▎ 摘　　要

NOVELTY - Preparing high elastic aqueous polyurethane/graphene hydrogel comprises e.g. (1) dispersing graphene oxide in deionized water, and performing ultrasonication to make it uniformly dispersed in deionized water to obtain graphene oxide aqueous dispersion, (2) stirring and mixing graphene oxide aqueous dispersion with aqueous polyurethane liquid and ascorbic acid evenly, (3) stirring and foaming mixed dispersion, (4) placing aqueous polyurethane/graphene oxide foam into a specific mold, and heating, and reacting for a period of time to obtain aqueous polyurethane/graphene hydrogel, (5) placing aqueous polyurethane/graphene hydrogel in deionized water for dialysis soaking to remove reaction residue, (6) freezing aqueous polyurethane/graphene hydrogel soaked in dialysis, and thawing completely, washing with deionized water and absolute ethanol, and (7) placing rinsed aqueous polyurethane/graphene hydrogel in an oven for normal pressure drying, and performing annealing treatment. USE - The method is useful for preparing high elastic aqueous polyurethane/graphene hydrogel, which is useful in water purification, pressure sensing, air purification and other occasions. ADVANTAGE - The high elastic aqueous polyurethane/graphene hydrogel is environmentally friendly. DETAILED DESCRIPTION - Preparing high elastic aqueous polyurethane/graphene hydrogel comprises (1) dispersing graphene oxide in deionized water, and performing ultrasonication to make it uniformly dispersed in deionized water to obtain graphene oxide aqueous dispersion, (2) stirring and mixing graphene oxide aqueous dispersion with aqueous polyurethane liquid and ascorbic acid evenly to obtain a mixed dispersion, (3) stirring and foaming mixed dispersion to obtain aqueous polyurethane/graphene oxide foam, (4) placing aqueous polyurethane/graphene oxide foam into a specific mold, and heating, and reacting for a period of time to obtain aqueous polyurethane/graphene hydrogel, (5) placing aqueous polyurethane/graphene hydrogel in deionized water for dialysis soaking to remove reaction residue, (6) freezing aqueous polyurethane/graphene hydrogel soaked in dialysis, and thawing completely, washing with deionized water and absolute ethanol respectively, and (7) placing rinsed aqueous polyurethane/graphene hydrogel in an oven for normal pressure drying, and performing annealing treatment to obtain aqueous polyurethane/graphene hydrogel. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating the method for preparing high elastic aqueous polyurethane/graphene hydrogel (Drawing includes non-English language text).