基于四氰基苯醌二甲烷掺杂的聚乙烯电气强度提升方法  

A method for improving electric strength of polyethylene by doping tetracyano-benzoquinone dimethane

作　　者：陈纯松 王家璇 李逸飞 朱明晓[1] 钟振芳[1] CHEN Chunsong;WANG Jiaxuan;LI Yifei;ZHU Mingxiao;ZHONG Zhenfang(China University of Petroleum(East China),Qingdao 266000,China)

机构地区：[1]中国石油大学(华东),山东青岛266000

出　　处：《绝缘材料》2024年第7期36-42,共7页Insulating Materials

基　　金：国家自然基金资助项目(52007198);山东省自然科学基金资助项目(ZR2021ME027)。

摘　　要：本文引入具备窄带隙的四氰基苯醌二甲烷有机小分子,通过溶液共混制备了聚乙烯/四氰基苯醌二甲烷复合材料,并考察四氰基苯醌二甲烷掺杂含量对复合材料直流击穿特性、高场电导及陷阱分布特性的影响。结果表明:复合材料的电气强度随着四氰基苯醌二甲烷掺杂含量的增加先升高后降低,四氰基苯醌二甲烷的掺入使聚乙烯的电气强度最大提高了约54%,且有效降低了电导率。陷阱分布测量与量子化学仿真证实四氰基苯醌二甲烷引入了电荷深陷阱,增强了对载流子的捕获作用,使聚乙烯的直流电气强度获得提升。In this paper,tetracyano-benzoquinone dimethane organic small molecules with narrow band gap were introduced,and polyethylene/tetracyano-benzoquinone dimethane composites were prepared by solution blending.The effects of doping content of tetracyano-benzoquinone dimethane on DC breakdown properties,high field conductance and trap distribution properties of the composite were investigated.The results show that the electric strength of the composite increases first and then decreases with the increase of the doping content of tetracyano-benzoquinone dimethane,the addition of tetracyano-benzoquinone dimethane increases the electric strength of polyethylene by a maximum of about 54%,and effectively decreases its conductivity.Trap distribution measurement and quantum chemical simulation confirm that tetracyano-benzoquinone dimethane introduces charge deep traps,enhances the trapping effect of charge carriers,and improves the DC electric strength of polyethylene.

关 键 词：聚乙烯 窄带小分子掺杂 介电性能 深陷阱 仿真建模 

分 类 号：TM215[一般工业技术—材料科学与工程]