材料科学技术(英文版)2022，Vol.108Issue(13) ：64-72.

Magnetic NiFe2O4/Polypyrrole nanocomposites with enhanced electromagnetic wave absorption

Jiang Guo Xu Li Zhuoran Chen Jianfeng Zhu Xianmin Mai Renbo Wei Kai Sun Hu Liu Yunxia Chen Nithesh Naik Zhanhu Guo
材料科学技术(英文版)2022，Vol.108Issue(13) ：64-72.
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Magnetic NiFe2O4/Polypyrrole nanocomposites with enhanced electromagnetic wave absorption

Jiang Guo 1Xu Li 1Zhuoran Chen 1Jianfeng Zhu 1Xianmin Mai 2Renbo Wei 3Kai Sun 4Hu Liu 5Yunxia Chen 6Nithesh Naik 7Zhanhu Guo8
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作者信息

  • 1. School of Materials Science and Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials,Shaanxi University of Science&Technology,Xi'an 710021,China
  • 2. School of Urban Planning and Architecture,Southwest Minzu University,Chengdu 610041,China
  • 3. School of Chemical Engineering,Northwest University,Xi'an 710069,China
  • 4. College of Ocean Science and Engineering,Shanghai Maritime University,Shanghai,201306,China
  • 5. Key Laboratory of Materials Processing and Mold(Zhengzhou University),Ministry of Education,National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou,450001,China
  • 6. School of Mechanical Engineering,Shanghai Dianji University,Shanghai,201306,China
  • 7. Department of Mechanical&Manufacturing Engineering,Manipal Institute of Technology,Manipal Academy of Higher Education,Manipal 576104,Karnataka,India
  • 8. Integrated Composites Laboratory(ICL),Department of Chemical&Biomolecular Engineering,University of Tennessee,Knoxville,TN,37996,USA
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Abstract

NiFe2O4/polypyrrole(NiFe2O4/PPy)nanocomposites are prepared by a simple surface-initiated polymer-ization method and demonstrate negative permittivity in the low frequency regions.These nanocompos-ites also exhibit significantly enhanced electromagnetic wave(EMW)absorption property in the high frequency regions.Compared with pure PPy,the enhanced negative permittivity is observed in the NiFe2O4/PPy nanocomposites with a NiFe2O4 loading of 5.0,10.0,20.0 and 40.0 wt％,indicating the for-mation of metal-like electrical conducting network in NiFe2O4/PPy nanocomposites.Moreover,the neg-ative permittivity could be tuned by changing the NiFe2O4 loading.The minimum reflection loss(RL)of-40.8 dB is observed in the 40.0 wt％NiFe2O4/PPy composites with a thickness of only 1.9 mm.The effective absorption bandwidth below-10.0 and-20.0 dB reaches 6.08 and 2.08 GHz,respectively.The enhanced EMW absorption performance benefits from the improved independence matching,EMW at-tenuation capacity,and synergistic effects of conduction loss,dielectric loss(interfacial and dipole polar-izations)and magnetic loss(exchange and natural resonances).This research work provides a guidance for the fabrication of nanocomposites with an excellent EMW absorption.

Key words

NiFe2O4/PPy composites/Negative permittivity/EMW absorption

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基金项目

work is supported by the Research Starting Foundation of Shaanxi University of Science and Technology(Program 2019QNBJ-01)

and the Research Foundation for Thousand Young Talent Plan of Shaanxi province of China()

出版年

2022
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量70
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