Carbon nanotubes and hexagonal boron nitride nanosheets co-filled ethylene propylene diene monomer composites:Improved electrical property for cable accessory applications  

作　　者：Tiandong Zhang Huiduo Xu Chuanxian Dai Changhai Zhang Yongquan Zhang Qingguo Chi 

机构地区：[1]School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin,China

出　　处：《High Voltage》2024年第3期546-555,共10页高电压（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:U20A20308,52277024;Heilongjiang Provincial Natural Science Foundation of China,Grant/Award Number:LH2020E093。

摘　　要：Rubber-based composites based on ethylene propylene diene monomer(EPDM)with excellent non-linear electrical conductivity are preferred to serve as reinforced insu-lation in cable accessories,which can self-adaptively regulate electric field distribution and avoid electric field concentration due to the non-linear conductivity.The conductive carbon nanotubes(CNT)are filled into EPDM to improve the non-linear conductivity,while the insulating hexagonal boron nitride nanosheets(h-BN)are used to reconcile the electric breakdown strength.The results show that with the increase of CNT loading content,the non-linear conductivity of CNT/h-BN/EPDM com-posites becomes more prominent,accompanying the decrease of threshold field strength and increase of non-linear coefficient.However,the electric breakdown strength of CNT/h-BN/EPDM composites seriously deteriorates due to the increase of CNT content and temperature.By incorporating 10 wt.%h-BN into the com-posites,the reduction percentage of breakdown strength can be significantly lowered,which is 19.95%of neat EPDM and 13.74%of CNT/h-BN/EPDM composites at 70℃,respectively.The COMSOL Multiphysics simulation results demonstrate that using the CNT/h-BN/EPDM composite as the reinforced insulation can eliminate the electric field concentration of the cable accessory as well as enable the cable accessory with good lightning shock resistance.

关 键 词：COMPOSITES hexagonal boron 

分 类 号：TM24[一般工业技术—材料科学与工程]