碳纤维/六方氮化硼/三元乙丙橡胶复合材料导热性能及其数值模拟  

Thermal Conductivity of CF/h-BN/EPDM Composites and Numerical Simulation of Their Thermal Conductivity

作　　者：刘泽宏 蒋兴华[1,2] 郭建华 Zehong Liu;Xinghua Jiang;Jianhua Guo(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China;Zhongshan South China University of Technology Modern Industrial Technology Research Institute,South China University of Technology,Zhongshan 528400,China;School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]中山市华南理工大学现代产业技术研究院,广东中山528400 [3]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《高分子材料科学与工程》2024年第7期85-93,共9页Polymer Materials Science & Engineering

基　　金：广东省重点研发计划项目(2024B0101040003);技术领域基金项目(2023-JCJQ-JJ-0080);中山市科技计划(2020AG022)。

摘　　要：5G通讯、消费电子和新能源汽车领域的快速发展对导热材料的需求日益增长,高性能导热复合材料逐渐成为研究热点。由于导热硅胶垫片存在小分子硅油渗出和高温挥发的缺点,不适合用于高洁净度要求的应用场景。文中采用液体三元乙丙橡胶(EPDM)为基体,以碳纤维(CF)和六方氮化硼(h-BN)为导热填料,制备了不渗油且无VOC排放的柔性导热复合材料,并采用有限元仿真模拟了不同体积比和体积分数的混合填料填充复合材料的导热行为,预测了复合材料的导热系数,并将导热系数的模拟值与实测值进行对比,二者误差在10%以内,吻合度较高。该研究为混合填料填充柔性导热复合材料的导热性能模拟和预测提供了新途径。With the rapid development of 5G communication,electronics and new energy vehicles,there is an increasing demand for thermal conductivity materials.Consequently,high-performance thermal conductivity composites have emerged as a prominent area of research.Considering the limitations associated with seepage and high-temperature volatilization of small molecule silicone oil in thermal conductive silicone rubber gaskets,they are not suitable for some applications requiring high cleanliness.Therefore,this study employed liquid ethylenepropylene-diene monomer rubber(EPDM)as matrix,and incorporated carbon fiber(CF)and hexagonal boron nitride(h-BN)as thermal conductive fillers to fabricate flexible thermal conductive composites without silicone oil leaking and VOC emission.Finite element simulation was utilized to simulate the thermal conductive behavior of the composites and predict the thermal conductivity of the composites filled with hybrid fillers at different volume ratios and fractions.The results demonstrate that the discrepancy between simulated and measured thermal conductivities is less than 10%,indicating good agreement between them.This study presented a novel approach for simulating and predicting the thermal conductivity of flexible thermal conductive composites filled with hybrid fillers.

关 键 词：碳纤维 六方氮化硼 液体三元乙丙橡胶 导热系数 数值模拟 

分 类 号：TB332[一般工业技术—材料科学与工程]