writer：Jinrui Huang, Yutian Zhu, Wei Jiang, Jinghua Yin, Qingxin Tang, Xiaodong Yang
keywords：导电各向异性, 碳纳米管, 剪切流, 分级组装, 薄膜
source：期刊
specific source：ACS Applied Materials & Interfaces, 2014, 6(3), 1754-1758
Issue time：2014年

摘要：在前期提出的剪切流诱导二维填料（十八胺功能化石墨烯）在聚合物基体中形成有序平行条纹的方法基础上，本文将这一方法拓展到一维多壁碳纳米管（MWCNTs）。在剪切流诱导下，分散的聚苯乙烯-乙烯/丁二烯-苯乙烯（SEBS）相与MWCNTs可在聚丙烯（PP）薄膜中自发组装成有序平行条纹。电学测试表明，沿条纹平行方向的电阻率比垂直方向低约6个数量级，是目前塑料各向异性导电材料中最显著的导电各向异性。此外，MWCNT条纹的尺寸以及所得各向异性导电薄膜的电学性能可通过剪切池间隙有效调控。

Abstract：In a previous study, a novel method was proposed to fabricate anisotropic conductive materials through shear-flow-induced hierarchical self-assembly of two-dimensional fillers into well-ordered parallel stripes in a polymer matrix. In this study, the method is extended to one-dimensional multiwalled carbon nanotubes (MWCNTs). Under the induction of shear flow, the dispersed poly(styrene ethylene/butadiene-styrene) (SEBS) phase and MWCNTs spontaneously assemble into well-ordered parallel stripes in the polypropylene (PP) thin film. The electrical resistivity in the direction parallel to the stripes is almost 6 orders of magnitude lower than that in the perpendicular direction, which is by far the most striking conductive anisotropy for plastic anisotropic conductive materials. The size of the MWCNT stripes as well as the electrical property of the resulting anisotropic conductive thin film can be well controlled by the gap of the shear cell.

论文链接：https://doi.org/10.1021/am404758d