改进静电植绒法制备沥青基碳纤维垂直排列高导热热界面材料  

Fabrication of vertically aligned pitch-based carbonfiberfilled thermal interface materials with high thermal conductivity through improved electrostaticflocking method

作　　者：武美霞 欧阳江坤 侯梦迪 洪建婷 丁鹏[1] 王金合[1] WU Meixia;OUYANG Jiangkun;HOU Mengdi;HONG Jianting;DING Peng;WANG Jinhe(Nano-Science&Technology Research Center,Shanghai University,Shanghai 200444,China;School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学纳米科学与技术研究中心,上海200444 [2]上海大学材料科学与工程学院,上海200444

出　　处：《上海大学学报(自然科学版)》2025年第1期105-114,共10页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目 (52073168)。

摘　　要：利用二次静电植绒和底膜收缩的方法,成功制备致密垂直排列的沥青基碳纤维/硅胶复合热界面材料.研究了改进静电植绒法对导热材料的密度、垂直度、导热系数及传热效果的影响.结果显示,在相同植绒时间下,二次植绒的沥青基碳纤维植绒密度和垂直排列状态明显优于一次植绒的沥青基碳纤维.在二次植绒的条件下进行底膜收缩,当底膜收缩率为33%时,热界面材料的垂直导热系数可达27.4 W/(m·K).所制备材料展现出良好的垂直导热性能,所采用的制备工艺具有良好的工业放大可能性,具有在电子芯片散热领域发展的潜力.A method involving secondary electrostaticflocking was used to prepare a ver-tically aligned array of pitch-based carbonfibers.The effects of the improved electrostaticflocking method on the density,perpendicularity,thermal conductivity,and heat trans-fer of the thermally conductive materialsfilled with pitch-based carbonfiber arrays were studied.The results show that pitch-based carbonfibers prepared with secondaryflocking exhibited a significantly improved density and vertical alignment compared with those prepared with one-timeflocking under the sameflocking time.Additionally,when thefilm was contracted by 33%,the thermal interface material achieved a high vertical thermal conductivity of 27.4 W/(m·K).The material exhibited a good vertical thermal conductivity,and the preparation process shows great promise for industrial scalability and potential applications in thefield of electronic chip heat dissipation.

关 键 词：改进静电植绒 热界面材料 沥青基碳纤维 (pitch-based CARBON FIBER PCF) 垂直排列 

分 类 号：TB332[一般工业技术—材料科学与工程]