▎ 摘　　要

NOVELTY - An aqueous graphene conductive ink comprises 20-55 pts. wt. graphene slurry, 5-40 pts. wt. conductive carbon black, 5-15 pts. wt. acid-base regulator, 0.2-1.8 pts. wt. anti-settling agent, 10-40 pts. wt. solvent, 20-45 pts. wt. connecting material, 0.01-2 pts. wt. surfactant, 0.1-2.9 pts. wt. defoamer, 0.05-0.5 pt. wt. leveling agent and 0.1-2 pts. wt. adhesion promoter. The acid-base regulator is ammonia and/or monoethanolamine. The connecting material is an aqueous thermosetting acrylic resin AC5165, aqueous acrylic resin AC5110 and/or thermoplastic acrylic resin AC5000. USE - The aqueous graphene conductive ink is useful in a radio-frequency identification label (claimed). ADVANTAGE - The aqueous graphene conductive ink has excellent adhesive force and low square resistance. DETAILED DESCRIPTION - An aqueous graphene conductive ink comprises 20-55 pts. wt. graphene slurry, 5-40 pts. wt. conductive carbon black, 5-15 pts. wt. acid-base regulator, 0.2-1.8 pts. wt. anti-settling agent, 10-40 pts. wt. solvent, 20-45 pts. wt. connecting material, 0.01-2 pts. wt. surfactant, 0.1-2.9 pts. wt. defoamer, 0.05-0.5 pt. wt. leveling agent and 0.1-2 pts. wt. adhesion promoter. The acid-base regulator is ammonia and/or monoethanolamine. The connecting material is an aqueous thermosetting acrylic resin AC5165, aqueous acrylic resin AC5110 and/or thermoplastic acrylic resin AC5000. The defoamer is an aqueous alkyl modified silicone defoamer, silicone defoamer, high-molecular weight acrylate homopolymer non-silicon defoamer and/or low-molecular weight acrylate homopolymer non-silicon defoamer. The leveling agent is a solvent leveling agent, an acrylic leveling agent, a silicone leveling agent and/or fluorocarbon type leveling agent. The adhesion promoter is a silane coupling agent adhesion promoter, a titanate coupling agent adhesion promoter and/or a resin adhesion promoter. The anti-settling agent is chosen from modified hydrogenated castor oil, modified polyurea N-methylpyrrolidone solution and/or polyamide wax series. INDEPENDENT CLAIMS are included for the following: (1) a method for preparing the aqueous graphene conductive ink, which involves (1) adding graphene slurry to a homogenizer, circularly homogenizing for 3 times to obtain a solution (A), where the fineness of homogeneous graphene slurry is less than 20 mu m, (2) adding the solution (A) to a nano sand mill, setting the parameters of the grinding machine to 1400 rpm, setting the pressure to 3 MPa, adding connecting material to nano-sand mill in the grinding process, and grinding for 30 minutes to obtain a solution (B), (3) adding acid-base regulator, conductive carbon black, defoamer, leveling agent, adhesion promoter, surfactant and deionized water to the solution (B), and grinding until the fineness of the conductive ink is less than or equal to 5 mu m to obtain a slurry (C), and (4) taking out the solution (B) from a dispersing machine stirring tank, adding the solution (B) to a grinding machine, adding aqueous ammonia and deionized water to the slurry (C) to adjust the rotary viscosity to 2000 mPa.second and the pH-value to 7.5 to obtain the product; and (2) a radio-frequency identification label, which comprises a substrate, and the aqueous graphene conductive ink, which is printed on the surface of the substrate.