▎ 摘　　要

NOVELTY - Preparing PTC graphene-based conductive ink comprises providing graphene oxide acetone dispersion, adding heteropolyacid to graphene oxide acetone dispersion, stirring and mixing, collecting first precipitate by centrifugation and drying and using first precipitate resuspend in acetone and adding titanium acetylacetonate, stirring and mixing again, and resuspending in ethanol to prepare titanium quantum doped graphene dispersion liquid, adding granular plastic index (PI) and powdered polylactic acid resin and mixing powder polylactic acid resin and granular PI, melt blending, transferring mixed solution to reaction kettle, reacting and then cooling naturally, stirring the polylactic acid-titanium quantum dot doped graphene-based mixture, adding structure stabilizer, polyacrylonitrile-maleic anhydride copolymer and leveling agent and stirring. USE - The method is useful for preparing PTC graphene-based conductive ink. DETAILED DESCRIPTION - Preparing PTC graphene-based conductive ink comprises providing graphene oxide acetone dispersion, adding heteropolyacid to graphene oxide acetone dispersion, stirring and mixing, collecting first precipitate by centrifugation and drying and using first precipitate resuspend in acetone and adding titanium acetylacetonate, stirring and mixing again, collecting second precipitate by centrifugation and drying, placing second precipitate in a hydrogen environment for reduction to prepare titanium quantum dot doped graphene and resuspending in ethanol to prepare titanium quantum doped graphene dispersion liquid, taking 50-250 pts. wt. first dispersant and stirring, adding 15-40 pts. wt. titanium quantum dot-doped graphene dispersion and 5-25 pts. wt. conductive carbon black to obtain titanium quantum dot-doped graphene-carbon black paste, adding 1-5 pts. wt. granular PI and 15-35 pts. wt. powdered polylactic acid resin and mixing powder polylactic acid resin and granular PI, melt blending, granulating and grinding into micron or nano-sized granular PI modified polylactic acid mixture, and adding granular PI modified polylactic acid mixture to 50-250 pts. wt. two dispersants and stirring to prepare PI modified polylactic acid mixture, adding PI modified polylactic acid mixed liquid and 500-2500 pts. wt. third dispersant slowly and stirring dropwise into the stirred titanium quantum dot-doped graphene-carbon black slurry after the addition is complete, transferring mixed solution to reaction kettle at 85-95 degrees C, reacting for 0.5-2 hours and then cooling naturally, continue to stir during the reaction, to prepare a polylactic acid-titanium quantum dot doped graphene-based mixed solution, stirring the polylactic acid-titanium quantum dot doped graphene-based mixture, adding 0.5-2.5 pts. wt. structure stabilizer, 0.5-2.5 pts. wt. polyacrylonitrile-maleic anhydride copolymer and 2-8 pts. wt. leveling agent, stirring at 500-5000 revolutions per minute for 0.5-6 hours to prepare PTC graphene-based conductive ink, where the heteropoly acid includes phosphomolybdic acid, silimolybdic acid, phosphotungstic acid and silicotungstic acid. An INDEPENDENT CLAIM is also included for PTC graphene-based conductive ink.