氟化石墨烯/聚酰亚胺复合膜的导热和电绝缘性能  

Thermal conductivity and electrical insulation properties of fluorographene/polyimide composite films

作　　者：杨超[1] 姚青云 唐双美 陈其龙[3] 覃峰[3] YANG Chao;YAO Qing-yun;TANG Shuang-mei;CHEN Qi-long;QIN Feng(Research Center for Inorganic Nanopowder and Application Engineering,Guilin University of Technology,Guilin 541004,China;Chief Engineer's Office,Guangxi Road Construction Engineering Group Co.,Ltd.,Nanning 530001,China;College of Road and Bridge Engineering,Guangxi Institute of Communications Technology,Nanning 530023,China)

机构地区：[1]桂林理工大学无机纳米粉体及应用工程研究中心,广西桂林541004 [2]广西路建工程集团有限公司总工程师办公室,南宁530001 [3]广西交通职业技术学院路桥工程学院,南宁530023

出　　处：《吉林大学学报（工学版）》2024年第3期663-673,共11页Journal of Jilin University:Engineering and Technology Edition

基　　金：广西省科技计划项目(2022GXNSFAA035597).

摘　　要：为提高聚酰亚胺基复合材料的导热和电绝缘性能,通过超声剥离制备了氟化石墨烯纳米片,采用热压取向制备了具有水平定向导热特性的氟化石墨烯/聚酰亚胺复合膜,研究了氟化石墨烯添加量对复合膜导热和电绝缘性能的影响规律。结果表明:增加氟化石墨烯添加量能提高复合膜的面内导热系数,氟化石墨烯质量分数为30%时,复合膜的面内导热系数为2.4 W/(m·K);氟化石墨烯添加量增加时,复合膜的直流耐压性能略有降低,但复合膜表面耐电痕性能增加,原因在于声子在复合膜中传递效率提升。上述研究结果可为制备高导热系数、高电绝缘性能的复合膜提供参考。In order to improve the thermal conductivity and electrical insulation properties of polyimide matrix composites,fluorographene nanosheets were prepared by ultrasonic exfoliation process,and fluorographene/polyimide composite films with horizontal directional thermal conductivity characteristics were prepared by hot-pressing induced orientation process.The results show that increasing the amount of fluorinated graphene can improve the in-plane thermal conductivity of the composite film.When the mass fraction of fluorinated graphene is 30%,the in-plane thermal conductivity of the composite film is 2.4 W/(m·K).When the amount of fluorinated graphene increases,the DC withstand voltage performance of the composite film slightly decreases,but the electrical tracking resistance of the composite film increases due to the improved phonon transfer efficiency in the composite film.The above research results can provide reference for the preparation of composite films with high thermal conductivity and high electrical insulation performance.

关 键 词：复合材料 氟化石墨烯 聚酰亚胺 导热特性 电绝缘性能 

分 类 号：TB383[一般工业技术—材料科学与工程]