Electrochemically deposited polypyrrole films and their characterization


Tietje-Girault, J., Ponce de León, C.A. and Walsh, F.C (2007) Electrochemically deposited polypyrrole films and their characterization. Surface and Coating Technology, 201, (12), 6025-6034. (doi:10.1016/j.surfcoat.2006.11.009).

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Description/Abstract

Ionically conductive polypyrrole films have been deposited at 295 K from anhydrous acetonitrile, acetonitrile/H2O and NaBF4 aqueous solutions onto platinum, mild steel and stainless steel discs, using cyclic voltammetry, potentiostatic and galvanostatic techniques. Cyclic voltammetry of the polymer films has been studied as a function of water content of the acetonitrile solvent, polypyrrole concentration and potential sweep rate. Potentiostatic growth of thicker (<30 micron) films on stainless steel allowed free-standing polypyrrole membranes to be produced. Well adherent and conductive films were deposited at constant potential in stirred solutions from acetonitrile electrolytes containing 1% (v/v) of water. The membrane resistivity of the reduced films in 0.5 mol dm-3 KCl(aq) at 295 K was ≈ 1 x 106 ohm cm, while the resistivity of the oxidised membrane was 2700 ohm cm.

Item Type: Article
Related URLs:
Keywords: conductive polymers, polymer membrane, polypyrrole formation, pyrrole oxidation.
Subjects: T Technology > TP Chemical technology
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 43883
Date Deposited: 01 Feb 2007
Last Modified: 27 Mar 2014 18:28
Contact Email Address: capla@soton.ac.uk
URI: http://eprints.soton.ac.uk/id/eprint/43883

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