▎ 摘　　要

NOVELTY - Preparation of aqueous dispersion of graphene involves mixing graphene powder and water, obtaining graphene pre-wetting fluid, transferring graphene pre-wetting liquid to primary dispersing apparatus, stirring, obtaining primary dispersion liquid, adding obtained primary dispersion to vacuum ultrasound apparatus, processing for 1-30 minutes, obtaining secondary dispersion liquid, placing obtained dispersion in stabilized electric field device, applying voltage of 50-1000 V, and stabilizing for 10-300 seconds. USE - Preparation of aqueous dispersion of graphene (claimed). ADVANTAGE - The method stably and economically provides aqueous dispersion of graphene having high dispersion degree, by simple method without affecting the environment. DETAILED DESCRIPTION - Preparation of aqueous dispersion of graphene involves mixing graphene powder and water in the mass ratio of 1:9-999, adding to stirring vessel, stirring using stirrer, adjusting the rotational speed of the agitator as 10-500 rpm, stirring for 10-30 minutes, obtaining graphene pre-wetting fluid, transferring the graphene pre-wetting liquid to primary dispersing apparatus, controlling rotational speed as 1000-10000 rpm, obtaining primary dispersion liquid, adding obtained primary dispersion to vacuum ultrasound apparatus in the vacuum pressure of -0.01 MPa to -0.1 MPa and ultrasonic power of 500-2000 W, processing for 1-30 minutes, obtaining secondary dispersion liquid, placing obtained dispersion in stabilized electric field device, applying voltage of 50-1000 V, and stabilizing for 10-300 seconds.