Preparation and properties of boron nitride/silk thermal conductive composites
HOU Wen-xuan1,2, LV Zhe1,2, LIU Xiang-lan1, ZHANG Xian1, GONG Yi1, TIAN Xing-you1
1. Key Laboratory of Photovoltaic and Energy Conservation Materials, Solid State Physics Research Center, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; 2. University of Science and Technology of China, Hefei 230026, China
Abstract: 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.
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