Constructing and optimizing hollow ZnxFe3-xO4@polyaniline composites as high-performance microwave absorbers

Qiong Shang, Huixia Feng, Jianpu Liu, Qing Lian, Zeyu Feng, Nali Chen, Jianhui Qiu, Hongjing Wu

科研成果: 期刊稿件文章同行评审

34 引用 (Scopus)

摘要

In this study, a series of hollow ZnxFe3-xO4@polyaniline composites (ZFO@PANI) were synthesized by a facile solvothermal process and followed by in-situ chemical oxidation polymerization method, and then evaluated as microwave absorption (MA) absorbers. The effect of ZFO content on the electrical conductivity, electromagnetic parameters and MA performance of the ZFO@PANI composites was also elaborately investigated. As anticipated, the optimized composites of S2 exhibits the minimum reflection loss (RLmin) of −59.44 dB at 11.04 GHz with a matching thickness of 2.31 mm, and the broadest effective absorption bandwidth (EAB, RL < −10 dB, >90% absorption) of up to 4.65 GHz (13.35–18.0 GHz) at 1.72 mm. Noticeably, by adjusting the thickness from 1.5 to 5.0 mm, it can be observed that its RLmin values are all much lower than −10 dB and the qualified EAB can cover the entire C, X and Ku bands. The enhanced MA performance of S2 is mainly due to the efficient synergistic effect between dielectric loss (PANI) and magnetic loss (ZFO nanosphere), and thus achieving the relative balance of impedance matching (appropriate ZFO content) and attenuation capability. Therefore, it has great prospect to be explored as attractive candidate in practical application.

源语言英语
页(从-至)80-91
页数12
期刊Journal of Colloid and Interface Science
584
DOI
出版状态已出版 - 15 2月 2021

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