Method for preparing graphene solution based on supercritical carbon dioxide and pyrenyl polymers

The present invention belongs to the technical field of graphene prepared, discloses a method of supercritical carbon dioxide based on the graphene solutions were prepared and pyrenyl polymer. Graphite and 10 ~ 20mg of 15.4 ~ 30.8mg pyrenyl polymer dispersed in dimethyl sulfoxide in 5 ~ 10ml, graphite and then the resulting polymer suspension was placed pyrenyl supercritical carbon dioxide reaction apparatus, at 40 ~ 45 ℃, 12 ~ 16MPa 3 ~ 6h after stirring the reaction the pressure, the resulting reaction pyrenyl polymer after liquid separation to remove the supernatant, the precipitate was repeatedly washed with a solvent to remove unreacted re-dispersed in the same kinds of the solvent, and finally removing the non-exfoliated graphite, graphene solution. The present invention solves the problem of high current concentration even difficult to prepare a solution of graphene, high yield, high quality, and preparation of functionalized graphene achieved in one step, and the yield of defect-free graphene layer can be up to 51.8wt%, a preparation of graphene simple solution, effective method.