微米氧化铝表面修饰对电工级环氧树脂电绝缘性能的影响  

Effect of Surface Modification for Micro-Al_2O_3 on Insulating Properties of Epoxy Resin of Electrical Grade

作　　者：孔令龙 褚鹏飞[2] 张晖[2] 张忠[2] 隋刚[1] 杨小平[1] KONG Linglong;CHU Pengfei;ZHANG Hui;ZHANG Zhong;SUI Gang;YANG Xiaoping(State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China)

机构地区：[1]北京化工大学有机无机复合材料国家重点实验室,北京100029 [2]国家纳米科学中心中国科学院纳米系统与多级次制造实验室,北京100190

出　　处：《绝缘材料》2018年第6期35-41,共7页Insulating Materials

基　　金：国家高技术研究发展计划(863计划)项目(2013AA031803);中科院战略性先导科技专项(XDA09030200)

摘　　要：采用4种不同的硅烷偶联剂对微米氧化铝颗粒进行表面修饰,制备了微米氧化铝/环氧树脂复合材料。研究了不同表面修饰的微米氧化铝颗粒对环氧树脂体积电阻率、电气强度、介电常数及介质损耗因数的影响规律,通过热刺激电流实验分析了材料的陷阱性质。结果表明:不含极性基团的短链硅烷偶联剂对微米颗粒的修饰效果最好,复合材料的绝缘性能随着微米颗粒的极性降低而升高,复合材料内部陷阱深度的增加可能是其绝缘性能提高的原因。Micro-Al2O3 particles were surface modified by four kinds of coupling agents, and the micro-Al2O3/epoxy resin composites were prepared, respectively. The effects of different micro-Al2O3 particles on the volume resistivity, electrical strength, dielectric constant, and dielectric loss factor of epoxy resins were studied, and the trap properties of the materials were analyzed by thermal stimulated current experi- ment. The results show that short-chain silane coupling agents without polar group have best modification effect on micro-Al2O3 particles. The insulating properties of the composites increase with the decrease of particle polarities, and the increase of the trap depth in composites may be the reason for the improvement of its insulating properties.

关 键 词：微米氧化铝 表面修饰 环氧树脂 电绝缘性能 

分 类 号：TM215.1[一般工业技术—材料科学与工程]