Singlewall carbon nanotubes covered with polystyrene nanoparticies by in-situ miniemulsion polymerization

This work is to make carbon nanotubes dispersible in both water and organic solvents without oxidation and cutting nanotube threads. Polystyrene-singlewall carbon nanotube (PS-SWNT) composites were prepared with three different methods: miniemulsion polymerization, conventional emulsion polymerization, and mixing SWNT with PS latex. The two factors, crosslinking and surface coverage of PS are important factors for the mechanical and electrical proper-ties, including dispersion states of SWNT in various solvents. The PS-SWNT composite prepared via a conventional emulsion polymerization showed SWNT bundles entirely covered with PS, whereas the PS-SWNT composite prepared via a miniemulsion polymerization showed SWNT partially covered with crosslinked PS nanoparticles. The method of mixing SWNTs with PS latex did not show the well dispersed state of carbon nanotubes because PS was not crosslinked and was dissolved in a solvent, and nanotubes separated from PS precipitated. So the PS nanoparticle-SWNT composite had lower electrical resistance, and higher mechanical strength than the other composites made by the latter two methods. As the amount of SWNT increases, the bare surface area of SWNT increases and the electrical conductivity increases in the composite made by the miniemulsion polymerization. (c) 2005 Wiley Periodicals, Inc.
Publisher
Wiley-Blackwell
Issue Date
2006-01
Language
ENG
Keywords

STYRENE MICROEMULSION POLYMERIZATION; SODIUM DODECYL-SULFATE; FUNCTIONALIZATION; DISPERSIONS; COMPOSITES; NUCLEATION; PARTICLES; POLYMERS

Citation

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.44, no.1, pp.573 - 584

ISSN
0887-624X
DOI
10.1002/pola.21185
URI
http://hdl.handle.net/10203/87453
Appears in Collection
CBE-Journal Papers(저널논문)
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