期刊
CARBON
卷 48, 期 13, 页码 3846-3857出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2010.06.050
关键词
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资金
- NSF [GOALI 0758251]
- Boeing Company
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0758251] Funding Source: National Science Foundation
The influence of low cost, commercially oxidized carbon nanofibers (ox-CNFs) on the morphological, thermal, mechanical and electrical properties of polycarbonate (PC) composites was examined. Using a simple solution mixing process leads to good dispersion and high packing density of CNFs in the resultant composites. The composite materials exhibit a dramatic improvement in the DC conductivity; for example, increasing from 2.36 x 10(-14) S/m for PC to ca. 10(-2) S/m for the composite at only 3.0 wt.% of CNFs, and exhibits a very fast static charge dissipation rate. Dynamic mechanical analysis showed a remarkable increase in storage modulus (282%) at 165 degrees C, compared to pure PC. Thermogravimetric analysis showed that thermal stability of the composites increased by 54 degrees C compared to the pure PC. To our knowledge, the measured electrical conductivity and thermal properties for PC/CNF are the highest values yet reported for PC/CNF composites at comparable loadings. The AC/DC conductivity is shown to play an important role to predict the state of dispersion. (C) 2010 Elsevier Ltd. All rights reserved.
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