▎ 摘　　要

NOVELTY - Graphene 3D printing material comprises e.g. 5.3-7.9 pts. wt. graphite, 26-31 pts. wt. waste plastic, 34-42 pts. wt. polylactic acid, 16-24 pts. wt. tripolyphosphate, 21-25 pts. wt. ethylene glycol monobutyl ether acetate, 12-19 pts. wt. specific synthetic agent and 6-9 pts. wt. starch synthetic agent. The specific synthetic agent comprises e.g. 15-22 pts. wt. regulator, 12-18 pts. wt. generating agent, 10-15 pts. wt. coupling agent a, 12-16 pts. wt. compatibilizer, 9-12 pts. wt. plasticizer a, 6-10 pts. wt. antioxidant, 5-9 pts. wt. coagulant, and 3-5 pts. wt. terminating agent. USE - Used as graphene 3D printing material. ADVANTAGE - The graphene 3D printing material has high bending strength (claimed). DETAILED DESCRIPTION - Graphene 3D printing material comprises 5.3-7.9 pts. wt. graphite, 26-31 pts. wt. waste plastic, 34-42 pts. wt. polylactic acid, 16-24 pts. wt. tripolyphosphate, 21-25 pts. wt. ethylene glycol monobutyl ether acetate, 12-19 pts. wt. specific synthetic agent, and 6-9 pts. wt. starch synthetic agent, where the specific synthetic agent comprising 15-22 pts. wt. regulator, 12-18 pts. wt. generating agent, 10-15 pts. wt. coupling agent a, 12-16 pts. wt. compatibilizer, 9-12 pts. wt. plasticizer a, 6-10 pts. wt. antioxidant, 5-9 pts. wt. coagulant, 3-5 pts. wt. terminating agent, and 2-4 pts. wt. stabilizer a. The starch synthesis agent comprises 80-130 pts. wt. starch, 10-16 pts. wt. dimethyl glutaric acid, 8-13 pts. wt. N, N-dimethyl acetamide, 2-5 pts. wt. epoxy-chlorobutane, 1.5-3.5 pts. wt. urea, 1-2 pts. wt. gelatinizing agent, 0.2-0.6 pts. wt. coupling agent b, 0.1-0.2 pts. wt. initiator, 0.1-0.2 pts. wt. catalyst, 0.1-0.3 pts. wt. stabilizing agent b, 0.3-0.8 pts. wt. antifoaming agent, 0.4-0.9 pts. wt. plasticizer b, 0.3-0.7 pts. wt. toughening agent, 0.3-0.6 pts. wt. tackifier, 0.2-0.4 pts. wt. waterproof agent, and 0.1-0.2 pts. wt. antibacterial agent. The coupling agent b is a titanate coupling agent; the initiator is azo di-iso butyric acid (ethylene glycol) ester; the catalyst is a platinum catalyst; the stabilizer b is organic tin stabilizer; the defoamer is polyoxyethylene polyoxypropylene pentaerythritol ether; the plasticizer b is bis (2-ethylhexyl) phthalate; the toughening agent is polypropylene rubber; the tackifier is propyltrimethoxysilane; the water-resistant agent is boric acid; and the antibacterial agent is lithium carbonate. The preparation of graphene 3D printing material comprising (i) using two-dimensional graphene materials, primary graphene powder prepared through the process, (ii) using hard plastic crusher for primarily crushing the waste plastic, waste plastic then using intermittent stirring crushing of plastic cleaning machine to clean thoroughly, removing dirt on the surface, naturally drying, and then selecting plastic; (iii) placing the resulting selected plastic under nitrogen or dry ice low temperature in crusher, crushing the plastic under the temperature of -90 degrees C to -110 degrees C for 2-3 hours, and sieving to obtain 400-600 meshes of plastic granules; (iv) using the primary grapheme powder obtained in the step (i) and plastic granules obtained in the step (iii), adding polylactic acid, tripolyphosphate, ethylene glycol monobutyl ether acetate, specific synthetic agent, heating to 186-217 degrees C, stirring under the rotating speed of 200-400 rotations/minute (rpm) for 2.4- 3.7 hours, then cooling to room temperature to obtain modified graphene 3D print second-grade material, the preparation of specific synthesis agent, comprising (iv, a) using the generating agent, coupling agent a, compatibilizer, antioxidant are mixing, heating to 117-128 degrees C, at the rotating speed of 100-200 rotations/minute (rpm) and reacting for 68-82 minutes to obtain material A; (iv, b) using the resulting material A, adding regulator, coagulant mixing, heating to 143-156 degrees C, stirring at the rotating speed of 300-400 rotations/minute (rpm) and reacting for 145-232 minutes to obtain material B; (iv, c) using the resulting material B, adding plasticizer a, terminating agent, stabilizing a, mixing, reducing temperature to 108-125 degrees C, reacting for 62-135 minutes at the rotating speed of 200-300 rpm, preparing the special synthetic agent, (v) using the resulting modified graphene 3D printing the secondary material at the temperature of -90 degrees C to -110 degrees C, crushing, adding starch synthesis agent uniformly, placing the uniformly mixed mixture into a screw extruding forming machine, extruding the strip under the temperature of 180-200 degrees C and the rotating speed is at 110-130 rpm to obtain graphene 3D printing material with high bending strength, the preparation of starch synthesis agent comprising (v, a) preparing concentration is 18-25Be, pH is 3.1-3.8 of the starch slurry a, (v, b) using the resulting starch slurry a, adding sodium hydroxide solution whose concentration is 4-8% of dimethyl glutarate, N,N-dimethyl acetamide, coupling agent b, catalyst, and then keeping the temperature of 42-58 degrees C, stirring at the speed of 70-100 rpm, carrying out cross linking and grafting reaction for 2.5-3.5 hours to obtain slurry b, (v, c) adding pasting agent into the resulting slurry, adjusting the pH to 9.1-9.8, then adding epoxy-chlorobutane, urea, initiator, plasticizer b, plasticizer, tackifier, waterproof agent, antibacterial agent, then stirring at the temperature of 55-61 degrees C, then stirring at the speed of 80-120 rpm, subjecting to a crosslinking reaction for 1.2-1.8 hours to obtain slurry c; (v, d) using resulting slurry c, adding stabilizing agent b, adjusting the pH to 8.3-8.5, raising temperature to 73-77 degrees C and pasting for 50-55 minutes, reducing the temperature to 30-33 degrees C, after pasting, adding defoaming agent, stirring at rotating speed of 90-130 rpm for 8-12 minutes to obtain the starch synthesis agent.