▎ 摘　　要

NOVELTY - Preparing aqueous modified graphene slurry comprises (i) adding de-ionized water, dispersing agent, stabilizer and co-solvent into a high speed cutting mill and pre-dispersing for 10-30 minutes, (ii) adding gradually modified graphene powder into the dispersion liquid, completely stirring for 10-30 minutes and uniformly dispersing, (iii) grinding the modified graphene slurry, finally high shear grinding the graphene slurry until the slurry fineness is not greater than 20 mu m. USE - The graphene slurry is useful in electric power steering polymerization. ADVANTAGE - The graphene slurry has excellent dispersion, good storage stability, and is suitable for industrial production, increases the modified graphene electric power steering molded polystyrene board strength by 200-300%, reduces thermal conductivity by 10-13%, has good mechanical performance and saves the energy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use method of aqueous modified graphene slurry, comprising adding the aqueous modified grapheme slurry into white electric power steering system for suspension polymerization, where the electric power steering system comprises pure water, styrene, initiator benzoyl peroxide, dispersant active calcium phosphate, pentane foaming agent, the weight ratio of the pure water and the styrene is 1-4:1, the amount of graphene is 0.5 wt.% of styrene, the amount of initiator benzoyl peroxide is 0.2-0.5 wt.%, the amount of dispersant is 0.5-1 wt.%, the amount of foaming agent (pentane) is 7-10 wt.%, and adding on foaming board to obtain the expandable polystyrene molding polyphenyl board.