▎ 摘　　要

NOVELTY - Preparing graphene nylon chips involves: (1) allocating raw material components by (1a) accurately measuring caprolactam, graphene powder and dispersing agent, introducing into a premixing tank, heating the tank under hot water, fully stirring and self-circulating, preventing graphene from agglomerating in the tank and preparing graphene slurry, (1b) accurately measuring caprolactam, deionized water, molecular weight regulator and photothermal stabilizer, then introducing into tank, heating the tank and stirring to obtain a molecular weight regulator preparation liquid, (1c) accurately measuring deionized water and amine substance, then introducing into the premixing tank and uniformly stirring to obtain an amine substance blending solution and (1d) accurately measuring main material caprolactam, prepared graphene slurry, molecular weight regulator preparation liquid and amine substance blending solution and continuously feeding to a pre-polymerization tower; and (2) polymerizing. USE - The method is useful for preparing graphene nylon chips. ADVANTAGE - The method enables simple preparation of graphene nylon chips with uniform molecular weight distribution, good spinnability and excellent thermal stability. DETAILED DESCRIPTION - Preparing graphene nylon chips involves: (1) allocating raw material components by (1a) accurately measuring 100 pts. wt. caprolactam, 1 pt. wt. graphene powder and 0.1-0.3 pt. wt. dispersing agent, introducing into a premixing tank, heating the tank under hot water at 85-95 degrees C, fully stirring and self-circulating, preventing graphene from agglomerating in the tank and preparing graphene slurry, (1b) accurately measuring 100 pts. wt. caprolactam, 5-8 pts. wt. deionized water, 7-10 pts. wt. molecular weight regulator and 1-3 pts. wt. photothermal stabilizer, then introducing into premixed tank, heating the tank under hot water at 85-95 degrees C and sufficiently stirring for 2-4 hours to obtain a molecular weight regulator preparation liquid, (1c) accurately measuring 40-60 pts. wt. deionized water and 40-60 pts. wt. amine substance, then introducing into the premixing tank and uniformly stirring to obtain an amine substance blending solution and (1d) accurately measuring main material caprolactam, prepared graphene slurry, molecular weight regulator preparation liquid and amine substance blending solution in a weight ratio of 100:10:9:6 by a metering pump and continuously feeding to a pre-polymerization tower; (2) polymerizing graphene nylon by accurately measuring the components and introducing into the prepolymerization tower by metering pump, where the temperature in the prepolymerization tower is 260-280 degrees C, the pressure is 1-6 bar, the residence time is 4-8 hours, and the caprolactam ring-opening reaction mainly occurs in the prepolymerization tower, and transporting the material to a final polymerization tower by a gear pump after the reaction is completed, where the temperature in the final polymerization tower is 230-245 degrees C, the pressure is 0.1-0.5 bar, the residence time is 8-16 hours, and the materials in the final polymerization tower mainly undergoes polycondensation and graft copolymerization of graphene to obtain a graphene nylon melt; and (3) extruding the graphene nylon melt into a strip through a melt filter, cooling the strip under water, then pelletizing by a pelletizer to obtain a nylon section having a length of 2-2.2 mm, conveying the nylon section to an extraction tower through a conveying pump, extracting with hot water in the extraction tower at 80-90 degrees C for 35-40 hours, dehydrating the fully extracted nylon section by a dehydrator and then introducing into a drying tower, and drying the product at 115-125 degrees C under the circulation of nitrogen. An INDEPENDENT CLAIM is included for the graphene nylon chips prepared by the above method.