Synthesis and electromagnetic properties of PANI/PVP/CIP core–shell composites

•PANI/PVP/CIP core–shell composite was prepared, where PVP can hinder aggregation of CIP and PANI/PVP/CIP composites.•Core–shell structure increases absorbent interface, benefiting reflection, scattering and electromagnetic wave absorption.•PANI/PVP/CIP core–shell composites show better electromagne...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2014-08, Vol.186, p.26-32
Main Authors: Tang, Jihai, Ma, Li, Tian, Nan, Gan, Mengyu, Xu, Fenfang, Zeng, Jun, Tu, Ying
Format: Article
Language:English
Subjects:
Core–shell structure
Corrosion resistance
Electromagnetic properties
Impedance match
PANI/PVP/CIP
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Summary:•PANI/PVP/CIP core–shell composite was prepared, where PVP can hinder aggregation of CIP and PANI/PVP/CIP composites.•Core–shell structure increases absorbent interface, benefiting reflection, scattering and electromagnetic wave absorption.•PANI/PVP/CIP core–shell composites show better electromagnetic matching and microwave absorption in a wider frequency range. 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
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2014.02.003