Abstract
Infrared stealth technology allows targets to evade detection by thermal infrared detection and plays an important role in the defense industry and military.However,current research and development of infrared stealth materials focuses only on reducing infrared emissivity or controlling the surface temperature of an object,and few studies combine the two.Therefore,in this paper,vanadium dioxide/polyethylene glycol/polyacrylonitrile(VO2/PEG/PAN)composite nanofibrous films were fabricated using the electrospinning technique with PAN as the matrix,PEG as the temperature-regulated material and VO2 as the infrared emissivity material.The composite nanofibrous films not only possessed excellent thermal stability and mechanical properties but also had good thermal regulation and adjustable infrared emissivity.The latent heat value of the first phase change was 40.42 J g-1 and the latent heat value of the second phase change was 4.27 J g-1 when the content of VO2 was 40wt％;more importantly,the infrared emissivity was 0.16 at 90℃.Therefore,the composite nanofibrous films could help achieve good infrared stealth and thermal camouflage performance for high-temperature targets through effective thermal buffering and infrared emissivity modulation capabilities.With the characteristics of ultra-lightweight,flexibility,foldability,adjustable shape,strong thermal stability,excellent mechanical properties,thermal self-regulation,and adjustable infrared emissivity,the prepared VO2/PEG/PAN composite nanofibrous films present great potential for application in infrared stealth and thermal camouflage of new military equipment.
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