【摘要】 磨盘碾磨固相剪切复合技术(S3C)是制备聚合物 石墨导电复合材料的有效途径,所得聚丙烯 膨胀石墨复合材料具有纳米插层复合结构,石墨纳米片层的相互搭接可形成导电网络,具有纳米间隙的石墨插层结构可形成隧道电流,从而大幅度降低复合体系的导电逾渗阈值,在低填充量实现聚合物复合材料高电导性,与熔体共混相比,导电逾渗阈值由4 .3vol%降低到0 . 5 5vol% ,在石墨含量为4 .0 1vol%时,电导率提高10个数量级.更多还原

【Abstract】 Solid-state shear compounding technology (S3C) based on pan-milling is an effective method to prepare polymer/graphite electrical conductive composite s with nano intercalating structure.The graphite nanosheets may touch each other to form a conductive network,and the intercalating graphite layers with nano s cale gaps may induce tunnel current,therefore the percolation threshold value of the co mposites decreases remarkably,and their electrical conductivities increase qui te a lot at low graphite loading levels.Compared with the PP/graphite composite prepared via conventional melt mixing,the percolation threshold of the PP/YEP25 0 nanocomposites prepared via S3C decreases from 4.3 vol% to 0.55 vol%,and t heir conductivity is in 10 magnitudes of order higher than that of conventional PP/graphite composites at a graphite content of 4.01 vol%.更多还原