Ice-templated assembly strategy is an effective method to construct filler networks. The filler networks can be used to increase the thermal conductivity of polymer composites. Herein, silicon carbide nanowires, reduced graphene oxide and cellulose nanofiber were used as assembly units to construct vertically aligned filler networks by ice-templated assembly strategy. Polydimethylsiloxane grafted with poly(ethylene glycol) could enhance the interfacial interaction and improve the wettability between silicone rubber and the filler networks. Silicon carbide/reduced graphene oxide/silicone rubber composites were prepared by infiltrating the filler networks with silicone rubber. The thermal conductivity of the composites increased with increasing the contents of silicon carbide and reduced graphene oxide. The thermal conductivity of the composite with 1.84 vol% filler network was as high as 2.74 W/(m·K), exhibiting significant enhancement of thermal conductivity of 16 times compared with silicone rubber. This work provides an insight for preparing highly thermally conductive silicone rubber composites.

冰样组装策略是构建填充网络的有效方法。填料网络可用于增加聚合物复合材料的导热性。在本文中，将碳化硅纳米线，还原的氧化石墨烯和纤维素纳米纤维用作组装单元，以通过冰模板化的组装策略构建垂直排列的填料网络。聚乙二醇接枝的聚二甲基硅氧烷可以增强界面相互作用，改善硅橡胶与填料网络之间的润湿性。碳化硅/还原氧化石墨烯/硅橡胶复合材料是通过用硅橡胶渗透填料网络来制备的。复合材料的热导率随碳化硅含量的增加和氧化石墨烯含量的减少而增加。具有1.84体积％填料网络的复合材料的导热系数高达2.74 W /（m·K），与硅橡胶相比，导热系数显着提高了16倍。这项工作为制备高导热硅橡胶复合材料提供了见识。