Electrically conductive polymer nanocomposites of polymethylmethacrylate and carbon nanofibers prepared by chaotic mixing
Electrically conductive polymer nanocomposites of polymethylmethacrylate and carbon nanofibers prepared by chaotic mixing
复制标题
DOI：
10.1016/j.compositesa.2006.06.017
复制
发表时间：
2007-01-01
影响因子：
8.7
通讯作者：
Jana, Sadhan C.
中科院分区：
文献类型：
--
作者：
Jimenez, Guillermo A.;Jana, Sadhan C.
在低剪切混沌混合器中制备了聚甲基丙烯酸甲酯/碳纳米纤维导电复合材料。这些材料显示出约2重量%的逾渗阈值。CNF与6重量%相比对于在密炼机中在平均剪切速率的可比条件下制备的材料。在通过混沌混合制备的材料中发现，纳米纤维从束中拉出并沿流动方向沿着取向以产生导电网络。电导率表现出很大的敏感性，渗流阈值附近的混合时间，并保持几乎不变，与长期的混沌混合渗流阈值以上。研究了复合材料的热性能、热机械性能和力学性能。(c)2006爱思唯尔有限公司保留所有权利。
Electrically conductive composites of poly(methyl methacrylate) and carbon nanofibers (CNF) were prepared in a low-shear chaotic mixer. These materials showed a percolation threshold of approximately 2 wt.% CNF compared to 6 wt.% for materials prepared in an internal mixer under comparable conditions of mean shear rate. It was found in materials prepared by chaotic mixing that nanofibers were pulled out of the bundles and oriented along the flow directions to produce electrically conductive networks. Electrical conductivity showed great sensitivity to mixing time around percolation threshold and remained almost unchanged with prolonged chaotic mixing above the percolation threshold. Thermal, thermo-mechanical and mechanical properties of the composites were investigated. (c) 2006 Elsevier Ltd. All rights reserved.