Improved electrical conductivity of very long multi-walled carbon nanotube bundle/poly (methyl methacrylate) composites |
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Authors: | Jun Seop Kim Shin Je Cho Kwang Seok Jeong Young Chul Choi Mun Seok Jeong |
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Affiliation: | aR&D Center, Hanwha Nanotech, 423-1, Cheongcheon-dong, Bupyeong-gu, Incheon 403-030, Republic of Korea;bAdvanced Photonic Research Institute, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea |
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Abstract: | Very long and highly dispersible multi-walled carbon nanotube (MWCNT) bundles were synthesized in large quantity by catalytic chemical vapor deposition, and their structural and electrical properties were characterized. It was found that the MWCNTs could be synthesized with either bundled (long-aligned) or short-entangled structure depending on the catalyst system. The aligned MWCNTs were found to be more conductive and more dispersible than the entangled ones. The MWCNT/poly (methyl methacrylate) composites were prepared using both entangled and aligned MWCNTs. The aligned MWCNTs were found to give the composite higher electrical conductivity, which might be attributed to long length and high dispersibility. It was further found that the longer the MWCNT bundle, the higher electrical conductivity of the composite. |
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