writer：Yongqiang Guo, Kunpeng Ruan, Xuetao Shi, Xutong Yang and Junwei Gu*
keywords：thermal conductivities， polymer composites
source：期刊
specific source：Composites Science and Technology
Issue time：2020年

It is of considerable scientific and technological importance to enhance the thermal conductivity coefficient (λ) values of the polymers and polymer composites. Limited understanding of heat transfer in polymers and polymer composites imposes restrictions on the designing and fabricating better thermally conductive polymers and polymer composites. This review attempts to help understand the thermal conduction mechanisms by analyzing the effects of different components in polymers and polymer composites on heat transfer. Factors of micro- and macro- characteristics, such as chain structures, interfaces, functionalization and processing techniques, etc., are all illustrated to elucidate their impacts on the thermal conductivities. In general, chain structures of polymers, intrinsic λ values of thermally conductive fillers and interfacial thermal resistances are the main and internal factors to determine the λ values of polymers and polymer composites. Meantime, processing and environmental factors are only auxiliary factors to improve the thermal conductivities. We expect this review will give some guidance to the future studies in thermally conductive polymers and polymer composites.

高导热聚合物及其复合材料的研究和开发已成为功能复合材料的研究热点之一。深入认识和理解聚合物及其复合材料导热性能的各项影响因素对于设计和制备导热/承载一体化聚合物及其复合材料具有重要理论指导意义。本文综述了近些年国内外学者在导热材料领域的最新研究成果，重点阐述了导热聚合物及其复合材料导热性能的各种内在影响因素。微纳尺度上涉及聚合物链结构及聚集态结构、填料/基体界面性能等；宏观尺度上涉及填料形状&尺寸、加工方法等。希望通过本文的归纳总结能为导热/承载一体化聚合物及其复合材料的设计研发提供一种新方法、理论依据和技术支撑，并指导该类材料在有机太阳能电池、储能材料、特高压输电设备、大功率LEDs和5G通讯服务等高导热系统中的生产和应用。