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Enhancement of microwave absorption of polyaniline–PbTiO3 composites prepared by using sodium dodecyl benzene sulfonoic acid

Published online by Cambridge University Press:  18 February 2013

Ameena Parveen  and
Aashis S. Roy
Ameena Parveen
Affiliation:
Department of Physics, Government First Grade College, Gurmitkal, Yadgir, 585214 Karnataka, India
Aashis S. Roy*
Affiliation:
Department of Materials Science, Gulbarga University, Gulbarga 585106, Karnataka, India
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Polyaniline (PANI)–PbTiO3 composites were prepared by using different inorganic and organic acids by in situ polymerization technique using sodium dodecyl benzene sulfonic acid as a surfactant. The structural analysis was studied by using x-ray diffraction, and it was found that PANI is amorphous in nature. The scanning electron microscopy studies reveal that they are agglomerated and irregular, and size of these grains increase by increasing the amount of PANI with different organic and inorganic acids. The real part of complex permittivity (εʹ) and imaginary part of complex permittivity (εʹʹ) and the real part of the permeability (μ′) are studied at X-band frequency where (εʹ) and (εʹʹ) decreas with increase in frequencies, whereas μ′ increases with increase in X-band frequency and exhibits a maximum value of 0.87 at the resonance frequency of 9–11 GHz of 30 wt% PbTiO3 in PANI matrix. Reflection loss peak of 30 wt% of PANI–PbTiO3 composites is 28.6 dB at 10.8 GHz, which may be attributed to the maximum reflection of the microwave power for the particular doping concentration.

Keywords

polyaniline compositestangent losspermittivitypermeabilityreflection loss
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 6 , 28 March 2013 , pp. 840 - 847
Copyright
Copyright © Materials Research Society 2013

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