Preparation of Conducting Polypyrrole Films on Nonconducting Surfaces
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
A procedure has been found for the growth of conducting polypyrrole films on nonconducting substrates, for example, glass. In the presence of certain oxidizing agents, pyrrole is found to polymerize to produce a coating film on the vessel containing the pyrrole solution and on any other surfaces contacted by the solution. Two successful formulations have been found to date. In the first, pyrrole is dissolved in a toluene solution containing silver perchlorate or silver tetrafluoroborate. On standing overnight, this mixture deposits a conducting polypyrrole film on the inside of the glass container. Similarly, tetrahydrofuran solutions of pyrrole and cupric tetrafluoroborate deposit polypyrrole films on the container and on glass microscope slides inserted into the solution.