玻璃纤维增强环氧树脂表面电痕化显微特征影响分析  

Influence analysis on microscopic characteristics of tracing on surface of glass fiber reinforced epoxy resins

作　　者：蒋文辉 李远 张凤啸 王永强[2] JIANG Wenhui;LI Yuan;ZHANG Fengxiao;WANG Yongqiang(China Southern Power Grid Digital Grid Research Institute,Guangzhou 510555,China;Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071028,China)

机构地区：[1]南方电网数字电网研究院有限公司,广东广州510555 [2]华北电力大学输变电设备安全防御重点实验室,河北保定071028

出　　处：《绝缘材料》2024年第8期73-81,共9页Insulating Materials

基　　金：南方电网重点科技项目(GZHKJXM20200003)。

摘　　要：为探究玻璃纤维增强环氧树脂复合绝缘材料的表面放电过程及其显微特征,本文通过搭建斜板电极实验平台,采用恒定电痕化电压法对试样进行表面电痕化和蚀损试验,并结合理想液体的伯努利方程分析了电痕的形成机理。还测试了不同电痕蚀损阶段下环氧树脂材料的官能团变化情况、表面粗糙度以及三维形貌。结果表明:绝缘复合材料的潮湿污秽区域极易产生泄漏电流并发生放电,且电痕放电和最严重的损蚀情况总是首先出现在下电极处;随着试样表面电痕腐蚀程度增加,环氧树脂分子链中环氧基、羟基、氨基、醛基逐渐分解,羰基产生后又不完全分解;材料的表面形貌逐渐变得粗糙和不规则,表面粗糙度呈上升趋势,其中爆发期的粗糙度约为起始期的2.8倍。In order to investigate the surface discharge process and its microscopic characteristics of glass fiber reinforced epoxy resin composite insulating material,an experimental platform of slant plate electrode was constructed in this paper.Surface tracing and corrosion tests were conducted on samples by a constant tracing voltage method,and the formation mechanism of electric trace was analyzed by combining the Bernoulli equation of ideal liquid.The change of functional groups,surface roughness,and three-dimensional morphology of epoxy resin materials under different stages of tracing corrosion were tested.The results show that the damp and polluted area of insulation composite material is very easy to generate leakage current and discharge,and the most serious corrosion situation always occurs at the bottom electrode firstly.With the increase of tracing corrosion degree on the surface of sample,the epoxy group,hydroxyl group,amino group,aldehyde group in epoxy resin molecular chain gradually decompose,and the carbonyl group decompose not completely after its generation.The surface morphology of the material gradually becomes rough and irregular,the surface roughness shows an upward trend,and the roughness during the explosive period is about 2.8 times bigger than that during the starting period.

关 键 词：环氧树脂 玻璃纤维 复合材料 耐电痕化 表面形貌 

分 类 号：TM215[一般工业技术—材料科学与工程]