Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 746, Issue -, Pages 496-502Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.02.324
Keywords
Polyaniline; Ferrite; Interfacial polymerization; Nanocomposite; Microwave absorption property
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Funding
- National Natural Science Foundation of China [51672129, 51702158, 11502110]
- Fundamental Research Funds for the Central Universities [NS2017036]
- Natural Science Foundation of Jiangsu Province of China [BK20150737]
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Coralliform polyaniline (PANI) nanorods were successfully grafted onto the surface of Li0.35Zn0.3Fe2.35O4 (LZFO) particles by interfacial polymerization. The LZFO particles were prepared by sol-gel method and decorated via the coralliform PANI nanorods. The structure and morphology were systematically investigated by Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), and scanning and transmission electron microscopy (SEM/TEM). The LZFO/PANI nanocomposite with novel coralliform microtopography was prepared by using an efficient, simple, and controllable two-step method. The electromagnetic parameters with different weight ratios of ferrite and aniline monomer were investigated at the 0.5-18 GHz frequency range by using vector network analyzers. Reflection loss (R-L) of different thicknesses was calculated using the electromagnetic parameter according to the transmission line theory. The LZFO/PANI nanocomposite, optimized with a weight ratio of 1: 2 of ferrite to aniline monomer, showed that the maximum R-L value reached -36.9 dB at 12.4 GHz with the thickness of 2.1 mm, and the bandwidth below -10 dB was at 4.24 GHz (11.26-15.5 GHz). The enhanced microwave absorption properties of LZFO/PANI nanocomposites were chiefly attributable to the coralliform structure and improved impedance matching between the dielectric and magnetic loss. This study proves that LZFO/PANI nanocomposites can be a potential candidate for efficient microwave absorption materials. (C) 2018 Elsevier B.V. All rights reserved.
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