▎ 摘　　要

NOVELTY - A graphene three-dimensional printing material comprises graphene, waste plastic, polylactic acid, sodium hexahydrophosphate, propylene glycol methyl ether acetate, synthetic agent and starch synthesis agent. The synthetic agent comprises adjusting agent, generating agent, coupling agent (A), compatibilizer, plasticizer (A), antioxidant, coagulant, terminating agent and stabilizer (A). The starch synthesis agent comprises starch, dimethyl glutarate, N,N-dimethylacetamide, epichlorohydrin, urea, gelatin, coupling agent (B), initiator, catalyst, stabilizer (B) and defoamer. USE - Graphene three-dimensional printing material (claimed). ADVANTAGE - The graphene three-dimensional printing material has high melt index and high strength and excellent notch impact strength, tensile strength, bending strength and impact resistance. DETAILED DESCRIPTION - A graphene three-dimensional printing material comprises 5.4-7.7 pts. wt. graphene, 25-31 pts. wt. waste plastic, 35-40 pts. wt. polylactic acid, 12-23 pts. wt. sodium hexahydrophosphate, 18-24 pts. wt. propylene glycol methyl ether acetate, 9-18 pts. wt. synthetic agent and 5-9 pts. wt. starch synthesis agent. The synthetic agent comprises 15-22 pts. wt. adjusting agent, 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 glutarate, 8-13 pts. wt. N,N-dimethylacetamide, 2-5 pts. wt. epichlorohydrin, 0.5-3.5 pts. wt. urea, 1-2 pts. wt. gelatin, 0.2-0.6 pt. wt. coupling agent (B), 0.1-0.2 pt. wt. initiator, 0.1-0.2 pt. wt. catalyst, 0.1-0.3 pt. wt. stabilizer (B), 0.3-0.8 pt. wt. defoamer, 0.4-0.9 pt. wt. plasticizer (B), 0.3-0.7 pt. wt. toughening agent, 0.3-0.6 pt. wt. tackifier, 0.2-0.4 pt. wt. water-resistant agent and 0.1-0.2 pt. wt. antibacterial agent. The coupling agent (B) is titanate coupling agent. The initiator is azobisisobutyric acid(ethylene glycol) ester. The catalyst is platinum catalyst. The stabilizer (B) is organotin 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. The antibacterial agent is lithium carbonate. The production method of graphene three-dimensional printing material involves: (S1) purchasing two-dimensional graphene raw material on market, and preparing primary graphene powder by special treatment; (S2) initially crushing waste plastics using hard plastic crusher, followed by thoroughly cleaning crushed waste plastic using intermittent plastic cleaning machine, removing dirt on the surface, and naturally drying using air to obtain fine plastic; (S3) placing fine plastic prepared in step (S2) in low-temperature pulverizer under nitrogen or dry ice, crushing at -90 degrees C to 110 degrees C for 2-3 hours, and sieving to get 400-600 mesh plastic fine particles; (S4) adding primary graphene powder prepared in step (S1) and plastic fine particles prepared in step (S3) to polylactic acid, sodium hexahydrophosphate, propylene glycol methyl ether acetate and synthetic agent, heating at 186-215 degrees C, melting, stirring at 200-400 rpm for 2.4-3.7 hours, and then cooling to room temperature to prepare modified graphene three-dimensional printing secondary materials, where the preparation method of synthesis agent involves (S41) uniformly mixing generating agent, coupling agent (A), compatibilizer and antioxidant at 100-200 rpm, performing reaction at 117-128 degrees C for 68-82 minutes to prepare material (A), (S42) adding conditioning agent to material (A) prepared in step (S41), mixing coagulant, heating at 143-156 degrees C and stirring at 300-400 rpm for 145-232 minutes to prepare material (B), and (S43) adding plasticizer (A), terminating agent and stabilizer (A) to material (B) obtained in step (S42) under mixing, cooling to 108-125 degrees C, and stirring at 200-300 rpm for 62-135 minutes; and (S5) pulverizing modified graphene three-dimensional printing secondary material prepared in step (S4) at -90 degrees C to 110 degrees C, adding starch synthesis agent under evenly mixing, and placing mixed mixture into screw extruding forming machine at 180-200 degrees C and speed of 110-130 rpm, where the preparation method of starch synthesis agent involves, (S51) preparing 18-25Be' starch slurry (A) having pH of 3.1-3.8, (S52) adding 4-8% dimethyl glutarate, N,N-dimethylacetamide, coupling agent (B) and catalyst to starch slurry (A) prepared in step (S51), then carrying out crosslinking graft reaction at 42-58 degrees C for 2.5-3.5 hours, and stirring at 70-100 rpm to prepare slurry (B), (S53) adding gelatin to slurry (B) prepared in step (S52), adjusting the pH-value to 9.1-9.8, followed by addition of epichlorohydrin, urea, initiator, plasticizer (B), toughening agent, tackifier, water-resistant agent and antibacterial agent, then carrying out crosslinking reaction at 55-61 degrees C for 1.2-1.8 hours, and stirring at 80-120 rpm to obtain slurry (C), and (S54) adding stabilizer (B) to slurry (C) prepared in step (S53), adjusting the pH-value to 8.3-8.5, heating at 73-77 degrees C, performing gelatinization for 50-55 minutes, reducing the temperature to 30-33 degrees C after the end of gelatinization, adding defoamer, and stirring at 90-130 rpm for 8-12 minutes.