 nm
Macro
> 500 nm
Common method to encapsulate
inorganic particles

5. Mixing dispersed components
SWNT dispersed in surfactant
Latex (product of macro or miniemulsion)

6. Procedure of mixing method
SWNTs SDBS solution sonication
Stir 20 min
Latex
(product of (mini)emulsion polymerization)
Evaporate water
Solid
Soxhlet extraction of SDBS using propanol
120 h
Sample
Compression
Molding

9. Procedure of mixing method
SWNTs SDBS solution sonication
Stir 20 min
Latex
(product of (mini)emulsion polymerization)
Evaporate water
Solid
Soxhlet extraction of SDBS using propanol
120 h
Sample
Compression
Molding

11. Procedure of mixing method
SWNTs SDBS solution sonication
Stir 20 min
Latex
(product of (mini)emulsion polymerization)
Evaporate water
Solid
Soxhlet extraction of SDBS using propanol
120 h
Sample
Compression
Molding

13. Procedure of mixing method
SWNTs SDBS solution sonication
Stir 20 min
Latex
(product of (mini)emulsion polymerization)
Evaporate water
Solid
Soxhlet extraction of SDBS using propanol
120 h
Sample
Compression
Molding

15. Procedure of mixing method
SWNTs SDBS solution sonication
Stir 20 min
Latex
(product of (mini)emulsion polymerization)
Evaporate water
Solid
Soxhlet extraction of SDBS using propanol
120 h
Sample
Compression
Molding

17. 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

18. GRACIAS
THANK YOU
GRACIAS
THANK YOU