聚酰亚胺薄膜材料的各向异性导热行为研究与进展  

Research Progress in Anisotropic Thermal Conduction Behavior of Polyimide Films

作　　者：高梦岩 王畅鸥 贾妍 翟磊[1] 莫松[1] 何民辉[1] 范琳[1,2] Meng-yan Gao;Chang-ouWang;Yan Jia;Lei Zhai;Song Mo;Min-hui He;Lin Fan(Key Laboratory of Science and Technology on High-tech Polymer Materials,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190;School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院化学研究所极端环境高分子材料重点实验室,北京100190 [2]中国科学院大学化学科学学院,北京100049

出　　处：《高分子学报》2021年第10期1283-1297,共15页Acta Polymerica Sinica

基　　金：北京市自然科学基金(基金号2202068)资助项目.

摘　　要：聚酰亚胺薄膜材料在集成电路、光电显示、柔性电子等领域具有广泛应用,然而其较差的导热性能越来越无法满足器件的快速散热需求.在保持耐热、力学等优势性能基础上,发展新一代高导热各向异性的聚酰亚胺薄膜材料成为国内外研究的重点.本文系统总结了聚酰亚胺本征薄膜及聚酰亚胺/导热填料复合薄膜在各向异性导热行为方面的研究进展,重点从聚酰亚胺分子结构设计、各向异性导热机理、填料取向排列、基体相态结构等方面进行了详细介绍.通过对非晶型与液晶型两类聚酰亚胺结构特点的分析,阐述了聚酰亚胺本征薄膜的分子结构与各向异性导热性能的关系;介绍了基于导热填料取向排列和基于基体相分离结构两类复合薄膜的填料取向与导热通路构建方法,深入分析了导热填料在基体中的分散形态对薄膜各向异性导热行为的影响,最后对导热聚酰亚胺薄膜材料面临的挑战进行了总结与展望.Polyimide films are widely used in the fields of advanced integrated circuits,optoelectronic displays,flexible functional electronics,etc.With the further development of application,the poor thermal conductivity of polyimide film is unable to meet the rapid heat dissipation requirements of electronic devices.In order to improve the thermal conductivity of films and maintain the superior performance of polyimide materials,a new generation of anisotropic polyimide films with high thermal conductivity has become the focus of research.Due to the obvious anisotropy in the structure or properties of polyimides and thermally conductive fillers,the thermal conductivity behavior of both polyimide intrinsic films and polyimide-based composite films mostly shows significant anisotropy.The molecular structures and chain aggregation of polyimides,orientation arrangement of thermally conductive fillers,as well as the matrix morphology will all exert an important impact on the thermal conductivity and their anisotropic behavior of films.Here,we systematically summarize the research progress on anisotropic thermal conduction behavior of polyimide intrinsic films and polyimide-based composite films.The molecular structure design of polyimides,anisotropic heat conduction mechanism,filler orientation and matrix phase structures are discussed in detail.The effect of structural characteristics of polyimide intrinsic films on their thermal conductivity in different directions is presented,and the related research results of amorphous polyimides and liquid crystalline polyimides are respectively introduced.Composite films based on the orientation arrangement of thermally conductive fillers are described,and the other polyimide-based composite films with the matrix phase separation structures are also concluded.The relationship between the orientation or dispersed state of thermally conductive fillers in the matrix and the anisotropic thermal conduction behavior of two types composite films are particularly investigated.Finally,the chal

关 键 词：聚酰亚胺 本征薄膜 复合薄膜 导热行为 各向异性 

分 类 号：TB383.2[一般工业技术—材料科学与工程]