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Journal of Nanotechnology
Volume 2016, Article ID 5135420, 9 pages
http://dx.doi.org/10.1155/2016/5135420
Research Article

Synthesis of Graphene-Based Nanocomposite and Investigations of Its Thermal and Electrical Properties

1Department of Physics, KIIT University, Bhubaneswar, Odisha 751024, India
2PG Department of Physics, College of Engineering and Technology, Bhubaneswar, Odisha 751003, India

Received 15 April 2016; Revised 21 June 2016; Accepted 22 June 2016

Academic Editor: Simon Joseph Antony

Copyright © 2016 Manoj Kumar Pati et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We describe the synthesis of acid functionalized graphene (GE) which is grafted to chitosan (CH) by first reacting the oxidized GE with thionyl chloride to form acyl-chlorinated GE. This product is subsequently dispersed in chitosan and covalently grafted to form GE-chitosan. GE-chitosan is further grafted onto polymetanitroaniline (PMNA) by free radical polymerization conditions to yield GE-CH-PMNA. We have characterized the structure of synthesized GE-CH-PMNA composites by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy, and conductivity measurements. XRD data suggest the strongly crystalline character of the prepared specimen. Our measurement shows that the dielectric constants of these nanocomposites are remarkably enhanced due to interfacial polarization effect. This study demonstrates that functionalized graphene sheets are ideal nanofillers for the development of new polymer composites with high dielectric constant values.