石墨烯微片的尺寸和形态对聚丙烯基纳米复合材料导电导热性能的影响  

Effects of Size and Shape of Graphene Nanoplatelet (GNP) on Electrical and Thermal Conductivity of PP/GNP Nanocomposites

作　　者：余浩斌 张婧婧[1] 何穗华[1] 杨涛 YU Haobin;ZHANG Jingjing;HE Suihua;YANG Tao(School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学材料与能源学院,广州510006

出　　处：《中国塑料》2018年第3期51-58,共8页China Plastics

摘　　要：通过熔融共混法制备了5种不同石墨烯微片(GNP)的聚丙烯(PP)/GNP纳米复合材料,采用电子和光学显微镜等仪器和导电导热等性能测试研究了GNP的尺寸和含量对PP基纳米复合材料导电导热性能的影响。结果表明,同一厚度的GNP片径越大,片层间的接触面积也越大,复合材料导电导热性能越好;同一片径的GNP,片层薄的在PP基体中的剥离程度和分散程度好,相应的PP/GNP纳米复合材料的导电导热性能好;而且GNP含量的改变对PG-100、PG-030和PG-G5导电导热性能的影响是不同的;其中PG-030导电网络最先形成,渗流阈值最低,而PG-G5在高含量时导电和导热率最高。PP/graphene nanoplatelet(GNP)nanocomposites were prepared by using five different type of GNP fillers through a melt blending methods,and effects of size and content of GNP on electrical and thermal conductivity of nanocomposites were investigated.The results indicated that,at the same thickness of GNP?GNP with larger diameters could provide a greater contact area between the layers,thus improving the electrical and thermal conductivity of the nanocomposites.Moreover,at the same diameter of GN P,the thinner thickness resulted in a better dispersion of GNP in the matrix,and the nanocomposites achieved an improvement in electrical and thermal conductivity accordingly.It was also found that the effects of GNP content on the electrical and thermal conductivity were different for the samples of PG-100,PG-030 and PG-G5.PG-030 could easily form a conductive network at the lowest percolation threshold,and however,PG-G5 exhibited the highest electrical conductivity and thermal conductivity at a high content of GNP.

关 键 词：聚丙烯 纳米复合材料 石墨烯微片 微观形态 导电性能 导热性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]