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Preparation, Structural, and Electrical Studies of Polyaniline/ZnFe2O4 Nanocomposites

Prasanna, Gunderi Dhananjaya and Jayanna, Halepoojar Siddalingappa and Prasad, Vishnu (2011) Preparation, Structural, and Electrical Studies of Polyaniline/ZnFe2O4 Nanocomposites. In: Journal of Applied Polymer Science, 120 (5). pp. 2856-2862.

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Polyaniline/ZnFe2O4 nanocomposites were synthesized by a simple and inexpensive one-step in situ polymerization method in the presence of ZnFe2O4 nanoparticles. The structural, morphological, and electrical properties of the samples were characterized by wide angle X-ray diffraction (WAXD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). WAXD and SEM revealed the formation of polyaniline/ZnFe2O4 nanocomposites. Infrared spectroscopy indicated that there was some interaction between the ZnFe2O4 nanoparticles and polyaniline. The dc electrical conductivity measurements were carried in the temperature range of 80 to 300 K. With increase in the doping concentration of ZnFe2O4, the conductivity of the nanocomposites found to be decreasing from 5.15 to 0.92 Scm(-1) and the temperature dependent resistivity follows ln rho(T) similar to T-1/2 behavior. The nanocomposites (80 wt % of ZnFe2O4) show a more negative magnetoresistance compared with that of pure polyaniline (PANI). These results suggest that the interaction between the polymer matrix PANI and zinc nanoparticles take place in these nanocomposites. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 120: 2856-2862, 2011

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Keywords: conducting polymers;polyaniline;ZnFe2O4;nanocomposites; FTIR; conductivity
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 12 Apr 2011 11:46
Last Modified: 12 Apr 2011 11:46
URI: http://eprints.iisc.ac.in/id/eprint/36574

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