Selective, water-permeable membranes for reverse osmosis and nanofiltration are prepared by interfacially polymerizing on a microporous support an essentially monomeric bipiperidine reactant, and an essentially monomeric amine-reactive polyfunctional aromatic or cycloaliphatic acyl halide having on the average at least about 2 acyl halide groups per reactant molecule. The polymerization is optionally carried out in the presence of a monomeric amine salt, which can increase the flux rate of the resulting membrane.
用于反渗透和纳滤的选择性透
水膜的制备方法是在微孔载体上将基本上是单体的双
哌啶反应物和基本上是单体的胺反应性多官能团芳香族或环脂族酰基卤进行界面聚合,每个反应物分子平均至少具有约 2 个酰基卤基团。聚合可选择在有单体胺盐存在的情况下进行,这样可以提高所得膜的通量。