Synthesis and Microwave Absorption Performance of Fe3O4@PPy@PANI Composites

Polypyrrole (PPy) was used to modify the surface of Fe3O4 nanoparticles which was prepared by solvothermal method. Polyaniline (PANI) was used to control the electromagnetic component of Fe3O4@PPy composites, and then Fe3O4@PPy@PANI composites with core-shell structure were successfully prepared. Modifying Fe3O4 nanoparticles with PPy made PANI easily coated on the surface of magnetic nano-particles, and the reasons for this phenomenon were discussed in this paper. The results of the electromagnetic performance analysis show that the minimum reflection loss (RLmin) reaches -39.2 dB when the mass ratio of aniline(An) to Fe3O4@ PPy is 1: 4. The bandwidth of reflection loss less than -10 dB is 4.6 GHz when the mass ratio of An to Fe3O4 @ PPy is 1: 2. The proportion of electromagnetic components have a greater impact on the microwave absorbing properties, which are also described in this article.