▎ 摘　　要

NOVELTY - Continuously preparing graphene in the screw machine by using supercritical fluid comprises (i) pre-processing graphite raw material, (ii) uniformly mixing expanded graphite and starch, polyvinyl alcohol, polyols and dispersing agent, adding screw extruder, cutting, and respectively injecting different pressure, passing, continuously rotating transport screw machine head discharge port fast decompression, supercritical fluid completely expansion peeling the layers of graphite and (iii) ultrasonically cleaning the material in clean water, and drying. USE - The method is useful for continuously preparing graphene in the screw machine by using supercritical fluid (claimed). ADVANTAGE - The method is simple, convenient to operate, easy to popularize and suitable for large-scale production and is economical. DETAILED DESCRIPTION - Continuously preparing graphene in the screw machine by using supercritical fluid comprises (i) pre-processing graphite raw material to obtain the expansion graphite; (ii) uniformly mixing the expanded graphite and starch, polyvinyl alcohol, polyols and dispersing agent to obtain mixture, adding screw extruder, where the screw machine are dispersed orientation space S1 is connected to the discharging end from feeding end, cutting carbide section S2, cutting off space S3, when the screw is rotated at a rotating speed of 100-1200 revolution/minute, during the screw rod in the rotating process, and respectively injecting different pressure to S1, S2, S3 of the supercritical fluid, so that one of the supercritical fluid to achieve a supercritical state, passing through the screw of the, continuously rotating transport screw machine head discharge port fast decompression, supercritical fluid completely expansion peeling the layers of graphite and (iii) ultrasonically cleaning the material obtained in the step (ii) in clean water, and drying to obtain the graphene.