| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1528688 | Materials Science and Engineering: B | 2014 | 7 Pages |
Abstract
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 <-10Â dB in the 27.3-39.5Â GHz range at thickness of 1.1Â mm, and the minimum reflection loss of â15.28Â dB was observed at 29.47Â GHz with a matching thickness of 1.2Â mm. A possible mechanism of the improved microwave absorption properties of the core-shell structure was obtained.
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Authors
Jihai Tang, Li Ma, Nan Tian, Mengyu Gan, Fenfang Xu, Jun Zeng, Ying Tu,