▎ 摘　　要

NOVELTY - Method for preparing water-dispersible graphene, involves loading 1-allyloxy-3-(4-nonylphenol)-2-propanol polyoxyethylene (10) ether ammonium sulfate to graphene surface, and preparing water-dispersible graphene. USE - The method is useful for preparing water-dispersible graphene used for polyvinyl alcohol/graphene composite material for building material or textile material, and textile, pharmaceutical industry, food industry, construction, wood processing and chemical industry applications (all claimed). ADVANTAGE - The graphene has excellent dispersibility in water, and can be blended with polyvinyl alcohol, which improves the mechanical properties and flame retardant properties of polyvinyl alcohol materials. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a water-dispersible graphene prepared by the above method; (2) a polyvinyl alcohol/graphene composite material is prepared by blending the water-dispersible graphene and polyvinyl alcohol; and (3) a building material or textile material comprising the composite material.