[Mater Today Phys]Liquid crystal epoxy resins with high intrinsic thermal conductivities and their composites: A mini-review
writer：Kunpeng Ruan#, Xiao Zhong#, Xuetao Shi*, Jinjin Dang and Junwei Gu*
keywords：Epoxy resins,High intrinsic thermal conductivities,Preparation methods,Thermal conduction mechanisms
source：期刊
specific source：Materials Today Physics
Issue time：2021年
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.
環氧樹脂由于具有優異的力學性能和熱穩定性、突出的電氣絕緣性和耐化學腐蝕性，以及易成型加工和低成本等優點，廣泛應用于電子、電氣和電機等領域。然而，傳統環氧樹脂基體的本征導熱系數（λ）低，遠不能滿足高功率電氣設備或電子元器件的高導/散熱需求。通過設計和改變分子和鏈節的結構來獲得特殊的物理結構（如取向結構、液晶和結晶結構等），可以實現環氧樹脂的本征高導熱性能。本文就本征型導熱液晶環氧樹脂的分類、制備方法、研究進展和導熱機理進行了綜述，重點討論了現有本征高導熱液晶環氧樹脂及其復合材料的研究進展與學術成果，以及液晶環氧樹脂本征導熱性能的影響因素，最后指出本征型導熱液晶環氧樹脂基體及其復合材料的發展趨勢和應用前景。