▎ 摘　　要

NOVELTY - Method comprises (i) using dimethylformamide as solvent, preparing polyvinylidene fluoride solution, dividing the obtained solution into A, B, C three parts, (ii) ball milling nanometre ferroferric oxide, ball and ethanol, hydroxyl cellulose, and drying to obtain the modified ferroferric oxide powder, adding to solution A, ultrasonically dispersing, (iii) dispersing nano graphene oxide into dimethylformamide to obtain graphene dispersion liquid, mixing graphene dispersion liquid and solution B, (iv) mixing nano tin indium oxide, ball and ethanol, and hydroxyl cellulose, ball milling, and drying to obtain modified nano tin-doped indium oxide powder, and adding to the solution C, (v) spinning, drying to obtain the fiber layer, (vi) spinning, drying to obtain the fiber layer, (vii) taking the fiber layer obtained in step (vi) as the base layer, spinning, drying to obtain the fiber layer, adding the pigment to the aqueous polyurethane, stirring, dispersing, spraying, and drying. USE - The method is useful for preparing multifunctional stealth material. ADVANTAGE - The material: has stealth function to electromagnetic wave, far infrared and visible light, exhibits a good stealth effect. DETAILED DESCRIPTION - Preparing multifunctional stealth material comprises (i) using dimethylformamide as solvent, preparing polyvinylidene fluoride solution with concentration of 15-20 wt.%, dividing the obtained solution into A, B, C three parts, where the solution C is additionally added with 30 wt.% thermoplastic polyurethane, (ii) taking the nanometre ferroferric oxide, ball and ethanol, hydroxyl cellulose in a mass ratio of 3-4:1:1:0.05, ball milling, taking out and drying to obtain the modified ferroferric oxide powder, and adding to the solution A, ultrasonically dispersing for 30-60 minutes, where the added amount of the modified ferroferric oxide is 5-10 wt.%, (iii) dispersing the nano graphene oxide into dimethylformamide to obtain 2-5 wt.% graphene dispersion liquid, mixing the graphene dispersion liquid and solution B in a volume ratio of 1:1, ultrasonically dispersing for 30-60 minutes, (iv) mixing nano tin indium oxide, ball and ethanol, and hydroxyl cellulose in a mass ratio of 3-4:1:1:0.05, ball milling, taking out and drying to obtain modified nano tin-doped indium oxide powder, and adding to the solution C, ultrasonically dispersing for 30-60 minutes, where the added amount of the modified nano tin indium oxide powder is 5-10 wt.%, (v) spinning the solution C by the electrostatic spinning process, drying to obtain the fiber layer with the surface density of 40-60 g/m2, (vi) taking the fiber layer obtained in step (v) as the base layer, spinning the solution A through the electrostatic spinning process, drying to obtain the fiber layer with the surface density of 20-50 g/m2, namely the first electromagnetic wave stealth layer, (vii) taking the fiber layer obtained in step (vi) as the base layer, spinning the solution B by the electrostatic spinning technique, drying to obtain the fiber layer with the surface density of 20-50 g/m2, namely the second electromagnetic wave stealth layer, adding the pigment to the aqueous polyurethane, stirring, dispersing uniformly, spraying on the second electromagnetic wave stealth layer, drying to obtain the visible light stealth layer. An INDEPENDENT CLAIM is also included for multifunctional stealth material, prepared by above method.