▎ 摘　　要

NOVELTY - Graphene heating ink comprises e.g. resin matrix, conductive filler, auxiliary agent and solvent, the conductive filler comprises graphene, the resin matrix is made of organic polymer and polysilazane according to mass ratio 1:0.08-1.5, the graphene heating ink further comprises a crosslinking agent; where the auxiliary agent comprises silicon-containing dispersant, and thickener, the graphene heating ink comprises 3-20 wt.% graphene, 3-10 wt.% organic polymer, 0.95-3.1 wt.% polysilazane, 1-2.5 wt.% crosslinking agent, 0.1-0.6 wt.% silicon-containing dispersant, 0.1-0.6 wt.% thickener, and 63-90 wt.% solvent; the weight-average molecular weight of the polysilazane is 600-1300, and the organic polymer is a polyurethane resin and/or an acrylic resin. The crosslinking agent is crosslinking agents containing amine groups including modified polycarbodiimide crosslinking agent, diethylenetriamine, triethylenetetramine, dimethylaminopropylamine and/or diethylaminopropylamine. USE - The graphene heating ink is useful for applying on electric heating film. ADVANTAGE - The graphene heating ink can effectively reduce the consumption of coal resources, further protect the environment safety, satisfies the heating requirement of people, continuously improve the electric heating of the construction technology and has improved electric heating material. The electric heating film can rapidly heat up the space is that all its electrical energy input is effectively converted into more than 60% of far-infrared radiation energy and more than 30% of convective heat energy. DETAILED DESCRIPTION - Graphene heating ink comprises resin matrix, conductive filler, auxiliary agent and solvent, the conductive filler comprises graphene, the resin matrix is made of organic polymer and polysilazane according to mass ratio 1:0.08-1.5 composition, the graphene heating ink further comprises a crosslinking agent; where the auxiliary agent comprises silicon-containing dispersant, and thickener, the graphene heating ink comprises 3-20 wt.% graphene, 3-10 wt.% organic polymer, 0.95-3.1 wt.% polysilazane, 1-2.5 wt.% crosslinking agent, 0.1-0.6 wt.% silicon-containing dispersant, 0.1-0.6 wt.% thickener, and 63-90 wt.% solvent; the weight-average molecular weight of the polysilazane is 600-1300, and the organic polymer is a polyurethane resin and/or an acrylic resin. The crosslinking agent is crosslinking agents containing amine groups including modified polycarbodiimide crosslinking agent, diethylenetriamine, triethylenetetramine, dimethylaminopropylamine and/or diethylaminopropylamine. The silicon-containing dispersant comprises polyether-modified silicone oil, silicone resin, silicone rubber and/or silane coupling agent. The thickener is hydrophobic modified cellulose thickener and polyacrylate. INDEPENDENT CLAIMS are also included for: (1) preparing graphene heating ink comprising graphene powder in the form of a powder, a polysilazane solution in the form of a solution, firstly stirring and dispersing the graphene powder and the polysilazane solution, fully mixing, and adding the remaining raw materials under stirring to prepare the graphene heating ink; and (2) an electric heating film, comprising a substrate and an electric heating film layer covering the substrate, where the electric heating film layer is a ceramic polymer film formed by coating the graphene heating ink on the substrate and heating to 140-150 degrees C for crosslinking and curing.