▎ 摘　　要

NOVELTY - A composite material comprises banana stalk, polylactic acid, sodium tripolyphosphate, graphene, fatty alcohol polyoxyethylene ether ammonium sulfate, complexing agent (A), and complexing agent (B). The component (A) contains e.g. ACR foam regulator, aerosol generating agent, KH-550 (RTM: 3-aminopropyltriethoxysilane), fatty acid glyceride, modified polyacrylate, di(2-ethylhexyl)phthalate, and polyaluminum chloride. The component (B) contains e.g. tapioca starch, dimethyl phosphite, N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide, and epibromohydrin. USE - Composite material used in three-dimensional printing application (claimed). ADVANTAGE - The composite material is environmentally-friendly, and has excellent tensile strength, and elongation at break. DETAILED DESCRIPTION - A composite material comprises 200 pts. wt. banana stalk, 71 pts. wt. polylactic acid, 50 pts. wt. sodium tripolyphosphate, 2 pts. wt. graphene, 0.6 pt. wt. fatty alcohol polyoxyethylene ether ammonium sulfate, 8 pts. wt. complexing agent (A), and 5 pts. wt. complexing agent (B). The component (A) is obtained by mixing 6 pts. wt. aerosol generating agent, 5 pts. wt. KH-550 (RTM: 3-aminopropyltriethoxysilane), 4 pts. wt. fatty acid glyceride, 6 pts. wt. modified polyacrylate, and 5 pts. wt. pentaerythritol tetrakis(3,5-di-tert- butyl-4-hydroxyhydrocinnamate) (antioxidant 1010), heating to 130 degrees C, reacting for 65 minutes to obtain material (a1), adding 10 pts. wt. ACR foam regulator and 6 pts. wt. polyaluminum chloride to the material (A), reacting at 160 degrees C for 142 minutes, adding 4 pts. wt. di(2-ethylhexyl)phthalate to the product, cooling the mixture to 122 degrees C and reacting for 60 minutes. The component (B) is obtained by mixing 182 pts. wt. tapioca starch, 22 pts. wt. dimethyl phosphite, 10 pts. wt. N-ethyl-5-methyl-2-(1-methylethyl)cyclohexanecarboxamide, 3 pts. wt. potassium hydroxide, 0.9 pt. wt. titanium-aluminum composite coupling agent, and 0.5 pt. wt. vanadium pentoxide, reacting at 59 degrees C for 3.8 hours material (b1), adding 10 pts. wt. epibromohydrin, 4.2 pts. wt. carbamide, 0.3 pt. wt. azobisisobutyrate (ethylene glycol dimethacrylate), 1.2 pt. wt. dibutyl phthalate, 1 pt. wt. methyl methacrylate-butadiene-styrene terpolymer, 0.8 pt. wt. modified rosin resin, 0.7 pt. wt. boric acid, and 0.4 pt. wt. ammonium dihydrogen phosphate to the material (b1), reacting at 60 degrees C for 1.3 hours, adding 0.6 pt. wt. stearic acid to the product, adjusting pH to 8.8, heating to 77 degrees C, gelatinizing at 30 degrees C for 50 minutes, adding 0.7 pt. wt. polydimethylsiloxane, and stirring for 9 minutes. Also claimed is manufacture of composite material, which involves pulverizing banana straw, sieving with 300-mesh, drying the powder at 105 degrees C for 2.2 hours until water content is 0.7% to obtain banana stalk powder, ultrasonically processing graphene at intensity of 6800 GS, ultrasonic power of 600 W and 55 degrees C for 16 minutes to obtain activated graphene, adding fatty alcohol polyoxyethylene ether ammonium sulfate to the activated graphene, stirring at 76 degrees C for 0.8 hours to obtain activated graphene powder, adding activated graphene powder, polylactic acid, sodium tripolyphosphate, complexing agent (A) to the banana stalk powder, heating to 224 degrees C, stirring for 2.5 hours, cooling to room temperature to obtain banana stalk three-dimensional printing primary material, pulverizing the primary material at -115 degrees C, adding the component (B), uniformly mixing, and extruding at 205 degrees C.