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高性能内压式中空纤维纳滤膜的制备及其性能

作者：刘少校，吕兴华，王恩琳，刘立扬，李树轩，苏保卫

单位：中国海洋大学化学化工学院/海洋化学理论与工程技术教育部重点实验室，山东青岛266100

关键词：纳滤膜；中空纤维；重金属离子；内压式

DOI号：

分类号： TQ 028.8

出版年,卷(期):页码： 2022,42(4):9-21

摘要：

纳滤（NF）膜在海水软化和废水回收利用等方面已经被广泛应用。内压式中空纤维（HF）NF膜因其填充密度大、皮层不易被破坏等特点具有广阔的发展前景。以自制的聚砜（PSf）HF超滤（UF）膜为基膜，采用界面聚合（IP）法，分别以哌嗪（PIP）和均苯三甲酰氯（TMC）为水相和油相单体，以十二烷基硫酸钠（SDS）和三乙胺（TEA）为水相添加剂，在基膜内表面完成IP反应，制备出内压式HFNF膜。考察了水相流速、氮气吹扫时间、PIP浓度以及TEA浓度对内压式HFNF膜分离性能的影响。结果表明，最优条件下制备的内压式HFNF膜在0.4 MPa的测试条件下，对于2000 mg/L的硫酸钠（Na2SO4）溶液中的Na2SO4截留率可达97.3%，水渗透率达93 L/（m2 h MPa）；对于2000 mg/L的硫酸锌（ZnSO4）、硫酸锰（MnSO4）溶液中的ZnSO4、MnSO4的截留率均达到93%以上。所制备的内压式HFNF膜有良好的耐污染性能和耐氯性能。

Nanofiltration (NF) membrane has been widely used in seawater softening and wastewater recycling. Internally pressurized hollow fiber (HF) NF membrane has broad development prospects as it possesses high filling density and difficult to damage the polyamide layer. In this paper, Polysulfone (PSf) HF ultrafiltration membrane was used as the substrate membrane, the internally pressurized HFNF membrane was prepared by interfacial polymerization (IP) on the inner surface of the substrate membrane with piperazine (PIP) and Trimesoyl chloride (TMC) as aqueous and organic monomers and Sodium dodecyl sulfate (SDS) and triethylamine (TEA) as aqueous additives. The effects of water phase flow rate, N2 purging time, PIP concentration and TEA concentration on the separation performance of internally pressurized HFNF membrane were studied. The performance test results showed that the internally pressurized HFNF membrane prepared under the optimal conditions had higher water permeability of 93 L/ (m2 h MPa) and the Na2SO4 rejection of 97.2% for 2000 mg/L Na2SO4 solution at 0.4 MPa. For 2000 mg/L heavy metal salt solution, the rejection of ZnSO4 and MnSO4 in ZnSO4 and MnSO4 solution could reach 93%. Moreover, the prepared internally pressurized HFNF membrane showed good anti-fouling performance and chlorine resistance performance.

基金项目：

山东省重点研发计划项目（No. 2019GGX102040）

作者简介：

刘少校（1997-），男，山东青岛人，硕士研究生，研究方向：中空纤维纳滤膜分离技术E-mail:lsx158799@foxmail.com

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