通过加入氧化锌填料和接枝小极性分子改善硅橡胶的非线性导电性能

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Qingguo Chi, Huiyang Zhang, Zhaotong Meng, Changhai Zhang, Yongquan Zhang, Yue Zhang, Chao Yin, Tiandong Zhang
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引用次数: 0

摘要

硅橡胶(SiR)具有优异的绝缘性、弹性和耐高温性,因此常用于高压直流(HVDC)电缆附件的增强绝缘部件。由于增强绝缘和主绝缘之间的导电性能不匹配,高压直流电缆附件总是存在局部电场集中的问题,最终可能导致电气击穿。基于 SiR 的非线性导电复合材料能够自适应地调整电缆附件中的电场分布。这有望解决局部电场集中的问题。氧化锌(ZnO)和甲基丙烯酸缩水甘油酯(GMA)分别用作填料和接枝改性剂,以提高 ZnO/SiR-GMA 复合材料的非线性导电性。结果表明,接枝 GMA 可提高 SiR 的导电性,而掺杂 ZnO 填料可使 SiR 具有非线性导电特性。复合材料的掺杂和接枝改性相结合,可在较低的氧化锌填料含量下实现优异的非线性导电特性。此外,改性复合材料的机械性能也得到了提高。模拟结果表明,在用作电缆中间接头的增强绝缘材料时,ZnO/SiR-GMA 是均匀电场的最有效材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Improvement in non-linear electrical conductivity of silicone rubber by incorporating zinc oxide fillers and grafting small polar molecules

Improvement in non-linear electrical conductivity of silicone rubber by incorporating zinc oxide fillers and grafting small polar molecules

Silicone rubber (SiR) is commonly used in reinforced insulation parts for high-voltage direct current (HVDC) cable accessories due to its excellent insulation, elasticity, and high-temperature resistance. HVDC cable accessories always suffer from the local electric field concentration due to the electrical conductivity mismatch between reinforced insulation and main insulation, which can ultimately lead to electric breakdown. The non-linear conductive composites based on SiR have the ability to adaptively adjust the distribution of the electric field in cable accessories. This is expected to solve the problem of localised electric field concentration. The zinc oxide (ZnO) and glycidyl methacrylate (GMA) are used as fillers and grafted modifier respectively to improve the non-linear electrical conductivity of ZnO/SiR-GMA composites. The results indicate that grafting GMA can increase electrical conductivity of SiR, while doping ZnO filler enables SiR to have non-linear conductivity characteristics. The combination of doping and grafting modification of the composites achieves excellent non-linear conductive properties at lower ZnO filler content. Additionally, the mechanical properties of the modified composites are enhanced. The simulation results indicate that ZnO/SiR-GMA is the most effective material for homogenising the electric field when used as reinforced insulation for cable intermediate joints.

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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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