碳纳米管/天然橡胶热界面材料制备及热管理性能研究  

Preparation of carbon nanotube/natural rubber thermal interface materialsand study of the thermal management performance

作　　者：安东[1] 陈嘉祺 贺日臻 AN Dong;CHEN Jiaqi;HE Rizheng(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学材料科学与工程学院,太原030051

出　　处：《功能材料》2024年第4期4185-4190,共6页Journal of Functional Materials

基　　金：山西省回国留学人员科研资助项目(2023-121);山西省留学人员科技活动择优资助项目(20230016)。

摘　　要：热界面材料是解决现代高功率和高集成化电子器件热量聚集和耗散的有效手段。基于三维网络结构调控导热性能的策略,以三聚氰胺泡沫(MF)为骨架,采用化学表面改性制备碳纳米管三维网络结构(CNT),并采用真空浸润法制备碳纳米管/天然橡胶热界面复合材料(CNT/NR),研究CNT含量对材料微观结构、导热性能和热管理性能的影响。结果表明,当CNT的含量为2.2%(质量分数)时,CNT可附着于MF骨架并呈现完整连续的三维网络结构,其热界面复合材料垂直面外的导热率为1.58 W m^(-1) K^(-1),拉伸强度为12.9 MPa,断裂伸长率为489%,并具有显著的热管理性能,这表明CNT/NR热界面复合材料有望成为一种机具应用价值的热管理材料。Thermal interface materials offer an effective means to address the thermal accumulation and dissipation challenges in modern high-power and highly integrated electronic devices.Employing a strategy based on the regulation of thermal conductivity through a three-dimensional network structure,we used melamine foam(MF)as the framework.We prepared a three-dimensional network structure of carbon nanotubes(CNT)by employing chemical surface modification and high-temperature carbonization.Subsequently,we created a thermal interface composite material of carbon nanotubes/natural rubber(CNT/NR)using a vacuum infiltration method,and investigated the influence of CNT content on the material's microstructure,thermal conductivity,and thermal management performance.The results indicate that when the CNT content is 2 wt%,CNT can adhere to the MF framework,forming a complete and continuous three-dimensional network structure.This CNT/NR thermal interface composite material exhibits a thermal conductivity of 1.68 W/(m·K),a tensile strength of 12.9 MPa,and a elongation at break of 489%in the vertical direction and demonstrates significant thermal management capabilities,showing significant thermal management performance.These findings suggest that CNT/NR thermal interface composite materials have the potential to become valuable thermal management materials suitable for applications.

关 键 词：热管理 热界面材料 导热性能 机械性能 CNT 

分 类 号：TQ332[化学工程—橡胶工业]