摘要
玄武岩纤维具有良好的绝缘性能、力学性能以及高温、化学环境下的性能稳定性,由其制成的玄武岩纤维复合材料芯棒(BFRP)在电工绝缘装备领域逐步得到了推广和应用。然而,湿热环境仍是威胁BFRP芯棒使用可靠性的关键因素。本文分别以有机硅改性环氧树脂乳液(SER)和氢化双酚A环氧树脂乳液(HBPA)为主要原料制备两种浸润剂,利用浸润剂改性玄武岩纤维并制备两种复合材料,最后通过湿热老化试验和分子动力学模拟分析两种玄武岩纤维复合材料的耐湿热老化机理。结果表明:BFRP-SER拥有良好的耐湿热老化性能,其弯曲强度和电气强度较老化前下降幅度最小,分别下降30.1%和35.2%;泄漏电流和介质损耗因数较老化前上升幅度最小,分别提升了31.3%和141.0%。SER浸润剂涂层与纤维层和树脂层有较好的结合效果,且具有较高的耐水解性,这使BFRP-SER能够在湿热环境下较长时间内保持各项性能稳定。
Basalt fiber exhibits excellent insulating properties,mechanical properties,and stability under high temperatures and in chemical environments,and basalt fiber composite core rods(BFRP)made from it have gradually been promoted and applied in the field of electrical insulation equipment.However,hygrothermal environments remain a critical factor threatening the service reliability of BFRP core rods.In this paper,two types of sizing agents were prepared using silicone-modified epoxy resin emulsion(SER)and hydrogenated bisphenol A epoxy resin emulsion(HBPA)as the primary raw materials.Basalt fibers was modified by sizing agents and two types of composites were prepared.Finally,the hygrothermal ageing mechanisms of these two basalt fiber composites were analyzed through hygrothermal ageing tests and molecular dynamics simulations.The results show that BFRP-SER has excellent hygrothermal ageing resistance.Its bending strength and electric strength decrease the least compared with those of the sample before ageing,decrease by 30.1%and 35.2%,respectively.The leakage current and dielectric loss factor increase the least compared with those of the sample before ageing,increase by 31.3%and 141.0%,respectively.The SER sizing coating demonstrates good bonding effectiveness with the fiber layer and resin layer,and has high hydrolysis resistance,which enables BFRP-SER to maintain stable performance for a long time in hygrothermal environments.
作者
刘贺晨
吴鹏
刘云鹏
薛伟
龚运
林浩凡
LIU Hechen;WU Peng;LIU Yunpeng;XUE Wei;GONG Yun;LIN Haofan(Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment,North China Electric Power University,Baoding 071003,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;State Grid Zhejiang Electric Power Co.,Ltd.,Comprehensive Service Branch,Hangzhou 310000,China;State Gird Zhejiang Electric Power Research Institute,Hangzhou 310000,China)
出处
《绝缘材料》
北大核心
2025年第8期119-129,共11页
Insulating Materials
基金
河北省自然科学基金资助项目(E2024502039)。
关键词
玄武岩纤维
涂层改性
耐湿热
复合材料
分子动力学
basalt fibers
coating modification
hydrothermal resistance
composites
molecular dynamics
作者简介
刘贺晨(1989-),男(汉族),河北保定人,副教授,博士,主要从事环保型环氧树脂及其复合材料研制、电气设备绝缘状态评估及聚合物电树枝特性研究等工作;通信作者:刘云鹏(1976-),男(汉族),北京人,教授,博士,主要从事特高压输电技术、电气设备在线监测和外绝缘的研究。
