摘要
采用真空辅助抽滤方法制备了细菌纤维素(BC)/球形氧化铝粒子/改性石墨烯纳米片(SiO_(2)@GNPs)薄膜热界面材料,研究了球形氧化铝粒子粒径对热界面材料形态结构和导热性能的影响。结果表明,球形粒子与二维片状导热粒子复配时,可有效构筑面外方向导热通路。调节氧化铝粒子和改性石墨烯纳米片的直径比可有效调整改性石墨烯纳米片在复合薄膜中在面外方向的取向程度,从而提高复合材料的面外导热系数。随着球形氧化铝的直径从2μm增加到60μm,导热薄膜的面外导热系数从0.5 W/(m·K)提高到4.2 W/(m·K),导热系数提高了7.4倍。
Nano-silica particles were grown on the surface of graphene nanoplates via in-situ growth method to improve the hydrophilicity of graphene nanoplates and the dispersibility in aqueous solution.Using 10%bacterial cellulose(BC),60%spherical alumina oxide and 30%modified graphene nanoplates(SiO_(2)@GNPs),BC/Al2O3/SiO_(2)@GNPs composite films were prepared by vacuum-assisted filtration.The results show that the orientation of SiO_(2)@GNPs in the thickness direction of the composite films can be effectively adjusted by changing the diameter ratio of spherical alumina oxide to SiO_(2)@GNPs.With the increase of the diameter of spherical alumina oxide from 2μm to 60μm,the through-plane thermal conductivity of the films is increased from 0.5 W/(m·K)to 4.2 W/(m·K),showing an increase of 7.4 times.
作者
宋攀
冯昌平
张凯
白露
刘正英
杨鸣波
杨伟
Pan Song;Changping Feng;Kai Zhang;Lu Bai;Zhengying Liu;Mingbo Yang;Wei Yang(College of Polymer Science and Engineering,Stare Key Laboratory of PolymerMaterials Engineering,Sichuan University,Chengdu 610065,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2021年第6期140-145,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金青年基金资助项目(52003170)。
关键词
热界面材料
面外导热通路
导热性能
thermal interface materials
through-plane heat conduction pathways
thermally conductive property
