▎ 摘　　要

NOVELTY - A graphene nano-fluid is obtained by oxidizing graphite raw material, ultrasonically dispersing obtained graphene oxide in a dispersion medium to obtain a graphene oxide solution with a concentration of 0.1-10 mg/mL, and stirring the solution in a reaction container at 15000-20000 rpm and 100-120 degrees C for 1-4 hours. USE - Preparation of graphene nano-fluid (claimed). ADVANTAGE - The method eliminates the need for functionalization using a surfactant and addition of reducing agent, is environmentally-friendly, easy and simple, and reduces equipment requirement. The method enables large-scale production of graphene nano-fluid having excellent dispersibility and stability, with good reproducibility. The reaction process can be controlled easily.