J. Mater. Sci. Technol. ›› 2021, Vol. 68: 61-69.DOI: 10.1016/j.jmst.2020.06.046

• Research Article • Previous Articles     Next Articles

Hierarchical composite of biomass derived magnetic carbon framework and phytic acid doped polyanilne with prominent electromagnetic wave absorption capacity

Tianqi Houa,1, Zirui Jiaa,1, Ailing Fengb, Zehua Zhoua, Xuehua Liua, Hualiang Lvc,*(), Guanglei Wua,*()   

  1. a Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, China
    b Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji, 721016, China
    c William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA

Abstract:

To solve the electromagnetic pollution, herein, a CoFe2O4/C/PANI composite was developed by a green route, which was constructed with spinel of metal oxide, graphitized carbon and conductive polymer composites. Benefiting from the designable interfaces and increased dipoles, the microwave dielectric response capability can be boosted significantly and resulted in the enhanced microwave absorbing performance. As revealed by the reflection loss curve, the minimum reflection loss (RLmin) reached -51.81 dB at 12.4 GHz under a matched thickness of 2.57 mm. At 2.5 mm, the effective absorbing band covered 8.88 GHz, suggesting the desirable wideband feature. In our case, the method of utilization of a novel green way to fabricate multiple-component EM absorber can be a promising candidate for high-performance EM absorber.

Key words: Electromagnetic wave absorption, CoFe2O4/C/PANI, Interface polarization, Effective absorption bandwidth