高密度聚乙烯/石墨/碳纤维导热复合材料性能的研究

Study on the Properties of HDPE/Graphite/Carbon Fiber Thermal Conductivity Composite

采用高密度聚乙烯(HDPE)、石墨、碳纤维制备高导热、高强度的复合材料。通过SEM照片考察高密度聚乙烯/石墨/碳纤维复合体系的微观结构;研究石墨及碳纤维的加入是否可以形成导热通道以及随着石墨的添加量的提高,复合材料的导热性能及其力学性能的变化。结果表明:当石墨的质量分数为60%,碳纤维的质量分数为5%时,复合材料的导热系数达到7.938 W/(m.K),是纯HDPE的20倍。

High density polyethylene, graphite and carbon fiber were chosen to prepare a composite material with high thermal conductivity and high strength. Its microstructure was observed by SEM as well as whether it can form a thermal channel by using graphite and carbon fiber. The changes of the material＇s thermal conductivity and mechanical properties with the increasing of the addition of graphite were studied. When using 60w% graphite and 5 w% carbon fiber, the coefficient index of thermal conductivity reached at 7.938 W/（m · K） which was 20 times of the pure HDPE.