Micromorphological Structure and Its Forming Mechanisms of Polyacrylonitrile-Based Copper Gradient Composite Film

摘要

In this article,the micromorphological structure of polyacrylonitrile-copper gradient composite film obtained from the electrochemical reduction of a swelling cathode film was investigated wiht a scanning electronic microscope and a transmittance electronic microscope.It was found that the micromorphological structure in deposited phase is constructed with copper particles and sheaves of polyacrylonitrile chains.The diameters of both the copper particles and the sheaves of macromolecules are about 50 nm.Thus the idea of the interpenetration between polymeric matrix and deposited metal is suggested.Under the enhanced power voltage and the reactor temperature,the maximums of current in the loop of reaction system shift to lower electrochemical reaction time.That means the higher value of them makes the higher activity in the two aspects of ion move and ion reduction in sweling cathode film.The dissolving experiment of gradient composite film showed that it does not dissolve in N,N-dimethylformamide,and this further confirmed the interpenetration between the polymer matrix and the deposited copper.