▎ 摘　　要

NOVELTY - A nanonickel-loaded graphene composite wave-absorbing material is layered composite material comprising nickel nanoparticles having particle size of 20-100 nm, grown on a graphene sheet layer, and polyaniline coated on the surface of the graphene sheet loaded with the nickel nanoparticles. Preparation of composite wave-absorbing material, is also claimed. Mixture containing e.g. surface-treated graphite oxide, and aniline are added to solution of sodium dodecylbenzenesulfonate, ammonium persulfate solution is dripped, filtered, washed and dried, to obtain wave-absorbing material. USE - Nanonickel-loaded graphene composite wave-absorbing material (claimed). ADVANTAGE - The nanonickel-loaded graphene composite material has excellent wave absorbing performance and is prepared by rapid process. DETAILED DESCRIPTION - A nanonickel-loaded graphene composite wave-absorbing material is layered composite material comprising nickel nanoparticles having particle size of 20-100 nm, grown on a graphene sheet layer, and polyaniline coated on the surface of the graphene sheet loaded with the nickel nanoparticles. Preparation of nanonickel-loaded graphene composite wave-absorbing material, is also claimed. Graphite powder, potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid in a molar ratio of 1-3:1-2:1-2:5-10 are mixed, pH is adjusted to 1.5, then stirred at 60 degrees C for 1-2 hours, heated at 80 degrees C for 2-4 hours at a rate of 5 degrees C/minute, stirred at 87 degrees C for 1-2 hours at a rate of 2 degrees C/minute, diluted using distilled water, pH is adjusted to 3.6, leave still for 36 hours, filtered and solid is dried at room temperature. Concentrated nitric acid is added, stirred for 45-60 minutes, pH is adjusted to 2-4, potassium permanganate is added at -8 degrees C, stirred for 30 minutes, cooled to -12 degrees C, potassium permanganate is further added, stirred for 30 minutes, cooled to -15 degrees C, potassium permanganate is added and stirred for 20 minutes. Mixture is heated at 40 degrees C for 3 hours in an incubator, distilled water is added, reacted at 40 degrees C for 2.5 hours, distilled water and hydrogen peroxide in a ratio of 4-20:1 are added, mixed for 10-60 minutes, centrifuged for 10 minutes at a rate of 9500 rpm, washed using hydrochloric acid solution, where the volume of hydrochloric acid solution after centrifugation is 10-50 times the volume of the product, and dialyzed for 7-8 days, to obtain graphite oxide. Graphite oxide is purified using 1.72 g/ml concentrated sulfuric acid and hydrogen peroxide in a mass ratio of 1-2:2-5. Purified graphite oxide is dissolved in dimethyl sulfoxide, then N- hydroxysuccinimide and surfactant are added, stirred at 35 degrees C for 2 hours, filtered, washed and dried, to obtain surface-treated graphite oxide. 1-2 g Surface-treated graphite oxide is freeze-dried at -10 degrees C to 30 degrees C, 1-10 g polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and 1 g polymethylmethacrylate-polyacrylamide are added, mixed, mixture is dispersed in 500 ml ethylene glycol, and irradiated with ultraviolet radiation for 36 hours, to obtain uniform dispersion (a). 20-40 ml ethylene glycol solution of nickel chloride with concentration of 0.1 mol/ml, 6-25 g polyvinylpyrrolidone and 10-50 g ammonium acetate are dissolved in 500-1000 ml ethylene glycol, to obtain dispersion (b). Dispersion (a) and dispersion (b) are mixed, and pH is adjusted to 9-11 using ammonia. 100 ml obtained solution is added into reactor, then sealed and heated at 130 degrees C for 2 hours at a rate of 2-4 degrees C/minute, further heated at 150 degrees C for 4 hours at a rate of 3-6 degrees C/minute, heated at 200 degrees C for 3 hours, cooled to 180 degrees C at a rate of 5-7 degrees C/minute, heated at 200 degrees C for 7 hours at a rate of 3-6 degrees C/minute, cooled to room temperature at a rate of 3-6 degrees C/minute, centrifuged for 10 minutes at a rate of 8000-10000 rpm, washed 3 times using ethanol and deionized water, and vacuum-dried at 50-70 degrees C for 24 hours, to obtain dried product (A). 5 g Product (A) and 5-10 g aniline monomer are added to a solution of sodium dodecylbenzenesulfonate and ultrasonically dispersed for 65 minutes, to obtain product (B). Solution of 3 g ammonium persulfate dissolved in 80-120 ml distilled water is dripped into product (B), stirred for 15 hours, filtered, washed using distilled water and ethanol, and vacuum-dried at 50-70 degrees C for 24-36 hours, to obtain nanonickel-loaded graphene composite wave-absorbing material. The ratio of dried substance and concentrated nitric acid is 1-4:50-100. The mass ratio of dried substance and total amount of potassium permanganate is 1-2:10-15. The mass ratio of product (A) and sodium dodecylbenzenesulfonate is 1-1.5:8-15.