▎ 摘　　要

NOVELTY - The preparation and dispersion method of graphene involves pre-processing graphite raw material to obtain expanded graphite, mixing with dispersant and polymer to obtain mixture, transferring the mixture to an internal mixer, mixing, pumping supercritical fluid into the mixer, infiltrating the expanded graphite layer by supercritical fluid, polymer shearing the expanded graphite in the mixer, stretching, dispersing, stripping the expanded graphite into graphene, dispersing the mixture in the polymer, releasing the pressure to normal pressure, and uniformly dispersing. USE - Preparation and dispersion method of graphene using supercritical fluid. ADVANTAGE - The method enables preparation and dispersion of graphene with excellent dispersibility. DETAILED DESCRIPTION - The preparation and dispersion method of graphene involves (A) pre-processing graphite raw material to obtain expanded graphite, (B) uniformly mixing expanded graphite, dispersant and polymer to obtain mixture, transferring the mixture to an internal mixer, mixing for 10-15 minutes, pumping supercritical fluid into the mixer, infiltrating the expanded graphite layer by supercritical fluid, polymer shearing the expanded graphite in the mixer, stretching, dispersing, rapidly stripping the expanded graphite into graphene under supercritical fluid permeation, and uniformly dispersing the mixture in the polymer, and (C) slowly releasing the pressure to the normal pressure after internal mixing is completed, and uniformly dispersing.