▎ 摘　　要

NOVELTY - Modified wet film comprises carboxymethyl cellulose, polytetrafluoroethylene, graphene oxide, gamma-Aminopropyltriethoxysilane silane coupling agent (KH550), ceramic oxide, lithium (Li)-containing metal salt, calcium chloride (CaCl2), polymer Vinyl pyrrolidone, polyvinyl alcohol, acetic acid, ethanol, and water. USE - Modified wet film used in preparing heat exchange device for external air conditioner (claimed). ADVANTAGE - The modified wet film has good self-cleaning performance, ensure the entering of the room clean, acid and alkali resistance, mildew resistance, inflaming retarding, has wide application prospect, and is non-toxic. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing modified wet film, involves: (A) obtaining modified inorganic filler by mixing ethanol with half the amount of water, adding silane coupling agent KH550, stirring well, then adding graphene oxide and ceramic oxide while stirring, and further stirring for 30-50 minutes after stopping adding to get Modified inorganic filler; (B) obtaining casting film solution by adding the remaining water to the acetic acid, stirring uniformly to obtain an acetic acid aqueous solution, and modifying the modified inorganic filler prepared, carboxymethyl cellulose, a metal salt containing Li, polyvinylpyrrolidone, and a polymer Vinyl alcohol is mixed uniformly placed in an acetic acid aqueous solution, controlled at a temperature of 60 degrees C, and stirring at a constant temperature until it dissolves into a transparent and uniform casting film solution, which is left to stand for defoaming until use; (C) obtaining wet film by casting film solution prepared uniformly coated on a clean glass plate of appropriate size, and the thickness of the film is controlled by a wiper to 100 mu m, and exposing to air for 2-5 minutes; and (D) immersing glass plate and the base film in clean water together, and phase conversion occurs between the base film and the water phase, where a film is formed and automatically separated from the glass plate, and at this time, the film separated from the glass plate is taken out of the water and immersed in another clean Continue to soak in water to remove excess solvent, and after soaking, removing the membrane and place it in a constant temperature drying oven, control the temperature at 60 degrees C, and drying it at a constant temperature for 2-4 hours to obtain modified wet membrane.