ELECTROCHEMICAL SYNTHESIS OF POLYACRYLONITRILE (PAN)-COPPER COMPOSITECONDUCTIVE FILM

Polyacrylonitrile-copper composite film was synthesized by electrochem ical reduction of a swollen film made by blend solution of a polyacryl onitrile-copper(II) ion which was coated on a electrode surface. The m orphological structure of this composite film in the cross section was measured by a scanning electronic microscope and it showed three comp osite layers: a densely deposited layer, a transition layer, and an un deposited layer. The deposited layer consisted of the copper element a nd gave a high conductivity (10(0) S-cm(-1)). In the transition layer, there was a great amount of a tree shaped copper deposit, but no such deposit can be found in the undeposited layer. The experiment data sh owed that the conductivity of the film increases with increase of elec trochemical reduction time and decreases with increase of ratio of nit rile group to the copper(II) ion. The viscosity of polyacrylonitrile-c opper(II) ion solution is enhanced by a decrease of the ratio of the n itrile group to the copper(II) ion. (C) 1996 John Wiley & Sons, Inc.