Composite reverse osmosis membrane and preparation method thereof

The present invention relates to a composite reverse osmosis membrane comprising a porous support and a polyamide layer on the surface of the porous support, the polyamide layer being a modified polyamide layer modified by a polyalkylene imine-based polymer and an imino compound, the polyalkylene imine polymer is selected from one or more of polyethyleneimine and polypropyleneimine. The composite reverse osmosis membrane disclosed by the invention can realize high pollution resistance and acid and alkali resistance while having high water permeability, and can be widely applied to various water treatments. 本发明涉及一种复合反渗透膜，其包括多孔支撑体和在所述多孔支撑体表面上的聚酰胺层，所述聚酰胺层是通过聚亚烷基亚胺类聚合物和亚氨基化合物进行改性的改性聚酰胺层，所述聚亚烷基亚胺类聚合物选自聚乙烯亚胺、聚丙烯亚胺中的一种或多种。本发明的复合反渗透膜能够在具有高水透过性的同时实现高的耐污染性和耐酸碱性，能够广泛用于各种水处理的应用。