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Comparative study on electrical properties of orientated carbon nanotubes/epoxy composites
Author(s) -
Dai Jianfeng,
Wang Junhong,
Mu Xiaowen,
Chen Xiaoting
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.35025
Subject(s) - percolation threshold , epoxy , materials science , composite material , carbon nanotube , percolation (cognitive psychology) , composite number , conductivity , aspect ratio (aeronautics) , percolation theory , electrical resistivity and conductivity , chemistry , neuroscience , electrical engineering , biology , engineering
The percolation threshold of carbon nanotubes (CNTs)/epoxy resin composites was simulated in the Bruggeman' Effective‐Medium Theory based on experiment. Both distinct percolation effect and low percolation threshold in the aligned CNTs/epoxy composites were predicted. With the CNTs loading larger than the percolation threshold, the critical exponent of CNTs/epoxy composites rises rapidly with the increase of aspect ratio of CNTs. It is shown that the electrical conductivity of composites presents distinct aeolotropism, the percolation threshold is sensitive relative to the tiny change of the orientation factor, the aspect ratio, and the structure of CNTs in the composites matrix. The simulated results are consistent with the experimental results basically, and the discrepancy between simulated results and experimental results has been interpreted reasonably. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012