▎ 摘　　要

NOVELTY - Manufacture of graphene-nano nickel thermoelectric thin film involves mixing surface-treated graphite oxide and polyvinylpyrrolidone, adding ammonium acetate and ethylene glycol, centrifuging, mixing product with aniline monomer, dodecylbenzene sulfonic acid and ammonium persulfate to obtain an absorbing material, mixing absorbing material with deionized water to form uniform graphene solution, washing a copper substrate with acetone, deionized water and methanol, placing the substrate in a container including the uniform graphene solution and performing electrophoresis. USE - Manufacture of graphene-nano nickel thermoelectric thin film (claimed). ADVANTAGE - The method enables efficient manufacture of graphene-nano nickel thermoelectric thin film with excellent conductivity. DETAILED DESCRIPTION - Manufacture of graphene-nano nickel thermoelectric thin film involves pulverizing graphite to a size of 50-200 mesh, adding he graphite powder to 35 %mass hydrochloric acid solution, stirring for 30 minutes, washing with deionized water until pH is neutral, drying, mixing the dried graphite powder, potassium persulfate and phosphorus pentoxide, adding the mixture to concentrated sulfuric acid, adjusting pH to 1.5, stirring at 60 degrees C for 1-2 hours, heating at 80 degrees C and 5 degrees C/minute for 2-4 hours and 87 degrees C and 2 degrees C/minute for 1-2 hours, adding distilled water to the reaction mixture, adjusting pH to 3.6, maintaining for 36 hours, filtering the mixture using distilled water such that the pH is 6-7, drying at room temperature, adding the dried mixture to concentrated nitric acid for 45-60 minutes such that the pH is adjusted to 2-4, uniformly stirring, adding potassium permanganate, stirring for 30 minutes, cooling to -12 degrees C, adding potassium permanganate, stirred for 30 minutes, cooling to -15 degrees C, adding potassium permanganate, stirring for 20 minutes, filtering, drying, to obtain preoxidized graphite mixture, heat-treating the pre-oxidized graphite mixture at 1100 degrees C for 10-20 seconds, 1150 degrees C for 15-20 seconds and 1180 degrees C for 20-30 seconds to obtain expanded graphite, heating the expanded graphite in an incubator at 40 degrees C, reacting for 3 hours, adding distilled water, reacting at 40 degrees C for 2.5 hours, adding distilled water and hydrogen peroxide, reacting for 10-60 minutes, centrifuging for 10 minutes, washing with hydrochloric acid solution, dialyzing for 7-8 days to obtain oxidized graphite, dissolving oxidized graphite in dimethylsulfoxide, adding N-hydroxysuccinimide and self-made surface treatment agent, reacting at 35 degrees C for 2 hours, filtering, washing and drying to obtain surface-treated graphite oxide, freezing-drying 1-2 g the surface-treated graphite oxide at -10 degrees C to 30 degrees C, mixing the surface-treated graphite oxide with 1-10 g polyethylene oxide-polypropylene oxide-polyethylene oxide copolymer, 10-30 g polyvinylpyrrolidone, adding 500 ml ethylene glycol to form a homogeneous dispersion, mixing 10-50 g ammonium acetate and 500-1000 mL of ethylene glycol, adding ammonium acetate dispersion to the homogeneous dispersion, mixing, stirring, adjusting pH to 9-11 with aqueous ammonia to form a clear solution, heating 100 ml clear solution at 130 degrees C for 2 hours, 150 degrees C and 2-4 degrees C/minute for 4 hours and 200 degrees C and 3-6 degrees C/minute for 3 hours, cooling to 180 degrees C, heating to 200 degrees C for 2 hours, cooling, centrifuging for 10 minutes, washing with ethanol and deionized water, vacuum-drying at 50-70 degrees C for 24 hours to obtain product (a), mixing 5 g product (a) and 5-10 g aniline monomer in dodecylbenzene sulfonic acid, ultrasonically dispersing for 65 minutes to obtain product (b), mixing 3 g ammonium persulfate, 80-120 ml distilled water and product (b), stirring for 15 hours, filtering, washing with distilled water and ethanol and vacuum-drying at 50-70 degrees C for 24-36 hours to obtain an absorbing material, mixing absorbing material with deionized water, mechanically stirring for 10-15 minutes, ultrasonically dispersing for 30-50 minutes, to form uniform graphene solution, washing a copper substrate with acetone, deionized water and methanol, vacuum-drying at 90-120 degrees C for 10-30 minutes, placing the substrate in a container including the uniform graphene solution as negative electrode, and performing electrophoresis using iron pellets as positive electrode for 30-90 minutes. The mass ratio of the graphite powder, potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid is 1-3:1-2-2:2:5-10. The mass ratio of the dried mixture and concentrated nitric acid is 1-4:0-100. The ratio of the dried mixture with respect to the total content of potassium permanganate is 1-2:10-15.