▎ 摘　　要

NOVELTY - Titanium quantum dots-doped graphene-based conductive ink comprises 15-40 pts. wt. 5-150 mg/ml graphene dispersion, 40-120 pts. wt. 5-80 mg/ml titanium quantum dot dispersion, 5-25 pts. wt. conductive carbon black, 0.5-2.5 pts. wt. polyacrylonitrile-maleic anhydride copolymer, 0.5-2.5 pts. wt. structural stabilizer, 100-500 pts. wt. dispersant (A), 50-200 pts. wt. dispersant (B), 5-20 pts. wt. release resin and 5-10 pts. wt. leveling agent, where the thickness of the graphene in the graphene dispersant is 1-20 layers, the lateral size of the graphene in the graphene dispersant is 300-1000 nm, the size of the titanium quantum dots in the titanium quantum dot dispersion is less than 20 nm, and the degree of polymerization of the polyacrylonitrile-maleic anhydride copolymer is 50-500. USE - The titanium quantum dots-doped graphene-based conductive ink is used for preparing graphene conductive film (claimed) for printing substrate. ADVANTAGE - The graphene conductive film has flexibility, toughness, hardness, adhesion, high-temperature resistance and long service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the titanium quantum dot doped graphene-based conductive ink, which involves (i) providing graphite powder, using modified Hummers method to prepare graphene oxide, centrifuging and resuspending to prepare a graphene dispersion of 5-150 mg/ml, (ii) providing titanium raw material, using liquid phase stripping method to strip the titanium raw material, centrifuging and resuspending to prepare a titanium quantum dot dispersion of 5-80 mg/ml, (iii) taking 50-250 pts. wt. dispersant (A) and stirring, dripping 15-40 pts. wt. graphene dispersion and conductive carbon black to the first dispersant to obtain graphene-carbon black slurry, (iv) taking dispersant (A) and stirring, dripping titanium quantum dot dispersion and release resin to the dispersant (A) to prepare titanium quantum dot slurry, (v) dripping titanium quantum dot slurry and dispersant (B) to the stirred graphene carbon black slurry, after the dripping is completed, transferring the mixed solution to a high pressure kettle at 70-100 degrees C, reacting for 0.5-2 hours, naturally cooling, and continuously stirring during the reaction to prepare a titanium quantum dot-doped graphene-based mixed solution, and (vi) while stirring the titanium quantum dot-doped graphene-based mixture, adding structure stabilizer, polyacrylonitrile-maleic anhydride copolymer and leveling agent, after the addition is completed, and continuously stirring at 100-5000 rpm for 0.5-6 hours.