利用PEI中丰富的氨基基团通过界面聚合制备纳滤膜或者协同利用EPTAC中的季胺基团表面接枝对商业纳滤膜进行表面正电改性均能有效提高NF膜对一二阳离子体系的分离性能同时表现出更加优异的耐污染性能。荷正电纳滤膜这些特点预示其可广泛应用于重金属废水处理、水软化和资源回收等领域中。将以上文字翻译成英文

The utilization of the abundant amino groups in PEI through interfacial polymerization can be used to prepare nanofiltration membranes, or the surface of commercial nanofiltration membranes can be positively modified through the co-utilization of quaternary amine groups in EPTAC. Both methods effectively improve the separation performance of NF membranes for mono- and divalent cation systems, while exhibiting superior anti-fouling properties. These characteristics of positively charged nanofiltration membranes indicate their wide application in heavy metal wastewater treatment, water softening, and resource recovery.