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Thermal and Electrical Properties of PS/MWCNT Composite Prepared by Solution Mixing: Effect of Surface Modification of MWCNT  

Park, Eun-Ju (Department of Chemical Engineering, Inha University)
Lee, Jeong-Woo (Department of Chemical Engineering, Inha University)
Jung, Dong-Soo (Department of Mechanical Engineering, Inha University)
Shim, Sang-Eun (Department of Mechanical Engineering, Inha University)
Publication Information
Elastomers and Composites / v.45, no.1, 2010 , pp. 17-24 More about this Journal
Abstract
Herein, the effect of the dispersion uniformity of the multi-wall carbon nanotube (MWCNT) on the thermal and electrical conductivity of polystyrene (PS)/MWCNT composite was investigated. The PS/MWCNT composites were prepared by solution mixing from dispersions of various MWCNTs in PS/tetrahydrofuran (THF) solution. Three types of MWCNTs were used; pristine MWCNT, hydroxyl functionalized MWCNT, which was functionalized with $KMnO_4$ in the presence of a phase transfer catalyst at room temperature, and pristine MWCNT with BYK-9077 as a dispersant. It was found that the stable dispersion state of MWCNT in PS/THF solutions significantly improved the thermal and electrical conductivity of the ultimate composites. It is noted that the thermal and electrical conductivity of PS/3 wt% pristine MWCNT composite with BYK-9077 were about 9.4 and 30~50% higher than those of PS/3 wt% pristine MWCNT composite, respectively.
Keywords
carbon nanotube; polystyrene; composite; thermal conductivity; electrical conductivity;
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