▎ 摘　　要

NOVELTY - Graphene three-dimensional printing material comprises 5.3-7.8 pts. wt. graphene, 26-30 pts. wt. waste plastics, 34-42 pts. wt. polylactic acid, 13-24 pts. wt. sodium tetraphosphate, 20-25 pts. wt. diethylene glycol butyl ether acetate, 10-19 pts. wt. specific synthetic agent and 5-9 pts. wt. starch synthetic agent, where e.g. specific synthetic agent composed of adjusting agent, generating agent, coupling agent A, compatibilizer, plasticizer, antioxidant, terminating agent and stabilizer; starch synthetic agent composed of starch, urea, gelatin, coupling agent b, initiator and catalyst. USE - Used as graphene three-dimensional printing material. ADVANTAGE - The material has high cantilever notched impact strength (claimed); has high tensile strength, bending strength and notched impact strength, high heat distortion temperature and high melt index, high quality, high impact and high strength. DETAILED DESCRIPTION - Graphene three-dimensional printing material comprises 5.3-7.8 pts. wt. graphene, 26-30 pts. wt. waste plastics, 34-42 pts. wt. polylactic acid, 13-24 pts. wt. sodium tetraphosphate, 20-25 pts. wt. diethylene glycol butyl ether acetate, 10-19 pts. wt. specific synthetic agent and 5-9 pts. wt. starch synthetic agent, where specific synthetic agent composed of 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, 6-10 pts. wt. antioxidant, 5-9 pts. wt. coagulant, 3-5 pts. wt. terminating agent and 2-4 pts. wt. stabilizer; starch synthetic agent composed of 80-130 pts. wt. starch, 10-16 pts. wt. dimethyl glutarate, 8-13 pts. wt. N,N-dimethylacetamide, 2-5 pts. wt. epichlorohydrin, 1.5-3.5 pts. wt. urea, 1-2 pts. wt. gelatin, 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. stabilizer b, 0.3-0.8 pts. wt. defoamer, 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. water-resistant agent and 0.1-0.2 pts. wt. antibacterial agent; coupling agent b is titanate coupling agent; initiator is azobisisobutyric acid(ethyleneglycol)ester; catalyst is platinum catalyst; stabilizer b is organotin stabilizer; defoamer is polyoxyethylene polyoxypropylene pentaerythritol ether; plasticizer b is bis(2-ethylhexyl)phthalate; toughening agent is polypropylene rubber; tackifier is propyltrimethoxysilane; water-resistant agent is boric acid; and antibacterial agent is lithium carbonate; and preparation method of graphene three-dimensional printing material comprises (i) purchasing two-dimensional graphene raw materials in market, performing special treatment to obtain primary graphene powder, (ii) placing hard plastic crusher on the initial disposal of waste plastics, intermittent mixing plastic, breaking waste plastic through cleaning machine to remove surface of dirt, naturally drying and selecting, (iii) placing selected plastic in low-temperature pulverizer of nitrogen or dry ice, crushing at -90 to 110 degrees C under the plastic for 2-3 hours, sieving to obtain 400-600 mesh plastic particles, (iv) adding polylactic acid, sodium tetraphosphate, diethylene glycol butyl ether acetate and specific synthetic agent into primary graphene powder and plastic particles, heating at 180-218 degrees C, stirring at speed of 200-400 revolution/minutes for 2.3-3.9 hours, and then cooling to room temperature to obtain modified graphene three-dimensional printing secondary material; preparation method of specific synthetic agent comprises (a) mixing generating agent, coupling agent A, compatibilizer and antioxidant at 117-128 degrees C, reacting at speed of 100-200 revolution/minutes for 68-82 minutes to obtain material A, (b) adding conditioning agent into material A, mixing and heating coagulant at 143-156 degrees C, reacting at speed of 300-400 revolution/minutes for 145-232 minutes to obtain material B, (c) adding plasticizer A into material B, mixing and cooling stabilizer A to 108-125 degrees C, reacting at speed of 200-300 revolution/minutes for 62-135 minutes, (v) pulverizing modified graphene three-dimensional printing secondary material at -90 to 110 degrees C, adding starch synthetic agent, placing mixed homogeneous mixture in screw extruder, reacting at 180-200 degrees C and rotational speed of 110-130 revolution/minutes and extruding silk, preparation method of starch synthetic agent comprises (a) preparing starch slurry a having concentration 18-25 Be', and pH value of 3.1-3.8, (b) adding dimethyl glutarate, N, N-dimethylacetamide, coupling agent b, catalyst at a concentration of 4-8% into starch slurry a and then reacting at 42-58 degrees C, stirring at speed of 70-100 revolution/minutes under the cross-linking grafting reaction for 2.5-3.5 hours to obtain slurry b, (c) adding gelatin into slurry b, adjusting pH value of 9.1-9.8, adding epichlorohydrin, urea, initiator, plasticizer b, toughening agent, tackifier, water-resistant agent and antibacterial agent, and then stirring at 55-61 degrees C at speed of 80-120 revolutions/minute, crosslinking for 1.2-1.8 hours to obtain slurry c, (d) adding stabilizer b into slurry c, adjusting pH value of 8.3-8.5, heating at 73-77 degrees C, gelatinizing for 50-55 minutes, cooling to 30-33 degrees C, adding defoamer, stirring at a speed of 90-130 revolutions/minute for 8-12 minutes to obtain final product.