▎ 摘　　要

NOVELTY - The utility model claims an expansion reaction device for preparing graphene, relating to the technical graphene of preparation. The device comprises a tank body and a temperature control mechanism, the tank body is used for reservoir expansion liquid, the tank body is provided with a material port connected with the expansion liquid, the temperature control mechanism is used for controlling the temperature of the expansion liquid in the tank body, the tank body is provided with a ventilating film for ventilating and liquid-tight, the ventilating film divides the tank body into two parts, which are respectively a first part and a second part, wherein the expansion liquid is located in the first part, the second part is a cavity, and the gas phase of the first part and the ventilating film contact the second part is provided with a second discharge outlet, the first part is provided with a first discharge outlet The utility model is provided with a ventilating film in the tank body, the ventilating film has a ventilating function, the gas above the expanding liquid can be discharged so as to bind the graphite raw material layer in the expanding liquid, therefore, the graphite intercalation is raw material in the soaking state, and the expanding liquid contact large area, which saves the reaction time.