High-performance polyamide nanofiltration membrane as well as preparation method and application thereof

The invention provides a high-performance polyamide nanofiltration membrane as well as a preparation method and application thereof. The membrane comprises an organic solution containing trimesoyl chloride, an aqueous solution containing piperazine, an aqueous solution containing polymerizable amphiphilic molecules and a macroporous supported polyethersulfone base membrane; wherein the polymerizable amphiphilic molecules can be constructed on a water-oil interface to form a monomolecular layer film, and the monomolecular layer film is formed through an ultraviolet light initiation reaction; the trimesoyl chloride and the piperazine are subjected to a condensation polymerization reaction at the interface, so that an ultrathin active separation layer with rich wrinkle morphology is formed on the surface of the macroporous support base membrane. The preparation method is simple, and has a wide application prospect in the aspects of multivalent/monovalent salt separation, water treatment, water softening and the