Alginate hydrogel interlayer assisted interfacial polymerization for enhancing the separation performance of reverse osmosis membrane

Reverse osmosis (RO) is widely used in water purification process. However, most commercial RO membranes have low water permeance, and encounter a “trade-off” effect between permeance and rejection. In this work, a kind of RO membrane with an in-situ formed film of sodium alginate (SA) hydrogel as an interlayer on the surface of a polysulfone (PSf) substrate has been extensively investigated. The SA hydrogel interlayer significantly controls and...