一种石墨烯/高分子复合电热材料渗流阈值确定的模拟方法  

A Simulation Method for the Determination of Percolation Threshold of Graphene/Polymer Electrothermal Materials

作　　者：李言 龚良发 刘太奇[1] LI Yan;GONG Liangfa;LIU Taiqi(Environmental Materials Research Center,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院环境材料研究中心,北京102617

出　　处：《材料科学与工程学报》2023年第5期786-790,817,共6页Journal of Materials Science and Engineering

基　　金：北京市创新平台建设—北京石油化工学院材料学创新平台建设资助项目(PXM019-014222-000052)。

摘　　要：通过计算机模拟建立了一种确定导电填料/高分子复合材料理论渗流阈值的方法。首先,通过以一定比例混合而构成的二相石墨烯/聚氨酯复合材料建模;其次,利用有效介质理论进行计算机模拟计算,得出石墨烯/聚氨酯二相复合电热材料理论渗流阈值。模拟结果表明石墨烯/聚氨酯复合材料中,当石墨烯添加量为3.4 wt%时,该复合电热材料达到了理论渗流阈值。实验以上述模拟结果为基础,采用溶液共混法成功制备出了石墨烯/聚氨酯复合水溶液;实验结果表明,该石墨烯浆料中石墨烯添加量在3.7 wt%时,电热复合材料达到渗流阈值,表明该理论模拟结果与实际实验结果相吻合。使用实验制备的石墨烯/聚氨酯浆料涂覆而成的电热网状材料,在24 V时温度可达50℃。A computer simulation method was firstly used to determine the theoretical percolation threshold of the conductive filler/polymer composites.Firstly,the model by mixing two-phase graphene/polyurethane composite in a certain proportions was set up,Secondly,effective medium theory is used for the computer simulation calculation to obtain the theoretical percolation threshold of the two-phase graphene/polyurethane electrothermal material.The simulation results show that the electrothermal composite reaches the theoretical percolation in a graphene addition amount of 3.4 wt%.Based on the above simulation results,a graphene/polyurethane composite aqueous solution was successfully prepared by the solution blending method.Experimental results show that the electrothermal composite material reaches the percolation threshold by the use of 3.7 wt%graphene content.Finally,the mesh electrothermal material was prepared by coating the graphene/polyurethane slurry,and electrothermal temperature of the mesh is 50℃at 24 V.

关 键 词：模拟仿真 石墨烯 聚氨酯 渗流阈值 

分 类 号：TB332[一般工业技术—材料科学与工程]