Alkali-stabilized semipermeable membranes and methods thereof

• Main Authors: LAPIDO, POLINA, GINZBURG VERA, GINZBURG BORIS, SHALEV HAGIT
• Format: Patent
• Language: Chinese; English
• Published: 14.10.2022
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The present invention provides a semipermeable membrane having enhanced alkaline stability and a method of forming a semipermeable membrane having enhanced alkaline stability, the method comprising the steps of: providing an ultrafiltration (UF) alkaline membrane; immersing the UF membrane in a solution comprising at least one substance selected from the group consisting of polymers, preferably polyethyleneimine (PEI), condensate solutions, and mixtures thereof, thereby forming a reactive moiety on the UF membrane; and forming at least one first layer on at least part of the UF alkaline support membrane by soaking the UF alkaline support membrane of step b in a solution comprising at least one component selected from the group consisting of polymers, preferably polyethyleneimine (PEI), condensate solutions and mixtures thereof, thereby forming a crosslinked skin layer on the surface of the alkaline membrane. 本发明提供了具有增强的碱性稳定性的半透膜和形成具有增强的碱性稳定性的半透膜的方法，该方法包括步骤：提供超滤(UF)碱性膜；将所述UF膜浸泡在包括选自优选为聚乙烯亚胺(PEI)的聚合物、缩合物溶液和它们的混