Journal
SYNTHETIC METALS
Volume 161, Issue 5-6, Pages 420-425Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2010.12.020
Keywords
Polyaniline composites; Electro-magnetic function; Microwave absorption; Impedance match
Funding
- National Natural Science Foundation of China [10975066]
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The PANI/carbonyl iron powders (CIP)/Fe3O4 composite was synthesized by mechanical mixing PANI/CIP composite with PANI/Fe3O4 composite with mass ratio of 7:3. The electromagnetic (EM) properties of these composites were studied at 0.5-18 GHz. Compared with PANI/CIP and PANI/Fe3O4 composites, the PANI/CIP/Fe3O4 composites show enhanced EM wave absorption at high frequency range, and the maximum reflection loss is -48.3 dB at 9.6 GHz with a thickness of 1.76 mm. There is no obvious chemical interaction happened during mixing, which retains the magnetic properties of PANI/CIP and PANI/Fe3O4 components. While the conducting channels of the PANI coatings and the metal-polymer interfaces are partly destroyed, which reduces the permittivity and improves the impedance match, hence results in good EM wave absorption for PANI/CIP/Fe3O4 composite. (C) 2010 Elsevier B.V. All rights reserved.
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