聚合物基导电复合材料几种导电理论的评述

Commentary on Several Conduction Mechanisms of the Conductive Polymer Composites

近年来,有关聚合物基导电复合材料的研究已受到普遍的重视,但对导电复合材料导电机理研究的不足制约了其应用和发展。导电复合材料的导电机理相当复杂,通常可分为导电通路如何形成和材料形成导电通路后如何导电这两个方面来研究。人们提出了许多导电机理模型,详细介绍了渗滤理论、有效介质理论、量子力学隧道效应理论等几种具有代表性的导电理论,对其适用范围、优缺点等进行了评述。通过对这些导电机理的探讨,有助于加深对复合型导电塑料以及其它导电复合材料导电行为的了解。

In recent years,electrically conductive polymer matrix composites have attracted a great deal of scientific interests.But the study on the mechanism of electrical conduction is insufficient,which restricts the developments and applications of these materials.The conduction mechanism of conductive polymer composites is complex which includes the formation of the conductive path and the electron transport mechanism in these paths.The percolation theory,effective medium theory and quantum mechanical tunneling conduction theory are introduced in detail and the applicability of these conduction mechanisms is also discussed.