拉伸力场对聚丙烯/石墨烯微片纳米复合材料形态和性能的影响  

Effect of Tensile Force Field on the Morphology and Properties of Polypropylene/Graphene Nanoplatelets Nanocomposites

作　　者：徐子威 黄诗君[1] 张婧婧[1] 秦国锋 蒋培松 XU Ziwei;HUANG Shijun;ZHANG Jingjing;QIN Guofeng;JIANG Peisong(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

出　　处：《中国塑料》2019年第8期56-62,共7页China Plastics

摘　　要：设计了2种挤出机头以产生不同加工力场,研究了聚丙烯(PP)/石墨烯微片(GNPs)纳米复合材料的微观形态、导电及导热性能,分析GNPs在PP基体中的分布形态对复合材料的性能影响。结果表明,收敛流道产生的拉伸力场对GNPs有剥离分散作用,减少GNPs团聚;加入静态混合器后产生的混沌混炼力场能进一步提高GNPs在PP中的分散均匀性,有利于构建导电导热网络,从而提高复合材料的导电导热性能;当GNPs含量为6%(质量分数,下同)时,相比于无静态混合器的拉伸机头,在带静态混合器的拉伸机头挤出下,电导率增大了5个数量级,热导率提高了24.1%。In this work, two kinds of extruder heads were designed to produce different processing force fields. The morphology and electrical and thermal conductivity of polypropylene(PP)/graphene nanoplatelets(GNPs) nanocomposites were investigated, and the effect of distribution of GNPs in the PP matrix on the performance of the nanocomposites was also studied. The results indicated that the tensile force field generated by the convergent flow channel had a peeling and dispersing effect on GNPs and therefore reduced the agglomeration of GNPs. The chaotic mixing force field generated by use of a static mixer further improved the dispersion uniformity of GNPs in the matrix, which facilitated the construction of an electrically conductive and thermally conductive network. As a result, the electrical and thermal conductivity of the nanocomposites was improved. For the nanocomposites containing 6 wt% of GNPs prepared by using a static mixer in the extrusion head, the conductivity was improved by 5 orders of magnitude and the thermal conductivity was improved by 24.1 % compared to the nanocomposites prepared without a static mixer.

关 键 词：石墨烯微片 拉伸力场 混沌混炼力场 导电性能 导热性能 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]