β-环糊精修饰哌嗪基聚酰胺制备耐氯复合纳滤膜  

Preparation of Chlorine-Resistant Nanofiltration Membranes by Modifying Piperazine Polyamide withβ-Cyclodextrin

作　　者：张明铎 嵇华忠 郑俊芝 周学良 孙孟超 刘大朋 洪耀良 ZHANG Mingduo;JI Huazhong;ZHENG Junzhi;ZHOU Xueliang;SUN Mengchao;LIU Dapeng;HONG Yaoliang(School of Environment Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Separation and Purification Materials and Technology Engineering Research Center,Suzhou 215009,China;Suzhou Fiber Inspection Institute,Suzhou 215128,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]江苏省分离净化材料与技术工程研究中心,江苏苏州215009 [3]苏州市纤维检验院,江苏苏州215128

出　　处：《塑料工业》2025年第1期15-23,共9页China Plastics Industry

摘　　要：为提高聚酰胺纳滤膜的耐氯性能,本研究以哌嗪基聚酰胺分离层作为基础层,利用膜表面残余的酰氯基团,再次进行界面反应,将β-环糊精(β-CD)修饰到膜表面制备改性复合纳滤膜,对改性复合膜的表面形貌、化学组成和特性进行了表征,阐述了复合膜结构和性能之间的关系。通过对比实验得出β-CD最佳反应质量分数为0.2%,反应时间为2 min,经优化的改性膜纯水通量达到126.40 L/(m^(2)·h·MPa),对硫酸钠(Na2SO_(4))、硫酸镁(MgSO_(4))、无水氯化镁(MgCl_(2))、氯化钠(NaCl)的截留率分别为95.90%、91.76%、36.43%和31.76%。改性膜在不同pH值的次氯酸钠溶液中浸泡后,表现出稳定的高通量和盐截留性能,具备优异的耐氯特性,在72 h的长期运行实验中,改性膜性能未发生较大变化,具备长期运行的要求。本研究结合了β-环糊精的纳米空腔结构与酯基的耐氯特性,为高渗透选择性耐氯纳滤膜的制备提供了一种新策略。To improve the chlorine resistance of polyamide nanofiltration membranes,the piperazinyl polyamide separation layer was used as the base layer,andβ-cyclodextrin(β-CD)was modified to the membrane surface by the interfacial reaction using residual acyl chloride groups,finally obtaining the modified composite membranes.The surface morphologies,chemical compositions and properties of the modified composite membranes were characterized.The relationships between the structures and properties of the composite membranes were described.The results show that the optimal reaction mass fraction is 0.2%and the reaction time is 2 min.The optimized pure water flux of the modified membrane reaches 126.40 L/(m^(2)·h·MPa).The retention rates of Na2SO_(4),MgSO_(4),MgCl_(2 )and NaCl are 95.90%,91.76%,36.43%and 31.76%,respectively.After soaking in sodium hypochlorite solution at different pH values,the modified membranes show stable high flux and salt retention performance,and have excellent chlorine resistance.In the long-term operation experiment for 72 h,the performances of the modified membranes do not change greatly,meeting the requirements for long-term operation.In this study,the nano-cavity structure ofβ-cyclodextrin and the chlorine-resistant properties of ester groups were combined,providing a new strategy for the preparation of highly permeable selective chlorine-resistant nanofiltration membranes.

关 键 词：纳滤膜 改性 Β-环糊精 耐氯 

分 类 号：TQ051.893[化学工程]