摘要
提升环氧树脂的电、热性能对固封极柱、干式变压器等中低压电气设备的长期安全稳定运行意义重大。文中采用偶联剂KH550对纳米Al_(2)O_(3)以及经羟基化处理的纳米h-BN粒子进行表面接枝后填充入环氧树脂基体,研究了填料纳米Al_(2)O_(3)、纳米h-BN对环氧树电热性能的影响。结果表明,纳米Al_(2)O_(3)/h-BN混合填充能够形成良好的协同效应,复合材料在电绝缘参数大幅提升的同时,热性能也得到明显改善。Al_(2)O_(3)填充质量分数为2%、h-BN填充质量分数为1%时,复合材料的介电性能最优,同时,击穿电压相较未改性提升了27.1%;Al_(2)O_(3)和h-BN填充质量分数均为1.5%时,复合材料的热导率最高,绝缘失效温度至351.5℃。这一结果可为高温强电场下环氧树脂固封设备高可靠性运行提供参考。
Enhancing the electrical and thermal properties of epoxy resin is of great significance for the long-term safe and stable operation of medium and low voltage electrical equipment such as sealed poles and dry-type transformers.In this paper,coupling agent KH550 was used to surface graft nano Al_(2)O_(3) and hydroxyl-functionalized nano h-BN particles,which were then filled into the epoxy resin matrix.The effects of nano Al_(2)O_(3) and nano h-BN fillers on the electrical and thermal properties of epoxy resin were investigated.The results show that the nano Al_(2)O_(3)/h-BN hybrid filling could form a good synergistic effect,and the composite material could significantly improve its electrical insulation parameters while also improving its thermal properties.The composite material has the optimal dielectric properties when the Al_(2)O_(3) filling mass fraction is 2%and the h-BN filling mass fraction is 1%,with a breakdown voltage increase of 27.1%compared to the unmodified sample.The composite material has the highest thermal conductivity when the Al_(2)O_(3) and h-BN filling mass fractions are both 1.5%,and the insulation failure temperature is up to 351.5℃.These results can provide a reference for the high reliability operation of epoxy resin sealing equipment under high temperature and strong electric fields.
作者
程显
安永科
贺永明
张鹤
陈硕
Xian Cheng;Yongke An;Yongming He;He Zhang;Shuo Chen(School of Electrical and Information Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan Engineering Research Center of Power Transmission&Distribution Equipment and Electrical Insulation,Zhengzhou 450001,China;Pinggao Group Co.,Ltd.,Pingdingshan 467001,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2023年第7期131-138,共8页
Polymer Materials Science & Engineering
基金
2022年度河南省重大科技专项(221100240500)。
关键词
环氧树脂
复配改性
介质损耗
击穿电压
热稳定性
epoxy resin
compound modification
dielectric loss
breakdown voltage
thermal stability
