柔性石墨烯/聚氨酯导热复合薄膜的制备与性能  

Preparation and properties of thermally conductive graphene/polyurethane composite films

作　　者：于富豪 陈龙[1] 刘泉 方泽 余鹏祥 张建安[1,2,3] YU Fu-hao;CHEN Long;LIU Quan;FANG Ze;YU Peng-xiang;ZHANG Jian-an(School of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China;Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Engineering Laboratory of High Performance Waterborne Polymer Materials of Anhui Province,Hefei 230601,China)

机构地区：[1]安徽大学化学化工学院,安徽合肥230601 [2]安徽大学物质科学与信息技术研究院,安徽合肥230601 [3]安徽省水基高分子材料高性能化工程实验室,安徽合肥230601

出　　处：《应用化工》2022年第S01期1-4,共4页Applied Chemical Industry

基　　金：国家自然科学基金项目(51973001);安徽高校自然科学研究重大项目(KJ2019ZD01);国家大学生创新创业训练计划项目(202010357037)。

摘　　要：以鳞片石墨为原料,N,N-二甲基甲酰胺(DMF)为溶剂,采用液相剥离法,获得了稳定的石墨烯(GN)分散液,以其为导热填料,制备了柔性石墨烯/热塑性聚氨酯(GN/TPU)导热复合薄膜。采用紫外可见光谱(UV-vis)、透射电镜(TEM)和拉曼光谱(Raman)对剥离的GN进行了表征,并对柔性复合薄膜的力学性能和导热性能进行了测试。结果表明,所制备的GN分散液具有优异的稳定性,GN为少层结构(4~5层)。当GN用量为0.5%时,所得柔性GN/TPU复合薄膜拉伸强度达到最大值为61.4 MPa、垂直方向导热系数达到最大值为0.86 W/(m·K),较纯TPU分别提高了12.8%和300%。Stable graphene(GN)dispersion was prepared by liquid phase exfoliation method and followed by synthesis of GN/thermoplastic polyurethane(GN/TPU)thermally conductive composite films,which empolyed graphite as raw material and N,N-dimethylformamide(DMF)as solvent.UV-vis,TEM and Raman results demonstrated that the prepared GN dispersion possessed excellent stability,high quality and few layered structures(4~5 layers).The mechanical and thermally conductive results indicated that the tensile strength and thermally conductivity of composite film was 61.4 MPa and 0.86 W/(m·K)when 0.5%of GN was added.The impressive performance of GN/TPU was 12.8%and 300%times than that of the pure TPU,respectively.

关 键 词：石墨烯 液相剥离 TPU 导热 复合薄膜 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]