This paper is CEPS Communication No. 55.
Novel high dielectric constant nanocomposites of polyaniline dispersed with γ-Fe2O3 nanoparticles†
Article first published online: 21 JUN 2005
Copyright © 2005 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 97, Issue 5, pages 1868–1874, 5 September 2005
How to Cite
Mallikarjuna, N. N., Manohar, S. K., Kulkarni, P. V., Venkataraman, A. and Aminabhavi, T. M. (2005), Novel high dielectric constant nanocomposites of polyaniline dispersed with γ-Fe2O3 nanoparticles. J. Appl. Polym. Sci., 97: 1868–1874. doi: 10.1002/app.21405
- Issue published online: 21 JUN 2005
- Article first published online: 21 JUN 2005
- Manuscript Accepted: 27 SEP 2004
- Manuscript Received: 24 AUG 2004
- University Grants Commission, New Delhi, India
- dielectric properties;
Novel nanocomposites of polyaniline dispersed with γ-Fe2O3 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-Fe2O3 present in the matrix. A maximum dielectric constant of ∼5500 was achieved when 10 mass % γ-Fe2O3 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-Fe2O3 in the matrix. Dielectric constants increased 100–150 times compared to plain polyaniline matrix and were 20–40 times higher than that of γ-Fe2O3 nanoparticles. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1868–1874, 2005