▎ 摘　　要

NOVELTY - Improving dispersing performance of graphene, comprises (i) adding N,N-dimethylformamide into a container, mixing and sealing; (ii) subjecting the container to an ice bath treatment to obtain graphene/ dimethylformamide mixture and filtering to obtain surface functionalized graphene; (iii) dispersing and adding surfactant and vitamin C to obtain mixed solution; (iv) mixing the mixture by an ultrasonic cell probe pulverizer, centrifuging and collecting upper layer liquid to obtain dispersion liquid; and (v) placing the dispersion in a three-necked flask equipped with a constant flow pump, heating to 90-100 degrees C, adding hydrazine hydrate and vitamin C, and reacting under constant-speed magnetic stirring for 1.5-3 hours, and cooling to room temperature. USE - The method is useful for improving dispersing performance of graphene. ADVANTAGE - The graphene improves dispersing performance; has high dispersing rate, high dispersion stability; and meets industrial production. DETAILED DESCRIPTION - Improving dispersing performance of graphene, comprises (i) adding 28-32 times N,N-dimethylformamide of mass of graphene into a container, mixing uniformly, sealing container using ultrasonic cell crusher to ultrasound, where the ultrasonic frequency is 23-25 kHz, ultrasonic time is 3 seconds and interval time is 2 seconds, respectively; (ii) subjecting the container to an ice bath treatment in order to make temperature of the dispersion lower than 30 degrees C to obtain graphene/ dimethylformamide mixture and filtering to obtain surface functionalized graphene; (iii) dispersing the graphene functionalized in deionized water through ultrasonic water bath, where the ultrasonic power is 300-500 W, ultrasonic time is 15-25 minutes, the content of graphene functionalizing the surface in the solution is 1 mg/ml, and adding surfactant and vitamin C to obtain mixed solution; (iv) mixing uniformly the mixture by an ultrasonic cell probe pulverizer, centrifuging under centrifugal speed of 2000-3000 revolutions/minute for 15-20 minutes, and collecting the upper layer liquid to obtain dispersion liquid; and (v) placing the dispersion in a three-necked flask equipped with a constant flow pump, heating to 90-100 degrees C, adding hydrazine hydrate and vitamin C, and reacting under constant-speed magnetic stirring for 1.5-3 hours, and cooling to room temperature.