The green process of highly dispersible graphene developed by the Textile Research Institute uses a non-toxic and low-cost supercritical CO2 system and the addition of surface modifiers to obtain highly stable functional graphene, which can improve the number of layers, defects and The sheet diameter improves the thermal conductivity effect. The obtained graphene layer number is 5 layers, the thickness is 1.5 nm, the defect rate ID/IG = 0.25, the maximum particle size is 10 um, and the thermal conductivity is 532 W/m•K.