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Conductive polymer coating

Author:admin   AddTime:2021-10-11

The research on organic polymer materials with microwave electrical or magnetic loss function has attracted more and more attention from countries all over the world. This is because such materials have strong molecular design, diversified structures, convenient synthesis and processing, easy compounding or mixing, and low density. And its unique physical and chemical properties. France, India, etc. reported the electromagnetic properties of some conductive polymers in the 3cm band. French Laurent Olmedo et al. studied that polypyrrole, polyaniline, and poly-3octylthiophene all absorb more than 8dB in this frequency. The absorbing coating made of Retinyl Shifflass Salts from Carnegie-Mellon University in the United States can reduce the target RCS by 80%, while the density is only 1/10 of that of ferrite. Nitto Denko Corporation of Japan prepared soluble polyaniline conductive polymer. The polypyrrole-treated polyester film developed by a Japanese company has improved conductivity and optical transparency by controlling polymer conditions, such as dopant type, solvent, reaction temperature, etc., and is expected to be developed compared with indium oxide, tin oxide, etc. Transparent conductive polymer.



The combination of conductive polymer and inorganic magnetic loss material may develop a new type of lightweight broadband absorbing coating. According to recent reports, the United States has developed a transparent conductive absorbing coating, which is a mixture of conductive polymer polyaniline and cyanate. The mixture is composed of conductive polymer suspended in polyurethane or other polymer matrix. It can be sprayed directly or combined with composite materials to form a laminated material. It can withstand a high temperature of 510°C for 50 hours. The key to preparing this material is to generate cyanate whiskers. This material is very simple to use, as long as the spray gun with improved nozzles is used, it can be sprayed on any part of the aircraft surface (including the nose, tail, and rivet joints).

There is also a certain foundation for conducting research on the application of conductive polymers to absorbing materials in China. The polyaniline self-supporting film and soluble conductive polymers developed by the Institute of Chemistry of the Chinese Academy of Sciences and the soluble conductive polymers developed by Sichuan Shitai Polymer magnetic materials are likely to be applied to the development of new wave-absorbing coatings.

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