Novel high dielectric constant nanocomposites of polyaniline dispersed with γ-Fe 2O 3 nanoparticles

N. N. Mallikarjuna, S. K. Manohar, P. V. Kulkarni, A. Venkataraman, T. M. Aminabhavi

Research output: Contribution to journalArticle

74 Scopus citations

Abstract

Novel nanocomposites of polyaniline dispersed with γ-Fe 2O 3 nanoparticles were prepared by the in situ polymerization of aniline in the presence of ammonium peroxysulfate as an oxidizing agent. Dielectric constants of the derived composites varied with the composition of γ-Fe 2O 3 present in the matrix. A maximum dielectric constant of ∼5500 was achieved when 10 mass % γ-Fe 2O 3 nanoparticles were present. Nanocomposites were characterized by X-ray diffraction, Fourier transform infrared, scanning electron microscopy, and thermal analytical techniques. Conductivity increased marginally by increasing the amount of γ-Fe 2O 3 in the matrix. Dielectric constants increased 100-150 times compared to plain polyaniline matrix and were 20-40 times higher than that of γ-Fe 2O 3 nanoparticles.

Original languageEnglish (US)
Pages (from-to)1868-1874
Number of pages7
JournalJournal of Applied Polymer Science
Volume97
Issue number5
DOIs
StatePublished - Sep 5 2005

Keywords

  • Dielectric properties
  • Morphology
  • Nanocomposites
  • Polyaniline
  • X-RD

ASJC Scopus subject areas

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

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    Mallikarjuna, N. N., Manohar, S. K., Kulkarni, P. V., Venkataraman, A., & Aminabhavi, T. M. (2005). Novel high dielectric constant nanocomposites of polyaniline dispersed with γ-Fe 2O 3 nanoparticles. Journal of Applied Polymer Science, 97(5), 1868-1874. https://doi.org/10.1002/app.21405