Electrically conductive carbon nanotube/ultrahigh molecular weight polyethylene composites with segregated and double percolated structure

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• 作者：Huan Pang^a ; Chen Chen^b ; Yu Bao^a ; Jun Chen^a ; Xu Ji^a ; Jun Lei^a ; Zhong-Ming Li^a ; ^{zmli@scu.edu.cn}
• 关键词：Carbon nanotubes ; Polymeric composites ; Electrical properties ; Microstructure
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 July, 2012
• 卷：79
• 期：Complete
• 页码：96-99
• 文件大小：1357 K

摘要

This article reports a novel percolation mechanism in carbon nanotube (CNT)/polyethylene composites with combined segregated and double percolated structure, in which the CNTs form conductive networks in high-density polyethylene (HDPE) and the CNT/HDPE component forms continuous conductive layers at the interface between the ultrahigh-molecular-weight polyethylene granules. The combination of segregated and double percolated structures achieved an ultralow percolation of 0.049 vol.%CNT. Morphological studies and the determination of the critical exponent t value obtained from the classical threshold mechanism indicate the formation of a three-dimensional conductive network. This work provides a guideline for the easy fabrication of high performance CPCs with an ultralow percolation threshold.