聚合物/氮化硅复合材料导热性能研究进展

Study on thermal conductivity of polymer/Si_3N_4 composites

综述了聚合物/氮化硅(Si_3N_4)复合材料性能最新研究进展,重点讨论了Si_3N_4用量、粒径、表面改性、混杂填充等对聚合物/Si_3N_4复合材料导热性能及其他性能的影响,以期为制备高导热聚合物/Si_3N_4复合材料提供参考。聚合物/Si_3N_4复合材料的热导率随Si_3N_4用量增加而增加;Si_3N_4在聚合物基体中均匀分布时,大粒径Si_3N_4更有利于提高热导率,若Si_3N_4在聚合物基体粒子周围包覆,形成"核壳"结构时,则小粒子更有利于提高复合材料热导率;与单一粒径Si_3N_4填充相比,混杂填充更有利于提高复合材料热导率。

This paper provides an overview of the latest research progress of thermal conductive Si_3N_4/polymer composites and focuses on the dependence of thermal conductivity and other physical properties of Si_3N_4/polymer on content, size, and surface modification Si_3N_4 and hybrid filling to provide useful reference for the preparation of high thermal conductive Si_3N_4/polymer composites. The results show that the thermal conductivity of Si_3N_4/polymer composite rises with increasing of Si_3N_4 content. Large-size Si_3N_4 helps to improve the thermal conductivity of composites when Si_3N_4 is uniformly distributed in the polymer matrix, while the small-size Si_3N_4 is more effective to improve the thermal conductivity of composites when polymer particles are coated with Si_3N_4 to form a ＂core-shell＂structure. Compared to Si_3N_4 with single size, hybrid filler is more helpful to improve the thermal conductivity of the composites.