▎ 摘　　要

NOVELTY - Graphene heating ink comprises 5-15 wt.% carbon black, 10-25 wt.% graphite, 0.1-5 wt.% graphene powder, 0.1-8 wt.% carbon nanotubes powder, 25-40 wt.% adhesive, 1-5 wt.% additives and mixed solvent (balance amount). USE - The graphene heating ink is useful in preparing heating sheet (claimed). ADVANTAGE - The graphene heating ink: has excellent adhesion during printing and improved electrothermal conversion efficiency, far-infrared normal emissivity of the electrothermal film; service life of electrothermal film, simple implementation process. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing graphene heating ink, comprising (i) adding solvent A, dispersant, co-solvent and cross-linking agent into reaction vessel, and stirring for 30 minutes to obtain mixed solvent, (ii) taking the resin, adding the solvent B, stirring for 10 minutes using the reaction kettle, stirring the mixture, pouring the plasticizer, stirring at a speed of 1500 revolutions/minute for 1 hour, and then stirring at a speed of 1000 revolutions/minute for 1 hour, and (iii) taking carbon black, graphite, graphene powder, carbon nanotube powder, mixed solvent, adhesive and additives, and mixing adhesive and the mixed solvent and stirring in the reaction vessel for 30 minutes for preliminary mixing, then adding additive and stirring for 15 minutes, adding graphite stirring for 30 minutes, further dividing carbon nanotube powder into three times, stirring for 20 minutes each time, adding graphene powder into three times, each stirring for 30 minutes, stirring carbon black for 100 minutes to obtain primary heating ink, and placing primary heating ink on a three-roller for 4-6 grindings until the ink fineness is less than 5 mu m; and (2) preparing heating sheet, comprising printing the graphene heating ink on the insulating substrate by a predetermined pattern and baking at 120-150 degrees C, where the insulating substrate is a polyethylene terephthalate sheet, a glass sheet, a silica sheet or a mica sheet.