▎ 摘　　要

NOVELTY - Reducing oxidation graphene/phosphoric acid esterification polyvinyl alcohol composite gas gel involves adding the predetermined amount of polyvinyl alcohol, N, N-dimethyl formamide, and phosphorus pentoxide into the reaction container, mixing uniformly, the reaction container in the oil bath to react, after the reaction is finished, wash the product, and drying to obtain the phosphoric acid esterified polyvinyl alcohol, using improved hummers method to prepare the oxidation graphene, dispersing the oxidized graphene in the deionized water, and adding a predetermined amount of urea, mixing uniformly to obtain the oxidized graphene then adding the phosphoric acid esterified polyvinyl alcohol into the oxidized graphene solution, mixing uniformly, transferring the mixed solution to the high-pressure reaction kettle for hydro-thermal reaction, forming a cylindrical three-dimensional composite hydrogel at last, and taking out the cylindrical three-dimensional composite hydrogel. USE - Method for reducing oxidation graphene/phosphoric acid esterification polyvinyl alcohol composite gas gel (claimed). ADVANTAGE - The method can fully use the super-hydrophilicity of the phosphoric acid esterified polyvinyl alcohol and the excellent optical performance and the higher specific surface area of the oxidation graphene to obtain the reduced oxidation graphene phosphoric acid esterified polyvinyl alcohol composite gas gel's strong mechanical property, super-hydrophilicity, low heat conductivity, and high photo-thermal conversion efficiency. DETAILED DESCRIPTION - Reducing oxidation graphene/phosphoric acid esterification polyvinyl alcohol composite gas gel involves adding the predetermined amount of polyvinyl alcohol, N, N-dimethyl formamide, and phosphorus pentoxide into the reaction container, mixing uniformly, the reaction container in the oil bath to react, after the reaction is finished, wash the product, and drying to obtain the phosphoric acid esterified polyvinyl alcohol, using improved hummers method to prepare the oxidation graphene, dispersing the oxidized graphene in the deionized water, and adding a predetermined amount of urea, mixing uniformly to obtain the oxidized graphene then adding the phosphoric acid esterified polyvinyl alcohol into the oxidized graphene solution, mixing uniformly, transferring the mixed solution to the high-pressure reaction kettle for hydro-thermal reaction, forming a cylindrical three-dimensional composite hydrogel, at last, taking out the cylindrical three-dimensional composite hydrogel, washing and freezing and drying to obtain the reducing oxidation graphene/phosphoric acid esterified polyvinyl alcohol composite gas gel. An INDEPENDENT CLAIM is included for an application of the reducing oxidation graphene/phosphoric acid esterified polyvinyl alcohol composite gas gel, which comprises placing the reducing oxidized graphene/phosphate esterified polyvinyl alcohol composite gas gel in the water to be processed, under the simulated sunshine, making the environment temperature and humidity as a constant value, the change of the mass sum of the water body monitored by the electronic analysis balance, and the reduced oxidation graphene/phosphoric acid esterified polyvinyl alcohol composite gas gel calculating the photo-thermal evaporation rate of the solar light drive.