▎ 摘　　要

NOVELTY - Preparing graphene quantum dots reinforced polyamide fiber comprises e.g. step (i) preparation of polyamide 6-graphene quantum dots (PA6-GQD) master batch comprises (1) taking 0.1-1 pts. wt. graphene quantum dots, 0.1-1 pts. wt. dispersant, dissolving in 98-99.8 pts. wt. deionized water, the graphene quantum dots of graphite sheet layer is 1-3 and size of 10-100 nm; ultrasonic dispersing to obtain a homogeneous aqueous dispersion of graphene quantum dot. USE - The method of preparing graphene quantum dots reinforced polyamide fiber is useful for tire cord, industrial fabrics, clothing, fishing nets and defense industry. ADVANTAGE - The method is simple, environmentally-friendly and economical. DETAILED DESCRIPTION - Preparing graphene quantum dots reinforced polyamide fiber comprises step (i) preparation of polyamide 6-graphene quantum dots (PA6-GQD) master batch comprises (1) taking 0.1-1 pts. wt. graphene quantum dots, 0.1-1 pts. wt. dispersant, dissolving in 98-99.8 pts. wt. deionized water, the graphene quantum dots of graphite sheet layer is 1-3 and size of 10-100 nm; ultrasonic dispersing to obtain a homogeneous aqueous dispersion of graphene quantum dot; the ultrasonic dispersing operation is ultrasonic wave dispersing or high pressure homogenizing treatment, using ultrasonic wave cell crushing mchine, its power is 1000-4000 W, or using pressure homogenizer, its power is 2500 W; (2) vacuum filtering of the graphene quantum dot solution for 0.5-2 hours, vacuum drying obtain graphene quantum dot containing a dispersing agent at 60-100 degrees C for 0.5-2 hours; (3) taking 84-99 pts. wt. caprolactam, 0.5 to 15 pts. wt. graphene quantum dots, 0.5-1 pts. wt. initiator, stirring, ultrasonic dispersing and formulating into PA6-GQD mixture; the initiator is 6-aminocaproic acid, butyric acid or phosphoric acid; the dispersing agent is less a)-c) expressed in either case: a) polyoxyethylene ethers or esters nonionic surfactant, b) sulfonates, sulfates, phosphates or phosphites anionic surfactant, c) amino acids, imidazoles or amine oxide amphoteric surfactant; and (4) pre-polymerizing the above mixture at 150-200 degrees C for 1-3 hours, polymerizing at 250-270 degrees C for 10-30 hours, granulating, washing and vacuum drying at 60-100 degrees C for 2-5 hours to obtain PA6-GQD master batch; and step (ii) melt spinning (d) taking 1-10 pts. wt. PA6-GQD masterbatch, 6-10 to 20 pts. wt. pure polyamide, introducing into screw extruder melt blending and extruding into slices; and (e) preparing complex fibers PA6-GQD using ordinary melt spinning machine by melt spinning; melt spinning process the spinning temperature is 220-280 degrees C, depending on the application of the complex fibers PA6-GQD for oiling, curling and/or cut off. An INDEPENDENT CLAIM is also included for preparing graphene quantum dots reinforced polyamide fiber is obtained by above claim 1.