Chemical Journal of Chinese Universities ›› 2019, Vol. 40 ›› Issue (8): 1784-1792.doi: 10.7503/cjcu20190012

• Polymer Chemistry • Previous Articles    

Fabrication and Microwave Absorption Mechanism of PCIP/CoFe2O4/PANI Composites

LI Ze, WANG Jianjiang, GAO Haitao, ZHAO Fang   

  1. Department of Vechicle and Electrical Engineering, Army Engineering University Shijiazhuang Campus, Shijiazhuang 050003, China
  • Received:2019-01-07 Revised:2019-07-23 Online:2019-08-10 Published:2019-08-02
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.51172282).

Abstract: Porous carbonyl iron powder(PCIP) was obtained by pitting etching technique. CoFe2O4 and polyaniline(PANI) were loaded on the surface of porous carbonyl iron by coprecipitation and in-situ polymerization to obtain PCIP/CoFe2O4/PANI composites with electromagnetic absorption properties. The morphology, composition and microwave absorption properties of the composites were studied by scanning electron microscopy(SEM), X-ray diffraction(XRD), Fourier transform infrared(FTIR), thermogravimetric analyzer(TGA) and vector network analyzer(VNA). The results showed that CoFe2O4/PANI agglomerated on the surface of PCIP, which significantly improved the electrical loss ability of the composites, and promoted the interference cancellation of 1/4 wavelength of low frequency electromagnetic wave. When the content of aniline was 0.5 mL, the reflection loss of the composites reaches -22.9 dB at 5.7 GHz, and the absorbing property was greatly improved in low frequency. The internal reasons for the improvement of low frequency absorbing properties of composites were analyzed by using the electromagnetic wave interface reflection model and the 1/4 wavelength interference cancellation theory.

Key words: Porous carbonyl iron, Conductive polymer, Magnetic material, Composite material, Low frequency absorption

CLC Number: