▎ 摘　　要

NOVELTY - Cellulose nanofiber aerogel photothermal interface water evaporation material, comprises dispersion liquid of cellulose nanofibers, polyvinyl alcohol, graphene oxide, cross-linking agent and catalyst which is poured into a mold for freezing, and then freeze-dried to form aerogels, which can be used for aerogels at high temperature, cross-linking and then reducing graphene oxide. USE - Used as cellulose nanofiber aerogel photothermal interface water evaporation material. ADVANTAGE - The evaporation material is economical; has high mechanical strength, strong waterproof stability, low density and self-floating, low heat conduction, high photo-thermal performance and is environmentally-friendly, and so safe. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing nanofiber aerogel photothermal interface water evaporation material comprising (i) obtaining certain amount of 6% cellulose nanofiber dispersion into a beaker and stir at room temperature; (ii) preparing graphene oxide solutions of different concentrations, the concentration range is 1-4mg/ml, takingthe graphene oxide solution of the same quality, adding certain amount of polyvinyl alcohol to the graphene oxide solution for heating and dissolving, where the mass ratio of the polyvinyl alcohol to the dry cellulose nanofibers added is 3:10, until the polyvinyl alcohol is completely after dissolving, pouring into the beaker, adding butanetetracarboxylic acid and sodium hypophosphite, adding quality of butanetetracarboxylic acid and sodium hypophosphite same as that of polyvinyl alcohol, stirring for 4-5 hours; (iii) pouring the evenly dispersed mixture into the mold, freezing in a refrigerator, and then freeze-drying in a freeze dryer to prepare an aerogel; (iv) cross-link the aerogel at a high temperature; and(v) condensing the aerogel glue to restore.