▎ 摘　　要

NOVELTY - Preparing sodium alginate mixed matrix membrane for aqueous alcohol separation, involves preparing graphene oxide-sodium lignin sulfonate dispersion mixing 0.03 g/mL graphene oxide solution and the sodium lignin sulfonate solution, ultrasonically mixing uniformly, adding small amount of vitamin C. The mixture of graphene oxide-sodium lignin sulfonate is reacted at 95 degrees C for a certain period of time under vigorous stirring, and reaction is finished, cooling to room temperature, ultrasonication, dispersing to obtain a uniform dispersion of graphene oxide-sodium lignin sulfonate. The membrane-forming liquid is configured by dissolving sodium alginate in water and stirring at a constant temperature to completely dissolve 0.03 g/mL sodium alginate. The film forming solution is then added to the reduced graphene oxide-sodium lignin sulfonate dispersion, and dispersion to the sodium alginate are mixed in volume ratio of 1:10. The mixture is uniformly dispersed by stirring and ultrasonication. USE - Method for preparing sodium alginate mixed matrix membrane for aqueous alcohol separation. ADVANTAGE - The method enables to prepare sodium alginate mixed matrix membrane which improves alcohol water mixed liquid separating performance. DETAILED DESCRIPTION - Preparing sodium alginate mixed matrix membrane for aqueous alcohol separation, involves preparing graphene oxide-sodium lignin sulfonate dispersion mixing 0.03 g/mL graphene oxide solution and the sodium lignin sulfonate solution, ultrasonically mixing uniformly, adding small amount of vitamin C. The mixture of graphene oxide-sodium lignin sulfonate is reacted at 95 degrees C for a certain period of time under vigorous stirring, and reaction is finished, cooling to room temperature, ultrasonication, dispersing to obtain a uniform dispersion of graphene oxide-sodium lignin sulfonate. The membrane-forming liquid is configured by dissolving sodium alginate in water and stirring at a constant temperature to completely dissolve 0.03 g/ml sodium alginate. The film forming solution is then added to the reduced graphene oxide-sodium lignin sulfonate dispersion, and dispersion to the sodium alginate are mixed in volume ratio of 1:10. The mixture is uniformly dispersed by stirring and ultrasonication, and allowed to stand off. The bubble is obtained as a film forming liquid, settled film forming liquid is uniformly poured on a dry, clean and smooth ultrafiltration base film, and a wet film of a certain thickness is scraped with a doctor blade and dried at room temperature. Then, the dried film is placed in 0.5 mol/L chlorination. The mixture was crosslinked in a calcium solution for 10 minutes. The membrane is washed with water and thoroughly dried at room temperature to obtain a pervaporation membrane.