摘要
微型电子器件在运行过程中往往会产生大量热量,提高电子封装材料的导热性能成为了当前亟需解决的难题。聚合物材料目前已成为电子封装材料的首选基底,引入高导热填料虽可有效提升其导热性能,但还需要控制填料的用量以兼顾成本、工艺可拓展性和产品性能。为解决上述问题,以石墨烯微片(GNP)为原料,通过溶剂热法在GNP上原位生长四氧化三铁(Fe_(3)O_(4))亚微米级粒子,得到石墨烯-四氧化三铁杂化物。将上述杂化物作为填料与环氧树脂(EP)混合后,在磁场条件下高温固化制备了GNP@Fe_(3)O_(4)垂直取向的GNP@Fe_(3)O_(4)/EP导热复合材料。当填料含量为25 wt%时,GNP@Fe_(3)O_(4)/EP的热导率可达0.633 W/(m·K),达到了纯EP的375%,在低负载情况下有效提升了环氧树脂基体面外方向的导热能力。
As mcroelectronic devices often generate a lot of heat in the process of operation,improving the thermal conductivity of electronic packaging materials has become an urgent problem to be solved.Polymer materials are now the preferred substrates for electronic packaging materials,with the introduction of high thermal conductivity fillers effectively improving their thermal properties.However,it is still necessary to control the amount of filler to balance cost,process scalability,and product performance.In order to solve the above problems,submicron particles of ferroferric oxide(Fe_(3)O_(4))are grown in situ on GNP by solvothermal method using graphene microsheets(GNP)as raw materials to obtain graphene-ferroferric oxide hybrids.The thermal GNP@Fe_(3)O_(4)/EP composites with vertical orientation of GNP@Fe_(3)O_(4)/EP are prepared by high temperature curing under magnetic field conditions after mixing the above hybrids as fillers with epoxy resin(EP).The thermal conductivity of the composites can reach 0.633 W/(m·K)when the filler content is 25wt%,which is 375%of the thermal conductivity of pure EP.This method effectively improves the thermal conductivity of epoxy resin matrix in the out-of-plane direction under low load.
作者
刘慧瑜
李蕾
张文忠
张岩
LIU Huiyu;LI Lei;ZHANG Wenzhong;ZHANG Yan(School of Textile and Clothing Engineering,Soochow University,Suzhou 215123,Jiangsu,China;Shandong Binzhou Yaguang Towel Co.,Ltd.,Binzhou 256651,Shandong,China)
出处
《纺织工程学报》
2024年第4期25-34,共10页
JOURNAL OF ADVANCED TEXTILE ENGINEERING
关键词
导热复合材料
石墨烯
四氧化三铁
垂直取向结构
热导率
thermally conductive composites
gaphene
ferroferric oxide
vertically oriented structure
thermal conductivity
作者简介
刘慧瑜,女,硕士生,专业方向为纺织科学与工程,E-mail:20234215003@stu.suda.edu.cn;通信作者:张岩,男,教授,研究方向为纺织结构复合材料的力学性能、新型纤维功能化及新型纱线开发,E-mail:yanzhang86@suda.edu.cn。
