Electrical percolation networks of carbon nanotubes in a shear flow

被引：27
|
作者：
Kwon, Gyemin [1 ]
Heo, Youhee [1 ]
Shin, Kwanwoo [1 ]
Sung, Bong June [1 ]
机构：
[1] Sogang Univ, Dept Chem, Seoul 121742, South Korea
来源：
PHYSICAL REVIEW E | 2012年 / 85卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
CONTINUUM PERCOLATION; CONDUCTIVITY; COMPOSITES; RHEOLOGY; TRANSPARENT; SUSPENSIONS; SUBJECT; STICKS; FILMS;
D O I：
10.1103/PhysRevE.85.011143
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The effect of shear on the electrical percolation network of carbon nanotube (CNT)-polymer composites is investigated using computer simulations. Configurations of CNTs in a simple shear, obtained by using Monte Carlo simulations, are used to locate the electrical percolation network of CNTs and calculate the electric conductivity. When exposed to the shear, CNTs align parallel to the shear direction and the electrical percolation threshold CNT concentration decreases. Meanwhile, after a certain period of the shear imposition above a critical shear rate, CNTs begin to form an aggregate and the percolating network of CNTs is broken, thus decreasing the electric conductivity significantly. We also construct quasiphase diagrams for the aggregate formation and the electrical percolation network formation to investigate the effect of the shear rate and CNT concentration.
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页数：5
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