摘要
为了研究氟化温度对表面特性和耐放电性能的影响,在实验室反应釜中、使用氟气体积分数为12.5%的F2/N2混合气,对环氧树脂(DGEBA和聚醚胺体系)/玻璃纤维复合试片分别在25、55和85℃下进行了60min的氟化处理。衰减全反射红外分析表明氟化导致了试样表面化学组成和结构的本质变化及这些变化与氟化温度的关联。表面电导率和表面电位衰减测量一致地显示了这些表面氟化的试样比未氟化的试样(原试样)有较高的表面传导,且表面传导随氟化温度的升高而增加。接触角测量揭示了氟化使该复合绝缘的表面润湿性增加,但随着氟化温度的升高表面湿润性呈现降低的趋势。实验室环境中的交流闪络实验进一步表明了,这些表面氟化的试样比原试样有高得多的耐放电降解或起痕能力,但氟化未引起交流闪络电压明显的提高。另外,闪络实验结果同时显示这一耐放电性能与氟化温度的关联。
Epoxy resin (DGEBA and Polyetheramines system)/fiberglass composite sheets were surface fluorinated in a laboratory vessel using a F2/N2 mixture with 12.5% F2 at the different temperatures of 25, 55, and 85 ℃ for the same time of 60 min, to investigate the effects of fluorination temperature on surface properties and discharge resistance. ATR-IR analyses indicate that fluorination leads to substantial changes in surface chemical composition and structure, depending on fluorination temperature. Measurements of surface conductivity and surface potential decay consistently show that the surface fluorinated samples have higher surface conduction than the unfluorinated (original) sample, and surface conduction increases with the fluorination temperature. Contact angle measurements reveal that fluorination will increase the surface wettability of the composite insulator, while the surface wettability tends to decrease with the increase of fluorination temperature. AC flashover tests in the laboratory environment further indicate that the surface fluorinated samples have a much higher degradation or tracking resistance in comparison with the virgin sample, but the fluorination only leads to a marginal increase in AC flashover voltage. In addition, the flashover test results also showed an association of the tracking resistance with fluorination temperature.
作者
杜勇
姚京松
吴向东
阙龙凯
沈小军
安振连
DU Yong;YAO Jingsong;WU Xiangdong;QUE Longkai;SHEN Xiaojun;AN Zhenlian(State Grid Hubei Electric Power Company Maintenance Company,Wuhan 430050,China;State Grid Hubei Electric Power Company,Wuhan 430077,China;Department of Electrical Engineering,Tongji University,Shanghai 201804,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第12期3791-3797,共7页
High Voltage Engineering
关键词
环氧树脂/玻璃纤维复合
表面氟化
氟化温度
表面特性
耐降解或起痕性能
交流闪络性能
epoxy resin/fiberglass composite
surface fluorination
fluorination temperature
surface properties
degradation or tracking resistance
AC flashover performance
