首页|Preparation and excellent electromagnetic absorption properties of dendritic structured Fe3O4@PANI composites
Preparation and excellent electromagnetic absorption properties of dendritic structured Fe3O4@PANI composites
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NSTL
Elsevier
Fe3O4, as a typical absorber, its electromagnetic wave (EMW) absorption properties are far from meeting the requirements of practical application due to its poor impedance matching. In this study, three kinds of novel heterogeneous structured composites, dendritic Fe3O4@(HCl doped PANI), Fe3O4@(p-TSA doped PANI) and Fe3O4@(dedoped PANI), were prepared via hydrothermal method combined with thermal reduction and in-situ polymerization, and their phase composition, microscopic morphologies, static magnetic properties, EMW absorption performance and absorption mechanisms were investigated. The results showed that the introduction of different medium doped and dedoped PANI greatly enhanced the EMW absorption performance of Fe3O4. The outstanding advantages of Fe3O4@(HCl doped PANI) were that the widest effective absorption bandwidth (EAB) up to 6.08 GHz in a relatively thin thickness of 2.1 mm. And the Fe3O4@(dedoped PANI) composite achieved strong absorption ability (? 53.08 dB@3.04 GHz) at low frequency in a relatively thin thickness (4.9 mm). The remarkable improvement of EMW absorption performance of dendritic Fe3O4@PANI composites could be attributed to the introduction of dissipation mechanisms, the optimization of impedance matching characteristics and the formation of appropriate conductive network microstructure. The dendritic Fe3O4@PANI composites are promising EMW absorption materials and have great practical application value.
Dendritic Fe3O4Doped and dedoped PANIFe3O4@PANI compositesElectromagnetic wave absorption
Luo X.、Li H.、Deng D.、Zheng L.、Wu Y.、Luo W.、Zhang M.、Gong R.
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Engineering Research Center of Nano-Geomaterials of Ministry of Education Faculty of Materials Science and Chemistry China University of Geosciences
The State Key Laboratory of Refractories and Metallurgy (Wuhan University of Science and Technology)
School of Optical and Electronic Information Huazhong University of Science and Technology
NSTL
Elsevier
