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Journal of Nanomaterials
Volume 2012 (2012), Article ID 198973, 6 pages
http://dx.doi.org/10.1155/2012/198973
Research Article

Synthesis, Characterization, and Microwave-Absorbing Properties of Polypyrrole/MnFe2O4 Nanocomposite

1Department of Chemistry, Faculty of Science, Islamic Azad University, Islamshahr Branch, Tehran, Iran
2Young Researchers Club, Islamic Azad University, Central Tehran Branch, Tehran, Iran

Received 24 January 2012; Revised 17 March 2012; Accepted 31 March 2012

Academic Editor: Yi Du

Copyright © 2012 Seyed Hossein Hosseini and Ahmad Asadnia. 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

Conductive polypyrrole (PPy)-manganese ferrite (MnFe2O4) nanocomposites with core-shell structure were synthesized by in situ polymerization in the presence of dodecyl benzene sulfonic acid (DBSA) as the surfactant and dopant and iron chloride (FeCl3) as the oxidant. The structure and magnetic properties of manganese ferrite nanoparticles were measured by using powder X-ray diffraction (XRD) and vibrating sample magnetometer (VSM), respectively. Its morphology, microstructure, and DC conductivity of the nanocomposite were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and four-wire technique, respectively. The microwave-absorbing properties of the nanocomposite powders dispersing in resin acrylic coating with the coating thickness of 1.5 mm were investigated by using vector network analyzers in the frequency range of 8–12 GHz. A minimum reflection loss of −12 dB was observed at 11.3 GHz.