聚丙烯/石墨烯微片纳米复合材料的导电导热性能  

Electrical and Thermal Conductivity of Polypropylene/Graphene Nanoplatelet Nanocomposite

作　　者：陈宇强[1] 肖小亭[1] 张婧婧[1] 洪新密 何穗华[1] 吕朋荣 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《塑料》2016年第5期57-59,121,共4页Plastics

基　　金：广东省省级科技计划项目(2013B090600069)

摘　　要：将聚丙烯(PP)与石墨烯微片(GNP)用双螺杆挤出机进行熔融共混制备PP/GNP纳米复合材料,研究复合材料的形态结构、导电和导热性能。结果表明:复合材料的导电渗流阈值为7%,GNP表现为相互接触,并形成三维导电网络结构,电导率为7.3×10^(-5)S/m,是纯PP的108倍,导热性能也呈现较为明显的上升趋势。当GNP含量进一步增加时,剥离程度没有改变,出现了层状堆积的GNP,导致电性能提高不大,导热性能增幅也放缓。Polypropylene （PP）/graphene nanoplatelet（GNP） nanocomposite were prepared using a twin-screw extruder. Morphology,electrical conductivity and thermal conductivity of PP/GNP nanocomposite had been studied. The composite exhibited a conductive percolation threshold at 7% GNP loading, and morphological results confirmed the GNP were physically in contact forming a 3 D network within the PP matrix, electric conductivity reached 7.3 ×10 -5 S/m which was l0s times higher than that of pure PP, thermal conductivity also showed obvious upward trend. However,further increasing GNP loading had little contribution to increasing the electrical conductivity and thermal conductivity. Because stacked graphene layers survived in the nanocomposite and GNP exploited didn＇t increased with high GNP loading.

关 键 词：导电性 导热性 石墨烯微片 渗流阈值 复合材料 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]