文献类型：期刊文献

英文题名：Non-covalently modified graphene@poly(ionic liquid) nanocomposite with high-temperature resistance and enhanced dielectric properties

作者：Yuan, You[1];Wang, Xinhua[1];Liu, Xiaoyun[1];Qian, Jun[1];Zuo, Peiyuan[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：154

外文期刊名：COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

收录：;EI(收录号：20220211443701);WOS:【SCI-EXPANDED(收录号:WOS:000742144000002)】；

基金：This work was supported by the National Natural Science Foundation of China (52073091, 51773060, 22171086) ; the Natural Science Foundation of Shanghai (20ZR1414600) .

语种：英文

外文关键词：A; Hybrid; A; Polymer-matrix composites (PMCs); B; Electrical properties; B; High-temperature properties

摘要：Dielectric polymer composites as energy storage components greatly promote the development of highperformance power electronic devices. However, the failure under high voltage and high temperature is still the main problem to be solved. In this work, a non-covalently modified graphene@poly(ionic liquid) (RGO@PIL) nanohybrid has been elaborately designed. The It-It conjugated structure of the nanohybrid prevents the filler from overlapping and improves its dispersion, thus improving the breakdown strength by effectively extending the breakdown path. The double polymer shell structure formed after the introduction of poly(ionic liquid) not only enhances the interfacial polarization effect but also significantly transfers heat evenly within the nanocomposites avoiding failure at high temperatures. At the frequency of 1 kHz and at 200 degrees C, the permittivity of the nanocomposite film reaches 35.51, with a high breakdown strength of 122.96 kV/mm. This work demonstrates a promising strategy to manufacture the electronic circuit equipment materials for applications under extreme environments.