纳米MgO/低密度聚乙烯高压直流电缆复合材料的制备与性能  

Preparation and properties of nano MgO/low density polyethylene composites for high-voltage direct current cables

作　　者：王思蛟 巫运辉 查俊伟[1,2] 吴东红[1] 党智敏[1,3] 

机构地区：[1]北京科技大学高分子科学与工程系,北京100083 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [3]清华大学电机工程系,电力系统国家重点实验室,北京100084

出　　处：《复合材料学报》2016年第6期1179-1185,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51207009);国家“973”计划(2014CB239501);输配电装备及系统安全与新技术国家重点实验室访问学者项目(2007DA10512714407);北京市科技计划(Z13110300590000)

摘　　要：通过热处理方法得到表面不含羟基(—OH)的纳米MgO颗粒,采用母料法制备了10wt%纳米MgO/低密度聚乙烯(LDPE)复合材料,研究了纳米MgO/LDPE复合材料在70kV/mm直流电场下的空间电荷特性,评估了该方法对纳米颗粒分散的效果及工业化应用推广价值。结果表明:表面羟基化对纳米MgO/LDPE复合材料变温体积电阻率及介电特性的影响不大,空间电荷积累量增加。当纳米MgO掺杂量为1wt%时,复合材料的电性能最佳。Nano MgO particles without hydroxyl group （—OH）on surface were prepared through hydrothermal method,and 10wt% MgO/low density polyethylene （LDPE）composites were prepared by master batch method. The space charge characteristics of nano MgO/LDPE composites under 70 kV/mm direct current fields were stud-ied.The dispersion effect of nanoparticles and the application promotional value in industry of this method were also evaluated.The results show that the effects of surface hydroxy on variable temperature volume resistivity and dielec-tric properties of nano MgO/LDPE composites were not remarkable,while space charge accumulates increase.When the concentration of nano MgO is 1 wt%,composite presentes the excellent electrical properties.

关 键 词：低密度聚乙烯 纳米MgO 母料法 空间电荷 直流电缆 

分 类 号：TM854[电气工程—高电压与绝缘技术]