作者：Jinrui Huang, Junbao Xu, Yuping Sheng, Yutian Zhu, Wei Jiang, Donghua Xu, Qingxin Tang, Xiaoan Nie
关键字：导电各向异性, 涡度方向条纹, 剪切流诱导组装, 炭黑, 聚合物薄膜
论文来源：期刊
具体来源：Macromolecular Materials and Engineering, 2016, 301(6), 743-749
发表时间：2016年

摘要：通过剪切流诱导组装制备了各向异性导电薄膜（ACF）。研究发现，形成有序平行涡度方向条纹需要适量的碳质填料，且所需含量取决于填料种类。有趣的是，长径比最低、电导率也最低的炭黑（CB）是制备ACF的最佳候选。具有CB条纹的薄膜表现出优异的导电各向异性：平行于CB条纹方向的电阻率比垂直方向低近8个数量级。还通过流变测量和形貌演化研究考察了涡度方向条纹的形成机理，发现分散相或聚集体合并主导了条纹的形成与生长，第一法向应力差为负值驱动条纹沿涡度方向排列。

Abstract：In this work, anisotropic conductive film (ACF) is fabricated by shear-flow induced assembly. It is found that an appropriate content of carbonaceous filler is needed for forming well-ordered parallel vorticity-aligned stripes and the content depends on the category of the filler. Interestingly, the lowest aspect ratio carbon black (CB) with lowest electrical conductivity is the best candidate for fabricating ACF. The film with CB stripes shows excellent conductive anisotropy: the electrical resistivity in the direction parallel to the CB stripes is almost eight orders of magnitude lower than that in the perpendicular direction. The formation mechanism of the vorticity-aligned stripe is also investigated by the rheological measurement and the study of morphological evolution. It is found that the coalescence of dispersed phase or aggregates dominates the formation and growth of the stripe and negative value of the first normal stress difference drives the stripe to align along the vorticity direction.

论文链接：https://doi.org/10.1002/mame.201600026