Recent progress of polyaniline-based composites in the field of microwave absorption

Electromagnetic waves pollution as one of the major pollutions, has seriously endangered the human health and the normal use of electronic equipments. The development of high-performance microwave absorption (MA) materials containing wide absorption bandwidth, strong absorption capacity and light weight has become imminent. Due to excellent electrical conductivity, corrosion resistance, and unique doping mechanism, poly -aniline (PANI) is expected to be a highly efficient microwave absorber. However, the lack of magnetic loss and multi-interface polarization of single-component PANI makes it difficult to meet practical applications. There-fore, compounding PANI with other lossy materials is used to improve its MA performance. This paper reviews the research background and the mechanism of PANI-based MA materials. Subsequently, the research progress of PANI/carbon composites, PANI/ferrite composites, PANI/natural composites and multicomponent PANI-based composites is introduced. The challenges and the prospects for the development of PANI-based composites in MA are presented, and the directions and the priorities for future research are pointed out.