A Novel Polyimide Dispersing Matrix for Highly Electrically Conductive Solution-Cast Carbon Nanotube-Based Composite
A Novel Polyimide Dispersing Matrix for Highly Electrically Conductive Solution-Cast Carbon Nanotube-Based Composite
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DOI：
10.1021/cm200909x
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发表时间：
2011-08
影响因子：
8.6
通讯作者：
W. Yuan;Jianfei Che;M. Chan-Park
中科院分区：
文献类型：
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作者：
W. Yuan;Jianfei Che;M. Chan-Park
多壁碳纳米管（MWNTs）具有高的本征电导率，被认为是导电复合材料的理想填料。然而，到目前为止，由于纳米管的分散性差和负载量低，简单的溶液浇铸或纳米管的共混在生产高导电复合材料方面还不是非常成功。我们表明，通过使用一种新的聚酰胺酸（PAA）含有一个刚性的骨干与羟基侧基，作为纳米管分散剂和基体前体，我们可以增加纳米管的含量在溶液浇铸聚酰亚胺（PI）为基础的复合材料高达30重量%，并实现高的复合材料的导电性以及高的机械性能。MWNT/PI复合材料的电导率达到38.8 S cm-1的值在纳米管负载量为30重量%和MWNT浓度为0.48重量%，以达到复合材料的导电渗流阈值。这些分别是最高和最低的R...
Multiwalled carbon nanotubes (MWNTs) have high intrinsic conductivities and are thought to be ideal fillers for electrically conductive composites. However, so far, simple solution casting or blending of nanotubes has not been highly successful in producing highly conductive composites, because of the poor dispersion and low loading of the nanotubes. We show that, by using a novel poly(amic acid) (PAA) containing a rigid backbone with hydroxyl pendant groups, as both the nanotube dispersant and the matrix precursor, we can increase the nanotube content in the solution-cast polyimide (PI)-based composite to as high as 30 wt % and achieve ultrahigh composite electrical conductivity as well as high mechanical properties. The electrical conductivity of the MWNT/PI composites reaches a value of 38.8 S cm–1 at a nanotube loading of 30 wt % and the MWNT concentration for achieving the percolation threshold of conductivity of the composites is 0.48 wt %. These are, respectively, the highest and among the lowest r...