膜科学与技术

哌嗪量对聚酰胺复合纳滤膜性能的影响

作者：李俊俊¹，陈涛¹，刘逸²，程新¹，谭惠芬¹，潘巧明¹

单位： 1，蓝星（杭州）膜工业有限公司，杭州 311106； 2，国家海洋局第二海洋研究所，杭州 310012

关键词：纳滤膜；聚哌嗪酰胺；界面聚合；阳离子

出版年,卷(期):页码： 2018,38(6):1-7

摘要：

在界面聚合制备聚哌嗪酰胺复合纳滤膜的过程中，研究了水相单体浓度和接触时间对膜性能的影响。水相单体采用哌嗪，浓度范围为0.1%~0.5%，接触时间范围为60~120 s。获得的系列纳滤膜分别进行了脱盐性能测试、红外光谱、表面Zeta电位等分析。结果显示，通过增加哌嗪单体浓度或者延长水相接触时间，均提高了底膜中哌嗪的量，具体地从52 mg/m2上升至389 mg/ m2，同时，纳滤膜对氯化钙的截留率从4%上升至96%。结构分析后得出结论，界面聚合形成的聚酰胺量是影响纳滤膜对氯化钙截留率的主要原因。

The effects of piperazine concentration and aqueous contact time on the performance of composite nanofiltration membrane are studied. The mass fraction of piperazine is between 0.1% and 0.5%. The contact time of aqueous phase is between 60 s and 120 s. The obtained membranes were characterized with desalination test, infrared spectrum and zeta potential. The results show that, both the addition of concentration and aqueous contact time increase the amount of piperazine on base membrane, and ultimately improve the rejection of calcium chloride from 4% to 96%. The amount of polyamide layer formed from interfacial polymerization is a key structure factor to the increasement of the rejection of calcium chloride.

第一作者简介：李俊俊（1984-），男，浙江省东阳市人，高级工程师，博士，从事液体分离膜研究与产业化，E-mail：lijj@chinawatertech.com。通讯作者，E-mail：panqm@chinawatertech.com。

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