Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 186, Issue -, Pages 26-32Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2014.02.003
Keywords
Core-shell structure; PANI/PVP/CIP; Corrosion resistance; Impedance match; Electromagnetic properties
Funding
- Project of Science Research & Technology Exploitation of Guangxi Province [11107013-8]
- National Natural Science Foundation of China [51062016]
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The polyaniline/polyvinylpyrrolidone/carbonyl iron powder (PANI/PVP/CIP) core shell composites were prepared by in-situ polymerization in the PVP aqueous solution using toluenesulfonic acid (TSA) as dopant and ammonium persulfate (APS) as oxidant. The PANI/PVP/CIP was systematically investigated using scanning electron microscopy (SEM), FT-IR spectroscopy, electrochemical workstation, thermogravimetry analysis (TGA) and vector network analyzer. The results showed that the PANI/PVP can dramatically improve corrosion resistance of CIP. Compared with pure CIP, the PANI/PVP/CIP composites exhibited better impedance match and excellent microwave absorption properties. The reflection loss was found to <-10 dB in the 27.3-39.5 GHz range at thickness of 1.1 mm, and the minimum reflection loss of -15.28 dB was observed at 29.47 GHz with a matching thickness of 1.2 mm. A possible mechanism of the improved microwave absorption properties of the core shell structure was obtained. (C) 2014 Elsevier B.V. All rights reserved.
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