▎ 摘　　要

NOVELTY - Modified aqueous polyurethane material comprises modified aqueous polyurethane slurry comprising graphene oxide, aqueous polyurethane and L-ascorbic acid, where the weight ratio of the graphene oxide solid contained in the modified water-based polyurethane slurry, the mass ratio between the solid content of the graphene oxide and the L-ascorbic acid, and the secondary particle size distribution parameter of the graphene oxide satisfies the following relationship of 0.01% ≤ C/B*D ≤ 0.50%, C is the weight ratio, B is the mass ratio, and D is the secondary particle size distribution parameter. USE - The material is useful in the field of fabric, vamp, electronic product, packaging and food medicine. ADVANTAGE - The material: has coating performance; and utilizes the graphene oxide solid content of less than 0.40% (preferably 0.05-0.2 wt.%) (claimed). DETAILED DESCRIPTION - INDEPENDENT CLAIMs are also included for: Preparing modified aqueous polyurethane material. Modified aqueous polyurethane coating.