▎ 摘　　要

NOVELTY - Aqueous coating comprises 5-25 pts. wt. polyvinyl alcohol, 5-25 pts. wt. silicone-acrylic emulsion, 1-5 pts. wt. graphene oxide, 10-50 pts. wt. deionized water, 1-10 pts. wt. nano silver and 0.1-10 pts. wt. activated carbon. USE - Aqueous coating for an outer layer of a mask (claimed). ADVANTAGE - The aqueous coating has excellent filtering effect and antibacterial property, and good water resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing aqueous coating, which involves: (A) weighing and mixing deionized water, nano silver, activated carbon, graphene oxide and polyvinyl alcohol and heating obtained mixture to obtain a clear solution; (B) cooling the clear solution, and adding a silicone-acrylic emulsion to cooled solution; and (C) adding remaining deionized water and stirring and filtering the mixture to obtain an aqueous coating.