三明治结构氧化铝/低密度聚乙烯纳米复合材料的电性能研究  

Electrical Properties of Sandwich-structured Alumina/Low Density Polyethylene Nanocomposites

作　　者：王思蛟 查俊伟[1] 王颖[1] 王俊甫[1] 党智敏[1,2] 

机构地区：[1]北京科技大学高分子科学与工程系,北京100083 [2]清华大学电机工程与应用电子技术系,北京100084

出　　处：《绝缘材料》2016年第11期21-25,共5页Insulating Materials

基　　金：国家自然科学基金资助项目(51207009;51377010;51425201);国家重点基础研究发展计划项目(973计划)(2014CB239501)

摘　　要：采用熔融共混和多层热压的方法制备了4种三明治结构的氧化铝/低密度聚乙烯(Al2O3/LDPE)纳米复合材料。利用电声脉冲法测试了复合材料短路时的空间电荷消散曲线,通过电流测试平台研究了复合材料在常温不同直流电场下的电导率变化。结果表明:三明治结构Al2O3/LDPE复合材料的电荷消散速度明显高于纯LDPE,且在高电场下其电导率小于纯LDPE。这是由于通过三明治结构较大程度地将深陷阱引入到LDPE复合材料表面,有效抑制了电荷的注入。Four kinds of alumina/low density polyethylene （A12OJLDPE） nanocomposites with sandwich structure were prepared by melt blending and multi-layered hot pressing technology. Their space charge decay curves after short out were tested through pulsed electro-acoustic method, and their conductivity under different DC electric field were measured on the current test platform at room temperature. The results show that the charge decay rate of the sandwich-structured A1203fLDPE nanocomposites is higher than that of pure LDPE, and the conductivity of the sandwich-structured AI203fLDPE nanocomposites is lower than that of pure LDPE at high field. This is because the sandwich structure could introduce deep traps to the surface of LDPE nanocomposites, and then the charge was effectively inhibited.

关 键 词：低密度聚乙烯 三明治结构 纳米复合材料 空间电荷 电导 

分 类 号：TM215[一般工业技术—材料科学与工程] TQ325.12[电气工程—电工理论与新技术]