Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 29, Issue 1, Pages 70-79Publisher
SPRINGER
DOI: 10.1007/s10854-017-7889-z
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Funding
- National Natural Science Foundation of China [51672222]
- Spaceflight Innovation Foundation of China
- Spaceflight Foundation of China [2014-HT-XGD]
- Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University [Z2017048]
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In this work, we successfully parepared the quaternary composites of CoNi@SiO2@graphene@PANI via a four-step method. The structures, chemical composition and morphologies of obtained composites are analyzed in detail. The electron microscopy results show spherical CoNi@SiO2 particles evenly dispersed into the surface of graphene@polyaniline nanosheets. The electromagnetic parameters indicate that CoNi@SiO2@graphene@PANI exhibits enhanced electromagnetic absorption properties compared to CoNi@SiO2, which can be mainly attributed to the improved impedance matching and multi-interfacial polarization. The maximum reflection loss of CoNi@SiO2@graphene@PANI can reach - 43 dB at 15.4 GHz and the absorption bandwidth with the reflection loss exceeding - 10 dB is 5.7 GHz (from 12.3 to 18 GHz) with the thickness of 2 mm. Our results demonstrate the quaternary composites composed of CoNi@SiO2 microparticles and rGO-PANI nanocomposites can serve as light weight and high-performance EM absorbing material.
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