▎ 摘　　要

NOVELTY - Preparation of graphene/silver nanowire composite ink involves preparing silver nanowire aqueous solution having concentration of 4-6 %mass, and pre-oxidized graphite, mixing graphite and concentrated sulfuric acid, controlling temperature to -5 degrees C to 5 degrees C to obtain intermediate product, mixing potassium permanganate and intermediate in ratio of (0.07-0.08):1, heating at 30-40 degrees C for 1-3 hours to produce a solution (D), cooling, diluting, adding hydrogen peroxide to prepare a solution (E), removing the supernatant, dispersing precipitate in water, centrifuging, diluting to produce a graphene oxide solution, mixing resulting solution and ascorbic acid in ratio of (0.002-0.003):1, stirring, heating at 90-99 degrees C, cooling, filtering, drying to produce reduced graphene oxide, adding resulting product and mixture (F) containing ethanol, ethylene glycol, glycerol and water, ultrasonically dispersing to produce graphene solution, and mixing the graphene solution and silver nanowire solution. USE - Preparation of graphene/silver nanowire composite ink. DETAILED DESCRIPTION - Preparation of graphene/silver nanowire composite ink involves heating ethylene glycol at 140-160 degrees C, mixing cupric chloride dihydrate and ethylene glycol in mass-volume ratio of (0.007-0.01):1, adding resulting mixture to initially prepared heated ethylene glycol solution in ratio of (0.6-0.7):1 to produce a solution (A), mixing silver nitrate/ethylene glycol solution and polyvinylpyrrolidone/ethylene glycol solution and mixed solution (A) in ratio of (0.05-0.07):1, heating, mixing to produce a mixed solution (B), removing supernatant, dispersing the precipitate in acetone, centrifuging, vacuum-drying the solid product to obtain silver nanowire, dispersing the silver nanowires in deionized water to prepare a silver nanowire aqueous solution having concentration of 4-6 %mass, adding expanded graphite, potassium persulfate and phosphorus pentoxide to concentrated sulfuric acid in ratio of 3:2.5:2.5:40, stirring, heating in an oil bath to 70-90 degrees C for 4-6 hours to obtain a mixed solution (C), cooling to room temperature, diluting, drying to produce pre-oxidized graphite, mixing resulting graphite and concentrated sulfuric acid in ratio of (0.02-0.025):1, controlling temperature to -5 degrees C to 5 degrees C to obtain intermediate product, mixing potassium permanganate and intermediate product in mass-volume ratio of (0.07-0.08):1, heating at 30-40 degrees C for 1-3 hours to produce a solution (D), cooling, diluting, adding hydrogen peroxide, maintaining for 10-15 hours to prepare a mixed solution (E), removing the supernatant, dispersing the precipitate in deionized water, centrifuging, adding hydrochloric acid and deionized water, diluting the remaining precipitate, dialyzing in a dialysis bag to produce a graphene oxide solution, mixing resulting solution and ascorbic acid in ratio of (0.002-0.003):1, stirring, heating at 90-99 degrees C, cooling to room temperature, filtering, drying to produce reduced graphene oxide, adding resulting product and mixture (F) containing ethanol, ethylene glycol, glycerol and deionized water in ratio of 50:45:5:75, ultrasonically dispersing to produce graphene solution, mixing the graphene solution and the silver nanowire aqueous solution to obtain a graphene/silver nanowire composite ink. The ratio of silver nitrate and ethylene glycol is (8-10):1. The ratio of polyvinylpyrrolidone and ethylene glycol is (140-160):1.