耐电晕聚酰亚胺薄膜研究进展  

Research Progress of Corona Resistant Polyimide Films

作　　者：张镱议[1] 赵梓炜 刘捷丰[1] 查俊伟[2,3] Zhang Yiyi;Zhao Ziwei;Liu Jiefeng;Zha Junwei(Guangxi Power Transmission and Distribution Network Lightning Protection Engineering Technology Research Center Guangxi University,Nanning 530004,China;School of Chemistry and Biological Engineering University of Science and Technology Beijing,Beijing 100083,China;Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]广西大学广西电力输配网防雷工程技术研究中心,南宁530004 [2]北京科技大学化学与生物工程学院,北京100083 [3]北京科技大学北京材料基因工程高精尖创新中心,北京100083

出　　处：《电工技术学报》2023年第5期1190-1205,共16页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51977114,52277138);八桂青年学者专项资助。

摘　　要：聚酰亚胺因其耐电晕性能不足严重缩短了复杂工况下的使用寿命,纳米改性技术的应用为耐电晕聚酰亚胺薄膜的研发提供了新的发展方向。该文首先从耐电晕机理出发,综述了电晕下聚酰亚胺的老化进程;然后从材料的介电特性、电导特性、陷阱特性、界面效应及热导率等性能参数分析了提升复合聚酰亚胺耐电晕性能的策略;最后针对当前耐电晕聚酰亚胺薄膜研究存在的问题进行了总结,并对未来发展方向做出了展望,以期实现具有优异耐电晕性能聚酰亚胺薄膜的研发。With the development of power equipment in the direction of miniaturization and high frequency,the insulating medium in the power equipment needs to withstand higher frequency voltage levels.Polyimide is widely used as inter-turn insulating material in variable frequency motors,high-frequency transformers and wind power generation due to its excellent insulating properties,thermal stability and chemical resistance.However,due to its lack of corona resistance,the service life in high frequency environment is greatly shortened.Therefore,studying the corona aging mechanism of polyimide and the effect mechanism of material parameters on corona resistance is beneficial to the development of polyimide with higher corona resistance.First,in this paper,starting from the corona aging mechanism,the polyimide corona aging model is illustrated graphically,and the aging process is summarized into three aspects:particle impact,high temperature ablation and corrosion of active products.The energy characteristics of charged particles and the microstructure changes of polyimide are reviewed,and two corona aging models are introduced from the perspective of charge transport and energy conversion.The results show that:(1)The particles generated by corona discharge have great energy and can quickly destroy the molecular structure of polyimide,and the imide ring,ether bond and benzene ring change most obviously after corona aging.(2)The nanoparticles in the matrix can effectively weaken the energy of charged particles,reduce the damage of corona discharge to the polymer,and improve the corona resistance of the material.Secondly,the research progress of corona-resistant polyimide in recent years is analyzed from five aspects:dielectric properties,electrical conductivity properties,trap properties,interface properties and thermal conductivity.The following conclusions can be drawn:(1)The increase of the dielectric constant can improve the charge injection barrier,reduce the risk of charge injection and charge accumulation,and effective

关 键 词：聚酰亚胺 纳米改性 电晕老化 耐电晕性 

分 类 号：TB34[一般工业技术—材料科学与工程] TM21[电气工程—电工理论与新技术]