▎ 摘　　要

NOVELTY - Graphene oxide/sodium alginate composite nanofiltration membrane, comprises a graphene oxide sodium alginate stable structure GO-SA prepared by sodium alginate surface modification as spacer of graphene oxide GO layer and graphene oxide sheet layer stack, where the surface of the composite nano-filtration membrane is uneven. The graphene oxide sodium alginate stable structure GO-SA is prepared by sodium alginate surface modification is embedded between graphene oxide nano-layers in the stacked structure. The graphene oxide sodium alginate stable structure GO-SA is generated by combining an oxygen-containing group on graphene oxide and an oxygen-containing group on sodium alginate through a hydrogen bond and is prepared by mixing sodium alginate SA aqueous solution with the concentration of 20mg/ml and graphene oxide GO aqueous solution with the concentration of 4mg/mL, ultrasonically oscillating, stirring and freeze-drying to obtain the product. USE - The composite nanofiltration membrane is useful in preparing water flux and filtering performance device (claimed) and textile dye waste water processing device. ADVANTAGE - The membrane: has controllable water flux or interception rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a preparation method of the graphene oxide/sodium alginate composite nanofiltration membrane.