Electrochemical Generation of a Stable Electrically Insulating Organic Layer
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11
The electrochemical oxidation of 4,4'-methylenedianiline in aprotic solvents produces a thin transparent film, about 300 angstroms thick, which coats the electrode evenly. Since the film is not conducting, this method of Preparation conveniently self-heals all of the electrical pin holes. The film is strongly adherent to the surface and is not removed or loosened by soaking in conventional organic solvents, such as CH(3)CN, acetone, DMF, CH(2)Cl(2), etc. The film is not attacked by aqueous acid or amine solvents and is stable when heated up to 260 degrees C in air. Very thin, strongly adherent, stable insulating films which are pin-hole free can also be generated electrochemically with other substituted aniline and phenol derivatives.