▎ 摘　　要

NOVELTY - Preparation of graphene-based conductive ink involves adding heteropoly acid to graphene oxide acetone dispersion, mixing, centrifuging, drying, adding platinum acetylacetonate, mixing, centrifuging, drying, reducing to obtain platinum quantum dot-doped graphene, resuspending in ethanol to obtain platinum quantum dot-doped graphene dispersion, adding with conductive carbon black to dispersant (D1) to obtain platinum quantum dot-doped graphene-carbon black slurry, separately dripping polyimide modified polylactic acid mixture and dispersant (D3) to platinum quantum dot-doped graphene-carbon black slurry, transferring mixed solution to reaction kettle at 85-95 degrees C, reacting, cooling naturally, stirring to obtain polylactic acid-platinum quantum dot-doped graphene-based mixed solution, adding structural stabilizer, polyacrylonitrile-maleic anhydride copolymer and leveling agent to polylactic acid-platinum quantum dot-doped graphene-based mixed solution, and stirring. USE - Preparation of graphene-based conductive ink. ADVANTAGE - The method provides positive temperature coefficient graphene-based conductive ink with improved overall anti-peeling effect. DETAILED DESCRIPTION - Preparation of graphene-based conductive ink involves adding heteropoly acid to graphene oxide acetone dispersion, mixing, centrifuging to obtain precipitate (P1), drying, resuspending in acetone, adding platinum acetylacetonate, mixing at 600-1400 rpm for 2-12 hours, centrifuging at 8000-15000 rpm to obtain precipitate (P2), drying at 60-80 degrees C 30-120 minutes, placing in hydrogen environment, reducing to obtain platinum quantum dot-doped graphene, resuspending in ethanol to obtain platinum quantum dot-doped graphene dispersion, stirring 50-250 pts. wt. dispersant (D1), adding 15-40 pts. wt. platinum quantum dot-doped graphene dispersion and 5-25 pts. wt. conductive carbon black to obtain platinum quantum dot-doped graphene-carbon black slurry, mixing 1-5 pts. wt. granular polyimide and 15-35 pts. wt. powdered polylactic acid resin, melt blending, granulating, grinding into micron or nano-size, adding to 50-250 pts. wt. dispersant (D2), stirring to obtain polyimide modified polylactic acid mixture, separately dripping polyimide modified polylactic acid mixture and 500-2500 pts. wt. dispersant (D3) to platinum quantum dot-doped graphene-carbon black slurry, transferring mixed solution to reaction kettle at 85-95 degrees C, reacting for 0.5-2 hours, cooling naturally, stirring to obtain polylactic acid-platinum quantum dot-doped graphene-based mixed solution, adding 0.5-2.5 pts. wt. structural stabilizer, 0.5-2.5 pts. wt. polyacrylonitrile-maleic anhydride copolymer and 2-8 pts. wt. leveling agent to polylactic acid-platinum quantum dot-doped graphene-based mixed solution, and stirring at 500-5000 rpm for 0.5-6 hours. The heteropoly acid comprises one or more of phosphomolybdic acid, silimolybdic acid, phosphotungstic acid, and silicotungstic acid.