Abstract

The behavior of electrical conductivity during the curing of composites based on epoxy resin doped with functionalized single-walled carbon nanotubes (SWNTs) with the application of constant and alternating electric fields was experimentally studied. A temporary shift of the maximum of electrical conductivity with an increase in the electric field amplitude was observed. It was shown that during the electric current flow through the sample, a competition between the processes of agglomeration and orientation of the CNT in an applied electric fields takes place. Such competition simultaneously contributes to the growth of electrical conductivity, the polymerization processes, and complicates the mobility of the CNT in the polymer matrix. It was found that the efficiency of the external direct and alternating electric fields increased with the decrease of carbon nanotubes concentration, and the alternating electric field was preferable for creating a percolation structure in the material.

摘要

实验研究了基于环氧树脂掺杂功能化单壁碳纳米管（SWNTs）的复合材料在恒定和交变电场作用下固化过程中的导电行为。观察到随着电场幅度的增加电导率最大值的暂时偏移。结果表明，在电流流过样品的过程中，在施加的电场中发生了 CNT 的聚集和取向过程之间的竞争。这种竞争同时有助于电导率的增长、聚合过程，并使 CNT 在聚合物基质中的移动性复杂化。