氮化硼纳米管与芳纶纳米纤维复合制备高导热复合绝缘纸  

High thermal conductive composite insulating paper prepared by boron nitride nanotubes and aramid nanofibers

作　　者：任俊文 卿湫惋喻 魏佳 卓然 滕富莉 高萌 卞超 贾申利 REN Junwen;QING Qiuwanyu;WEI Jia;ZHUO Ran;TENG Fuli;GAO Meng;BIAN Chao;JIA Shenli(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;Electric Power Research Institute of CSG,Guangzhou 510623,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]南方电网科学研究院有限责任公司,广东广州510623

出　　处：《绝缘材料》2024年第11期65-72,共8页Insulating Materials

基　　金：国家自然科学基金资助项目(52107020,52377028);四川省重点研发项目(2023YFG0236);电力设备电气绝缘国家重点实验室开放基金资助项目(EIPE23210)。

摘　　要：随着现代电气设备向小型化、高度集成化和多功能化方向发展,大量的热量积累导致电气设备的绝缘失效。为了开发一种在低含量填料下(质量分数<50%)仍能实现高导热性能的复合材料,满足当前电气设备对散热的严格要求,本文合成了一种由芳纶纳米纤维和羟基化氮化硼纳米管(BNNT-OH)组成的复合绝缘纸,并研究了BNNT-OH含量对复合绝缘纸性能的影响。结果表明:当氮化硼纳米管质量分数为20%时,复合绝缘纸的热导率高达15.92 W/(m·K)。优异的导热性能归因于氮化硼纳米管固有的高热导率,以及羟基化氮化硼纳米管与芳纶纳米纤维之间的强相互作用降低了界面热阻。With the development of modern electrical equipment toward miniaturization,high-degree integration,and multifunctionalization,a large amount of heat accumulation will lead to insulation failure of electrical equipment.In order to develop a composite that can achieve high thermal conductivity even with low filler content(mass fraction<50%)and meet the strict requirement of current electrical equipment for heat dissipation,a composite insulating paper composed of aramid nanofibers and hydroxylated boron nitride nanotubes(BNNT-OH)was synthesized in this paper,and the effects of BNNTOH content on the properties of composite insulating paper were studied.The results show that when the mass fraction of boron nitride nanotubes is 20%,the thermal conductivity of composite insulating paper is as high as 15.92 W/(m·K).The excellent thermal conductivity is due to the high intrinsic thermal conductivity of boron nitride nanotubes,and that the strong interaction between hydroxylated boron nitride nanotubes and aramid nanofibers reduces the interfacial thermal resistance.

关 键 词：氮化硼纳米管 芳纶纳米纤维 绝缘纸 热导率 界面热阻 

分 类 号：TM215[一般工业技术—材料科学与工程]