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

doi:10.1002/app.21405

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 journal › Article › peer-review

89 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 language	English (US)
Pages (from-to)	1868-1874
Number of pages	7
Journal	Journal of Applied Polymer Science
Volume	97
Issue number	5
DOIs	https://doi.org/10.1002/app.21405
State	Published - 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

Access to Document

10.1002/app.21405

Cite this

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

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.",

keywords = "Dielectric properties, Morphology, Nanocomposites, Polyaniline, X-RD",

author = "Mallikarjuna, {N. N.} and Manohar, {S. K.} and Kulkarni, {P. V.} and A. Venkataraman and Aminabhavi, {T. M.}",

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AU - Mallikarjuna, N. N.

AU - Manohar, S. K.

AU - Kulkarni, P. V.

AU - Venkataraman, A.

AU - Aminabhavi, T. M.

PY - 2005/9/5

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N2 - 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.

AB - 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.

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KW - Morphology

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