Electrochemical deposition of polyaniline-polypyrrole composite coatings on aluminum

Gouri Smitha Akundy, Ramakrishnan Rajagopalan, Jude O. Iroh

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The electrodeposition of polyaniline-polypyrrole composite coatings on aluminum was successfully performed by using cyclic voltammetry. Oxalic acid was used as the electrolyte. Electrodeposition was carried out at a scan rate of 20 mV/s by varying the number of cycles. An anodic peak current at around -0.1 V versus saturated calomel electrode (SCE) was observed in the cyclic voltammograms. This peak is clue to the oxidation and adsorption of hydrogen. The cyclic voltammograms also show another anodic peak current at around 1.0 V versus SCE, which is the characteristic peak of the polyaniline-polypyrrole composite. The behavior of this peak with respect to the number of cycles is discussed in detail. A corresponding cathodic peak current at around -0.7 V versus SCE was also observed in the cyclic voltammograms. The infrared spectra of the composite coatings revealed the infrared peaks of both polypyrrole and polyaniline. The scanning electron micrographs of the coatings indicate a morphology completely different from its homopolymers.

Original languageEnglish (US)
Pages (from-to)1970-1977
Number of pages8
JournalJournal of Applied Polymer Science
Volume83
Issue number9
DOIs
StatePublished - Feb 28 2002

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Composite coatings
Polypyrroles
Polyaniline
Aluminum
Electrodeposition
Electrodes
Infrared radiation
Oxalic Acid
Oxalic acid
Homopolymerization
Electrolytes
Cyclic voltammetry
Hydrogen
Scanning
Adsorption
Coatings
Oxidation
Electrons
Composite materials
calomel

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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abstract = "The electrodeposition of polyaniline-polypyrrole composite coatings on aluminum was successfully performed by using cyclic voltammetry. Oxalic acid was used as the electrolyte. Electrodeposition was carried out at a scan rate of 20 mV/s by varying the number of cycles. An anodic peak current at around -0.1 V versus saturated calomel electrode (SCE) was observed in the cyclic voltammograms. This peak is clue to the oxidation and adsorption of hydrogen. The cyclic voltammograms also show another anodic peak current at around 1.0 V versus SCE, which is the characteristic peak of the polyaniline-polypyrrole composite. The behavior of this peak with respect to the number of cycles is discussed in detail. A corresponding cathodic peak current at around -0.7 V versus SCE was also observed in the cyclic voltammograms. The infrared spectra of the composite coatings revealed the infrared peaks of both polypyrrole and polyaniline. The scanning electron micrographs of the coatings indicate a morphology completely different from its homopolymers.",
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Electrochemical deposition of polyaniline-polypyrrole composite coatings on aluminum. / Akundy, Gouri Smitha; Rajagopalan, Ramakrishnan; Iroh, Jude O.

In: Journal of Applied Polymer Science, Vol. 83, No. 9, 28.02.2002, p. 1970-1977.

Research output: Contribution to journalArticle

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