화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.17, No.11, 863-869, November, 2009
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Effect of Multi-walled Carbon Nanotube Dispersion on the Electrical, Morphological and Rheological Properties of Polycarbonate/Multi-walled Carbon Nanotube Composites
Mi Sun Han, Yun Kyun Lee, Woo Nyon Kim†, Heon Sang Lee1, Jin Soo Joo2, Min Park3, Hyun Jung Lee3, and Chong Rae Park4
  • Department of Chemical and Biological Engineering, Korea University, Seoul 136-713, Korea
  • 1Department of Chemical Engineering, Dong-A University, Busan 604-714, Korea
  • 2Department of Physics, Korea University, Seoul 136-701, Korea
  • 3Hybrid Materials Research Center, Korea Institute of Science and Technology, Seoul 130-650, Korea
  • 4Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
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The effect of a multiwalled carbon nanotube (MWCNT) dispersion on the electrical, morphological and rheological properties of polycarbonate (PC)/MWCNT composites was investigated, with and without pretreating the MWCNTs with hydrogen peroxide oxidation and lyophilization. The resulting PC/treated MWCNT composites showed higher electrical conductivity than the PC/untreated MWCNT composites. The morphological behavior indicated the treated composites to have greater dispersion of MWCNTs in the PC matrix. In addition, the electromagnetic interference shielding efficiency (EMI SE) of the treated composites was higher than that of the untreated ones. Rheological studies of the composites showed that the complex viscosity of the treated composites was higher than the untreated ones due to increased dispersion of the MWCNTs in the PC matrix, which is consistent with the electrical conductivity, EMI SE and morphological studies of the treated composites. The latter results suggested that the increased electrical conductivity and EMI SE of the treated composites were mainly due to the increased dispersion of MWCNTs in the PC matrix.
Keywords:polycarbonate/carbon nanotube composites;dispersion;electrical property;rheology;morphology
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