Research Progress of Polymer-based Lightweight Composites for Microwave Absorptions
The large-scale use of modern information weapons and equipment constitutes a complex electromagnetic environment with numerous numbers,dense overlapping and dynamic interleaving.The high-performance microwave absorbing material is an important means to prevent electromagnetic interferences.Polymer-based microwave absorption composites have attracted widespread attentions due to their advantages such as lightweight,corrosion resistance,adjustable mechanical and electrical properties,etc.Firstly,this article introduced the absorption mechanisms of electromagnetic waves,including the influences of impedance matching and attenuation constant on the absorption performance.Then,the structural designs,preparation methods as well as absorption efficiencies of polymer-based lightweight absorbing composites were discussed.The preparation methods and absorption effects of typical intrinsic conductive polymers were discussed,with a focus on composites represented by polypyrrole(PPy),polyaniline(PANI),and polythiophene(PTh).For non-conductive polymers,the preparation methods and absorbing properties of surface conductive absorbing composites and filled absorbing composites were discussed.Finally,the design strategies of polymer-based absorbing composites were summarized,the application prospects and development directions of polymer-based lightweight microwave absorption composites were prospected.
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