马来酸酐接枝聚乙烯/石墨导电纳米复合材料的研究

用溶液插层法制备了马来酸酐接枝聚乙烯(MGPE)/膨胀石墨(EG)导电纳米复合材料,以熔体混合法作对照,通过电导率测试和X射线衍射、透射电镜、扫描电镜和光学显微分析,研究了复合材料的制备方法-形态结构-导电性能关系和导电通路形成机理。溶液插层法复合材料的逾渗阈值(1.65%体积)仅约为熔体混合法复合材料(3.03%体积)的一半。上述复合材料的导电行为和差异可用统计逾渗理论结合材料的形态结构特征来说明。

Study on maleic anhydride grafted polyethylene/graphite electrically conductive nanocomposites

Maleic anhydride grafted polyethylene (MGPE)/expanded graphite (EG) electrically conductive nanocomposites were prepared via solution intercalation.In contrast to melt mixing,the relationships between preparation method,morphological structure and conductivity of the composites,together with the formation mechanism of conduction paths in them,were studied by using measurement of volume conductivity and analyses of X ray diffractometry(XRD),transmission electronic microscopy (TEM) and scanning electronic microscopy (SEM) and OM(Optical Microanalysis) percolation threshold of the solution intercalation-nanocomposites (1.65vol%) is about a half of that of the melt mixing-normal composites.The conductive behavior and its difference of the above composites could be rationally explained by the statistic percolation theory combined with their morphological and structural characteristics.