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
杨超 1姚青云 2唐双美 2陈其龙 3覃峰3
作者信息
- 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
- 折叠
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.
Abstract
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Key words
composite material/fluorinated graphene/polyimide/thermal conductivity characteristics/electrical insulation performance引用本文复制引用
基金项目
广西省科技计划项目(2022GXNSFAA035597)
出版年
2024
NETL
NSTL
万方数据