摘要
绞合式碳纤维复合芯导线在输电线路增容改造工程中具有良好的应用前景,但由于运行时间较短,复合材料芯的老化性能尚缺乏深入的研究,针对此,对碳纤维复合芯在不同溶液介质和湿热环境中的老化行为开展研究。开展酸浸泡、碱浸泡和盐水煮3种人工加速老化试验,通过三点弯曲试验考察3种老化条件对碳纤维复合芯力学性能的影响规律,并利用红外光谱分析、热失重分析、扫描电镜等材料分析手段探究碳纤维复合芯的成分结构变化。试验研究表明,碳纤维复合芯在酸、碱介质下的耐老化性受树脂基体耐受性的影响,具有耐酸不耐碱的特点;在水煮环境中碳纤维复合芯的劣化主要是物理老化;碳纤维复合芯老化后的性能衰减与基体和界面结构的破坏直接相关。
The carbon fiber composite core conductor has a wide application prospect in the capacity expansion of the power grid.However,due to the short running time and lack of in-depth research on the aging performance of the composite core,this paper studies the aging behavior of the carbon fiber composite core in different solution medias and hydrothermal environment.It carries out the accelerated aging tests in acid immersion,alkaline immersion and salt water boiling conditions respectively,and investigates the effect laws of three aging conditions on the mechanical properties of the carbon fiber composite core by three-point bending test.By means of Fourier transform infrared spectroscopy,thermogravimetric analysis and scanning electron microscopy,it explores the composition and structure changes of the carbon fiber composite core.The results show that the aging resistance of the carbon fiber composite core under acid and alkali solution is affected by the resin matrix,and the core has the characteristics of acid resistance and being intolerant of alkali.Besides,the deterioration of the carbon fiber composite core in boiling water environment is mainly physical aging,and the performance attenuation of the carbon fiber composite core after aging is directly related to the destruction of resin matrix and compound interface structure due to the effect of resin matrix transferring load to carbon fiber.
作者
居一峰
陈蔚卓
高弋淞
廖永力
黄增浩
朱登杰
张志强
JU Yifeng;CHEN Weizhuo;GAO Yisong;LIAO Yongli;HUANG Zenghao;ZHU Dengjie;ZHANG Zhiqiang(Haikou Power Supply Bureau of Hainan Power Grid Co.,Ltd.,Haikou,Hainan 570000,China;CSG Electric Power Research Institute Co.,Ltd.,Guangzhou,Guangdong 510663,China)
出处
《广东电力》
2021年第3期114-121,共8页
Guangdong Electric Power
基金
中国南方电网有限责任公司科技项目(070100KK52190002)。
关键词
碳纤维复合芯
老化
力学性能
复合材料
carbon fiber composite core
aging
mechanical properties
composite material
