▎ 摘　　要

NOVELTY - Preparing easily dispersed graphene slurry, comprises (i) pre-dispersing expandable graphite, dibasic acid ester mixture and graphene dispersant, and then mixing to obtain expandable graphite dispersion, the graphene dispersant is perylene diimide having polyether polymer chain substituent i.e. anthra(2,1,9-def:6,5,10-d'e'f')diisoquinoline-1,3,8,10(2H,9H)-tetraone compound (I), and (ii) subjecting the expandable graphite dispersion to colloid mill cyclic exfoliation, and centrifuging to remove unexfoliated expandable graphite to obtain graphene slurry. USE - The easily dispersed graphene slurry is useful in preparing graphene heavy-duty anti-corrosion coating and graphene conductive heating slurry (all claimed). ADVANTAGE - The method : produces graphene slurry material, which has good solubility in dibasic acid ester mixture. DETAILED DESCRIPTION - Preparing easily dispersed graphene slurry, comprising (i) pre-dispersing expandable graphite, dibasic acid ester mixture and graphene dispersant, and then mixing to obtain expandable graphite dispersion, the graphene dispersant is perylene diimide having polyether polymer chain substituent i.e. anthra(2,1,9-def:6,5,10-d'e'f')diisoquinoline-1,3,8,10(2H,9H)-tetraone compound of formula (I), and (ii) subjecting the expandable graphite dispersion to colloid mill cyclic exfoliation, and centrifuging to remove unexfoliated expandable graphite to obtain graphene slurry. m = 1-20; n = 1-10; and m+n = greater than or equal to10. INDEPENDENT CLAIMS are included for: 1. use of easily dispersed graphene slurry in preparing graphene heavy-duty anti-corrosion coating, comprising stirring and mixing graphene slurry with a graphene content of 1-5 wt.%, xylene, zinc powder and epoxy resin, and then adding epoxy resin curing agent, leveling agent and thixotropic agent, and continuously stirring evenly to obtain graphene heavy-duty anti-corrosion coating; and 2. use of easily dispersed graphene slurry in preparing graphene conductive heating slurry, comprising stirring and mixing 40-60 pts. wt. graphene slurry with a graphene content of 1-5wt%, 0.5-1.5 pts. wt. conductive activated carbon, 0.1-0.3 pts. wt. phosphorus-based flame retardant, 15-25 pts. wt. polyurethane resin, 1-2 pts. wt. leveling agent and 0.5-1 pts. wt. defoamer to obtain graphene conductive heating paste, coating first layer of graphene conductive heating slurry on the polyethylene terephthalate film, drying at 130-150degrees Celsius, and then coating second layer of graphene conductive heating slurry and drying at 150-170degrees Celsius to obtain graphene heating film.