针对传统导热材料基体难以自然降解的问题，选择更加环保的蚕丝蛋白为基体材料，采用球磨共混-热压成型制备了氮化硼/蚕丝蛋白导热复合材料，考察了复合材料的形貌结构和导热性能。结果表明，氮化硼在复合材料中沿水平方向分布，导致复合材料表现出明显的导热各向异性。复合材料的导热系数随着氮化硼质量分数的增加而提高。当氮化硼质量分数为50%时，复合材料的水平方向导热系数为12.42 W/（m·K），垂直方向导热系数为0.41 W/（m·K）。红外热成像结果表明，氮化硼/蚕丝蛋白复合材料具有优异的传热性能。

Aiming at the problem that the matrixes of traditional thermal conductive materials are difficult to degrade naturally, a more environmentally friendly silk protein is selected as the matrix material and boron nitride/silk protein thermal conductive composites are prepared by means of ball milling-hot pressing.The morphology, structure and thermal conductivity of the composites are studied.It is shown that the composites exhibit obvious anisotropy of thermal conductivity because h-BN distributes horizontally in the composites.With increasing h-BN content, the thermal conductivity of the composites increases.As h-BN content is 50%, the thermal conductivity of composite reaches 12.42 W/(m·K) in horizontal direction and 0.41 W/(m·K) in perpendicular direction.Infrared thermal imaging results show that the composites have excellent heat transfer performance.

侯文轩(1995-),男,硕士研究生,研究方向为蚕丝基导热复合材料的制备及其性能研究,xue6766168@qq.com