Kunpeng Ruan#, Xiao Zhong#, Xuetao Shi*, Jinjin Dang and Junwei Gu*. Liquid crystal epoxy resins with high intrinsic thermal conductivities and their composites: A mini-review. Materials Today Physics, 2021, 20: 100456.  2019IF=10.443.（1区材料科学Top期刊）

https://doi.org/10.1016/j.mtphys.2021.100456

Abstract

Owing to the excellent mechanical properties and thermal stability, outstanding electrical insulation and chemical resistance, as well as easy processing and low cost, epoxy resins are widely used in electronics and electrical fields. However, the intrinsic thermal conductivity coefficients (λ) of the traditional epoxy resins are low, which is far from being able to meet the high thermal conduction/dissipation requirements of high-power electrical equipment or electronic components. By designing and changing the structures of molecules and chain links to obtain special physical structures (such as orientation structure, liquid crystal structure and crystalline structure, etc.), the high intrinsic λ of epoxy resins can be achieved. This paper reviews the classification, preparation methods, research progresses and thermal conduction mechanisms of intrinsically thermally conductive liquid crystal epoxy resins. The research progresses and academic achievements of existing intrinsically thermally conductive liquid crystal epoxy resins and their composites are focused on, and the influencing factors on the intrinsic thermal conductivities of liquid crystal epoxy resins are discussed. Finally, the development trends and prospects of intrinsically thermally conductive liquid crystal epoxy resins and their composites are pointed out.

环氧树脂由于具有优异的力学性能和热稳定性、突出的电气绝缘性和耐化学腐蚀性，以及易成型加工和低成本等优点，广泛应用于电子、电气和电机等领域。然而，传统环氧树脂基体的本征导热系数（λ）低，远不能满足高功率电气设备或电子元器件的高导/散热需求。通过设计和改变分子和链节的结构来获得特殊的物理结构（如取向结构、液晶和结晶结构等），可以实现环氧树脂的本征高导热性能。本文就本征型导热液晶环氧树脂的分类、制备方法、研究进展和导热机理进行了综述，重点讨论了现有本征高导热液晶环氧树脂及其复合材料的研究进展与学术成果，以及液晶环氧树脂本征导热性能的影响因素，最后指出本征型导热液晶环氧树脂基体及其复合材料的发展趋势和应用前景。