Stretchable layered thermal camouflage material and preparation method thereof

Abstract

The invention discloses a stretchable layered thermal camouflage material and a preparation method thereof.The layered thermal camouflage material comprises a carbon material electrode layer, an ionic conductive gel layer and an electrochromic functional layer which are sequentially arranged from bottom to top, and the preparation method comprises the steps that a porous thermoplastic polyurethane fiber membrane is prepared through electrostatic spinning; soaking in an aqueous dispersion of carbon black particles and carboxylated carbon nanotubes, drying to obtain a carbon material electrode layer, adding a waterborne polyurethane aqueous solution and an ionic liquid into water, mixing, coating the surface of the electrode layer with the mixture, and drying to obtain an ionic conductive gel layer; and soaking the porous thermoplastic polyurethane fiber membrane in a mixed solution containing conductive macromolecules, drying, attaching to the gel layer, and packaging to obtain the product. The stretchable layered thermal camouflage material is excellent in tensile property, the tensile strain can reach 460%, the thermal camouflage property of the stretchable layered thermal camouflage material still keeps stable after 5000 times of cyclic stretching recovery under the tensile strain of 60%, and the preparation method is low in cost and high in practicability.

Description

technical field [0001] The invention relates to the technical field of electrochemistry and new energy materials, in particular to a stretchable layered thermal camouflage material and a preparation method thereof. Background technique [0002] With the development of infrared surveillance technology, thermal stealth and camouflage have attracted widespread attention. Recently, there has been a resurgence in the search for more effective active thermal camouflage materials and devices, where manipulation to change the emissivity of an object's surface is a good example of thermal camouflage techniques. According to the Stefan-Boltzmann law, a surface with a lower emissivity will have the same emission power as a black background at a lower temperature. Therefore, low-emissivity (low-e) coatings or films can be used to shield the thermal signature of objects that are warmer than the background. This approach is further extended to dynamically adjust the surface emissivity, ...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing technology, especially for the technical problems of the existing thermal camouflage materials such as easy deformation and damage, poor stability of stretching cycles, and inability to stably exert functional integrity after stretching deformation recovery, etc., to provide A kind of stretchable layered thermal camouflage material with excellent tensile properties, can still play a complete function after recovery under certain deformation conditions, and has strong tensile mechanical cycle stability and its preparation method

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