▎ 摘　　要

NOVELTY - Preparing luminous polyamide composite material comprises adding graphene into deionized water, dispersing ultrasonically at 800-1000 kW, centrifuging at 500-800 rotations/minute for 180-200 minutes to obtain graphene dispersion, adding long lasting fluorescent into deionized water, dispersing ultrasonically, centrifuging to obtain long lasting fluorescent dispersion, slowly and drop-wisely adding long lasting fluorescent dispersion into graphene dispersion ultrasonically, filtering, drying carrying out heat treatment under vacuum to obtain graphene/long lasting fluorescent composite material. USE - The material is useful for preparing luminous polyamide composite material (claimed). ADVANTAGE - The material has enhanced dispersibility and uniform luminosity with high luminous intensity and prolonged afterglow time. DETAILED DESCRIPTION - Preparing luminous polyamide composite material comprises: (i) adding 1 g graphene into 100 ml deionized water, dispersing ultrasonically at 800-1000 kW, centrifuging at 500-800 rotations/minute for 180-200 minutes to obtain graphene dispersion, adding 25-100 g long lasting fluorescent into 500 ml deionized water, dispersing ultrasonically at 1000-1200 kW, centrifuging at 800-1000 rotations/minute for 240-300 minutes to obtain long lasting fluorescent dispersion, slowly and drop-wisely adding long lasting fluorescent dispersion into graphene dispersion ultrasonically at 100 kW for 30-60 minutes, filtering, drying, carrying out heat treatment under vacuum at 1050 degrees C for 30 minutes, then at 1250 degrees C for 60 minutes to obtain graphene/long lasting fluorescent composite material; (ii) dispersing 0.5 g graphene/long lasting fluorescent composite material in ethanol by ultrasonic vibration at 300-500 kW and centrifugation at 1000-1200 rotations/minute, then adding water and aqueous ammonia, stirring, adding tetraethylorthosilicate, where the mass ratio of tetraethylorthosilicate and graphene/long lasting fluorescent composite is 1.8:1, adjusting its pH to 9, reacting at 25 degrees C for 12 hours, centrifuging, washing once with acetone and washing three times with deionized water to obtain a precipitate, drying the precipitate at 90 degrees C for 5 hours to obtain silicon dioxide coated core-shell composite, carrying out heat treatment of silicon dioxide coated core-shell composite at 800 degrees C for 1.5 hours under argon atmosphere to obtain complex, immersing the complex in hydrofluoric acid ultrasonically for 5-60 minutes, removing silica portions, centrifuging and drying to obtain graphene/long lasting fluorescent/silicon dioxide composite; and (iii) adding 60-70 pts. nylon resin, 30-40 pts. hybrid reinforced glass fiber, 1-5 pts. nylon masterbatch, 1-5 pts. graphene/red fluorescent/silicon dioxide composite, 1-5 pts. graphene/long lasting fluorescent/silicon dioxide composite and 0.1-0.3 pts. antioxidant into a twin-screw extruder, pelletizing, where the hybrid reinforced glass fiber is added along the side feeder, extruding at 265-280 degrees C with a screw speed of 120-150 rotations/minute.