| abstract |
An in-situ interface polymerization composite nanofiltration membrane with excellent osmotic separation performance, a preparation method and an application thereof relate to the field of membrane separation technology and new materials. First, inorganic salts, organic small molecule pore-forming agents, polymers and organic solvents are prepared into a membrane-forming liquid, and a non-solvent phase inversion method is used to prepare an ultrafiltration bottom membrane; With n-hexane solution of polybasic acid chloride as oil phase, in-situ interfacial polymerization reaction is carried out to form in-situ interfacial polymerization composite nanofiltration membrane with excellent osmotic separation performance, which can be used for all divalent inorganic salts, organic Small molecules and small molecule colloidal particles. Due to the in-situ interfacial polymerization, the intermediate layer and the nanofiltration layer are formed at the same time, which not only improves the bonding force between the ultrafiltration bottom membrane, the intermediate layer and the nanofiltration layer, but also simplifies the preparation steps of the high-performance composite nanofiltration membrane and reduces the the preparation cost. |