BigPatents India

This invention relates to a process for preparation of doped conducting polymer film. More particularly it relates to deposition of polyaniline films on negatively charged electrode in an electrochemical bath . The present invention provides a process for the preparation of doped conducting polymer film which comprises coating a substrate with an adhesion promoter film, depositing the conducting metal film on a substrate, placing the metal coated substrate in an electrochemical cell with three electrode configuration having reference, counter and working electrode and an electrolyte containing 0.01to 0.5mol of monomer, protonic acid and .001 to 2.0 mole of an initiator, applying a steady negative potential of -0.3 to -1.1 volts for a period ranging between 30 to 150 min to obtain the desired polyaniline film deposited on the cathode.