writer：Jinrui Huang, Yutian Zhu, Wei Jiang, Qingxin Tang
keywords：聚合物基复合材料, 电学性能, 各向异性, 流变性能, 碳纳米管条纹
source：期刊
specific source：Composites Part A: Applied Science and Manufacturing, 2015, 69, 240-246
Issue time：2015年

摘要：已知剪切流可诱导单元在受限几何中组装成沿涡度方向排列的条纹结构。本文表明，通过调节分散相与连续相之间的黏度比，可有效调控聚合物薄膜中条纹的微结构和性能。采用微型混炼机将十八胺功能化多壁碳纳米管（ODA-MWCNTs）分别预混入PP或SEBS，制备了具有不同黏度比的聚丙烯（PP）/聚苯乙烯-乙烯/丁二烯-苯乙烯（SEBS）/ODA-MWCNTs复合材料。在剪切流诱导下，所有不同黏度比复合材料的ODA-MWCNTs和SEBS均在PP薄膜中自发组装成沿涡度方向排列的条纹，使薄膜具有导电各向异性。有趣的是，由不同黏度比复合材料制备的PP薄膜中MWCNT条纹的微结构和电学性能存在显著差异。

Abstract：It is known that shear-flow can induce units to assemble into vorticity-aligned stripe-structures in confined geometries. This study shows that the microstructure and the property of the stripe in polymer thin film can be well tuned by adjusting the viscosity ratio between dispersed phase and continuous phase. Polypropylene (PP)/poly(styrene-ethylene/butadiene-styrene) (SEBS)/octadecylamine functionalized multiwalled carbon nanotubes (ODA-MWCNTs) composites with different viscosity ratios were prepared by either pre-compounding ODA-MWCNT into PP or SEBS in a microcompounder. Under the induction of shear-flow, ODA-MWCNT and SEBS spontaneously assembled into vorticity-aligned stripes in PP thin films for all the composites with different viscosity ratios, resulting in the property of conductive anisotropy for the film. Interestingly, it was found that both the microstructures and the electrical properties of MWCNT stripes in PP thin films prepared from the composites with different viscosity ratios were significantly different.

论文链接：https://doi.org/10.1016/j.compositesa.2014.11.023