▎ 摘　　要

NOVELTY - Preparing waterproof and stain-resistant wallpaper comprises (1) taking the paper substrate, dipping it in ferric chloride solution, adding tannic acid, reacting for 10-20 seconds, adding Tris-HCl buffer solution, adjusting pH, stirring and reacting, taking out the paper substrate, washing it with deionized water, and drying it in vacuum to obtain a pretreated substrate; (2) taking graphene oxide microspheres and deionized water, mixing and ultrasonically treating, adding polylysine, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide, adjusting the pH to 6-7, and reacting at 25-28°C to obtain modified graphene oxide; and (3) taking polydimethylsiloxane and tetrahydrofuran, mixing and stirring, adding titanium dioxide and modified graphene oxide, continuously stirring, adding the pretreatment matrix, dipping for 30-40 minutes, taking it out, allowing to stand, and solidifying at 80-90°C to obtain the finished product. USE - The wallpaper is used as an indoor decoration material for pasting wall. ADVANTAGE - The method: forms tannic acid layer, tannic acid layer can protect the paper substrate, avoid subsequent influence of various organic solvents on the paper substrate, and improve the waterproof performance of the paper substrate. The wallpaper: is superhydrophobic, can actively prevents dirt and water, and has excellent antibacterial performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the waterproof and stain-resistant wallpaper is prepared by above mentioned method.