Saini, Parveen and Choudhary, Veena and Singh, B. P. and Mathur, R. B. and Dhawan, S. K. (2011) Enhanced microwave absorption behavior of polyaniline-CNT/polystyrene blend in 12.4–18.0 GHz range. Synthetic Metals, 161 (15-16). pp. 1522-1526. ISSN 0379-6779

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Abstract

Blends of polystyrene with polyaniline (PANI) coated multiwalled carbon nanotubes (MWCNTs) were designed which inherit dielectric and magnetic attributes from PANI and MWCNT respectively. The high resolution transmission electron microscopy image shows the PANI coating over MWCNT containing entrapped Fe catalyst. These blends show absorption dominated total shielding effectiveness (SET) of −45.7 dB (>99.99% attenuation) in the 12.4–18.0 GHz range, suggesting their utility for making efficient microwave absorbers. The enhanced SET was ascribed to optimization of conductivity, skin-depth, complex permittivity and permeability. A good agreement between theoretical and experimental shielding measurements was also observed.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	Conducting polymer polyaniline; Carbon nanotube (CNT); Microwave absorption; Electromagnetic interference (EMI); shielding effectiveness; High resolution transmission electron microscopy (HR-TEM); Electrical conductivity
Subjects:	Materials Science Applied Physics/Condensed Matter Physics Polymer Science
Divisions:	UNSPECIFIED
Depositing User:	Mr. Abhishek Yadav
Date Deposited:	10 Dec 2012 07:57
Last Modified:	10 Dec 2012 07:57
URI:	http://npl.csircentral.net/id/eprint/891

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