Nanometer crystal cellulose composite antioxidant nano-filtration membrane and method for preparing same

The invention discloses a nanometer crystal cellulose composite antioxidant nano-filtration membrane and a method for preparing the same. The method includes carrying out interfacial polymerization on porous support membranes by the aid of water-phase monomers and oil-phase monomers; forming a nanometer crystal cellulose composite aromatic polymer functional skin layer on each porous support membrane to obtain the nanometer crystal cellulose composite antioxidant nano-filtration membrane. The nanometer crystal cellulose composite antioxidant nano-filtration membrane and the method have the advantages that nanometer crystal celluloses are compounded in the aromatic polymer functional skin layers of the nanometer crystal cellulose composite antioxidant nano-filtration membrane, the surfaces of the nanometer crystal celluloses contain a large quantity of hydroxyl, and accordingly the water flux of the nanometer crystal cellulose composite antioxidant nano-filtration membrane can be greatly improved; ester bonds can be formed by the hydroxyl of the surfaces of the nanometer crystal celluloses in interfacial polymerization procedures and can stably exist in sodium hypochlorite, and accordingly the nanometer crystal cellulose composite antioxidant nano-filtration membrane is difficult to oxidize in acid pickling procedures and is excellent in antioxidant activity; procedures for preparing the nanometer crystal cellulose composite antioxidant nano-filtration membrane are easy to implement, reaction conditions are mild, and accordingly the nanometer crystal cellulose composite antioxidant nano-filtration membrane and the method have excellent industrial production bases and broad application prospects.