氟化剥离填料对氮化硼/环氧复合材料沿面闪络电压的影响  

Effect of Fluorination and Exfoliation Filler on the Surface Flashover Voltage of Boron Nitride/Epoxy Resin Composites

作　　者：律方成[1,2] 阴凯[1] 付可欣 林浩凡 谢庆[2] 侯志灵[3] 张翀 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]华北电力大学河北省输变电设备安全防御重点实验室,保定071003 [3]北京化工大学理学院,北京100029 [4]全球能源互联网研究院先进输电技术国家重点实验室,北京102211

出　　处：《高电压技术》2017年第9期2800-2807,共8页High Voltage Engineering

基　　金：国家重点研发计划项目(2017YFB0903804)~~

摘　　要：氮化硼/环氧树脂复合材料因其优异的导热、机械、电学性能成为高压电气设备中重要的功能材料。为此提出对填料进行氟化剥离处理以提升复合材料的绝缘性能。通过制备含改性氮化硼质量分数分别为1%、2%、4%、8%的环氧树脂复合材料,与未处理填料的氮化硼/环氧树脂复合材料进行对比,研究其在直流电场下表面电荷消散与闪络电压的特性。采用SEM、FTIR、AFM、EDS等手段研究填料改性前后的性质和材料表面闪络处的形貌和元素成分。结果显示:材料表面电荷的消散速度及闪络电压随填料质量分数的增加而提升;对氮化硼填料氟化剥离处理有助于促进复合材料的电荷消散,提高闪络电压。从电荷消散途径、氮化硼禁带宽度、材料表面陷阱效应方面对实验现象进行了解释,为复合材料的无机填料处理提供了一种新的改性方法。Boron nitride filled epoxy resin composite is a kind of important functional material with thermal conductivity, mechanical and electrical properties in high voltage field. We investigated the properties of the boron nitride/epoxy resin composites by means of fluorination and exfoliation boron nitride. Epoxy resin composite materials were filled with the modified boron nitride mass fraction was 1%, 2%, 4%, and 8%, respectively, and were compared with the untreated boron nitride/epoxy to study the characteristics of surface charge dissipation and flashover voltage level in DC electric field. The properties of the filler before and after modification,morphology, and element of composition surface flashover area were characterized by SEM, FTIR, AFM, and EDS. The results show that the dissipation rate of surface charge and flashover voltage of material will increase with increasing filler content; The surface charge dissipation rate and flashover voltage of composite has been promoted by modified fillers. The experimental phenomena were explained from boron nitride band width, the combination of filler and matrix, and the trap effect. It provides a new modification method for inorganic filler treatment of composite insulating materials.

关 键 词：氟化 氮化硼纳米片 环氧树脂 表面电荷 直流闪络电压 

分 类 号：TM21[一般工业技术—材料科学与工程]