中国塑料 ›› 2013, Vol. 27 ›› Issue (10): 23-26 .DOI: 10.19491/j.issn.1001-9278.2013.10.005

• 材料与性能 • 上一篇    下一篇

超高相对分子质量聚乙烯/石墨烯微片复合材料的导电行为研究

杨建锋 季铁正 张教强 郑星卓 谷敬凯 李萍   

  1. 西北工业大学长安校区理学院 西北工业大学理学院应用化学系 西北工业大学理学院化学系 西北工业大学
  • 收稿日期:2013-07-16 修回日期:2013-09-09 出版日期:2013-10-26 发布日期:2013-10-26

Electrically Conductive Properties of Ultrahigh Molecular Weight Polyethylene/Graphene Nanoplatelets Composites

Jiao-qiang ZHANG   

  • Received:2013-07-16 Revised:2013-09-09 Online:2013-10-26 Published:2013-10-26

摘要: 采用溶液混合、超声波分散的方法制备了超高相对分子质量聚乙烯(PEUHMW)/石墨烯微片(GNPs)复合材料,研究了PEUHMW/GNPs复合材料的导电行为和阻温特性。结果表明,本方法可以使GNPs在PEUHMW基体中良好地分散;复合材料表现出典型的导电渗流行为,渗流阈值为2.8 %(质量分数,下同);在高于渗流阈值的情况下,PEUHMW/GNPs复合材料的正温度系数效应(PTC)强度随GNPs含量的增加而减小,在渗流阈值附近复合材料的PTC强度最高;PEUHMW/GNPs复合材料的阻温特性重复性较好,多次热循环后PTC强度趋于稳定。

关键词: 石墨烯微片, 超高相对分子质量聚乙烯, 导电复合材料, 正温度系数效应

Abstract: Ultrahigh molecular weight polyethylene (PEUHMW)/graphene nanoplatelets(GNPs) composites were prepared through solution blending and ultrasonic dispersion, and their electrical properties were investigated. SEM showed that GNPs were well distributed in PEUHMW, and the composites had a typical percolation behavior with a threshold of 2.8 wt %. With increasing GNPs contents, positive temperature coefficient (PTC) intensity of the composites gradually decreased. Thermal cycles decreased PTC intensity.

Key words: graphene nanoplatelets, high molecular weight polyethylene, conductive composite, positive temperature coefficient