▎ 摘　　要

NOVELTY - Graphene oxide water-based nano lubricant comprises 0.01-0.05 wt.% graphene oxide, 0.1-5 wt.% ascorbic acid, 50-70 wt.% polyethylene glycol and 24.95-49.89 wt.% deionized water. USE - Graphene oxide water-based nano lubricant. ADVANTAGE - The graphene oxide water-based nano lubricant is eco-friendly, and has improved stability and mechanical strength, better lubricity, and good cooling performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene oxide water-based nano lubricant, which involves: (A) mixing the polyethylene glycol into deionizedwater to completely dissolve to obtain primary solution; (B) adding the graphene oxide into theprimary solution and stirring uniformly to obtainoxidized graphene suspension; (C) dispersing oxidizedgraphene suspension ultrasonically to obtain oxidized graphene dispersion liquid; (D) dding the ascorbic acid into the graphene oxidedispersion and the constant-temperature water bathtreatment to obtain oxidized graphene water-basednano lubricant; and (E) adjusting the pH of the mixture to alkaline.