▎ 摘　　要

NOVELTY - Waterproof coating includes a combination of single-layer graphene oxide and polyvinyl alcohol. The alcoholysis degree of the polyvinyl alcohol is not less than 97.5%. USE - Waterproof coating for a solar back sheet. ADVANTAGE - The waterproof coating has excellent barrier property, high temperature and high humidity resistance, and high barrier performance, and can be applied to the solar back plate of solar backboard. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a waterproof coating for a solar back sheet, which involves dispersing single-layer graphene oxide and polyvinyl alcohol in water to obtain coating solution, coating the coating solution on the surface of the substrate, drying, and etherifying to obtain the water-blocking coating for solar back sheets.