▎ 摘　　要

NOVELTY - Ultraviolet resistant graphene composite para-aramid fiber comprises 85-115 pts. wt. para-aramid fiber, 21-32 pts. wt. graphene, 15-22 pts. wt. ethylene glycol stearate, 12-18 pts. wt. p-nitrophenyl hydrazine, and 10-18 pts. wt. dibutyltin disilicate. USE - Ultraviolet resistant graphene composite para-aramid fiber used for preparing an anti-ultraviolet light material and used in aerospace industry, national defense, automobile industry, bulletproof clothing, communication cable and sports car (claimed). ADVANTAGE - The ultraviolet resistant graphene composite para-aramid fiber has good ultraviolet aging resistance and spinnability, and the initial tensile strength retention rate of the material reach 60% or more after 200 hours of ultraviolet radiation in a 400 Watt ultraviolet aging chamber. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing UV-resistant graphene composite para-aramid fiber, which involves: (A) immersing graphene in a hydrochloric acid solution having a mass concentration of 0.5-0.7% for 10-25 minutes, taking out and draining, then calcining at a high temperature for 3-5 hours, pulverizing and passing through a 250-400 mesh sieve to obtain graphene powder; (B) placing graphene powder in an ethanol solution having a mass concentration of 65-80%, and ultrasonically shaking for 5-10 minutes to obtain a mixed slurry; (C) adding p-nitrophenylhydrazine to the mixed slurry under stirring, and stirring for 15-25 minutes, drying at 85-90 degrees C to obtain modified graphene; (D) mixing ethylene glycol stearate with dibutyltin disilicate, adding 30-50 pts. wt. concentrated sulfuric acid solution with a concentration of 98%, heating to 38-46 degrees C and stirring for 1-3 hours to obtain mixture A; (E) mixing modified graphene with the para-aramid fiber, adding 80-95 pts. wt. water and 150-180 pts. wt. methanesulfonic acid, and stirring uniformly to obtain a mixed solution, heating to 75-80 degrees C, stirring reaction 30-45 minutes to obtain a mixture B; (F) adding mixture A dropwise to the mixture B, while stirring, the dropping rate is 20-50 drops / minute to obtain a mixture C; (G) mixing mixture C with 100-200 pts. wt. ethanol, ultrasonically shaking for 10-20 minutes; (H) removing ethanol layer, filtering residue with water and drying at 60-78 degrees C to obtain a mixture D; (I) dissolving mixture D in 100-200 pts. wt. a concentrated sulfuric acid solution having a 98% mass concentration and stirring uniformly; and (J) placing obtained product in a spinning machine at a temperature of 90-95 degrees C, passing through a coagulation bath, water washing, heat treatment and winding to obtain UV-resistant graphene composite para-aramid fiber.