膜科学与技术

PVDF/PSA管式复合纳滤膜的制备与耐酸碱的研究

作者：刘恩华，李世鹏，李士伟，杨利娟

单位： 1.天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室，天津 300387； 2.天津海普尔膜科技有限公司，天津 300304

关键词：聚磺酰胺；管式纳滤膜；界面聚合；耐酸碱

出版年,卷(期):页码： 2022,42(5):48-57

摘要：

本文以PVDF管式超滤膜为基膜，以无水哌嗪(PIP)为水相单体、以苯-1，3，5-三磺酰氯（TSC）为有机相单体，通过界面聚合制备PSA复合管式纳滤膜Ⅰ和Ⅱ，研究了添加剂的浓度、水相后吹风时间、有机相反应时间等对分离膜性能的影响，通过FTIR、XPS、SEM对PSA纳滤膜进行了表征。结果表明，制备的PSA纳滤膜Ⅰ和PSA纳滤膜Ⅱ在25℃、0.4MPa下对2000mg/L的MgSO4水溶液的截留率为95%和76%，通量分别为27 L·m-2·h-1和28 L·m-2·h-1；其耐酸碱性从ph=3~11上升为ph=0~14，且在不同浓度的酸碱溶液中浸泡22天，纳滤膜性能依然稳定。

In this paper, PSA composite tubular nanofiltration membranes ⅰ and ⅱ were prepared by interfacial polymerization using PVDF tubular ultrafiltration membrane as base membrane, anhydrous piperazine (PIP) as aqueous monomer and benzene-1, 3, 5-trisulfonyl chloride (TSC) as organic monomer. The effects of additive concentration, post-water blowing time and organic reaction time on the performance of PSA nanofiltration membrane were studied. The results showed that the retention rates of PSA NANofiltration membranes I and PSA nanofiltration membranes II to 2000mg/L MgSO4 aqueous solution at 25℃ and 0.4MPa were 95% and 76%, and the fluxes were 27 L·m-2·h-1 and 28 L·m-2·h-1, respectively. Its acid and alkali resistance increased from ph=3~12 to pH =0~14, and the nanofiltration membrane performance remained stable after soaking in different concentrations of acid and alkali solutions for 22 days.

刘恩华（1973-），男，副研究员，硕士生导师，主要研究方向为管式膜的制备与应用.E-mail：450221508@qq.com

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