Page 95 - 《精细化工》2021年第10期

第 38 卷第 10 期 精 细 化 工 Vol.38, No.10
2021 年 10 月 FINE CHEMICALS Oct. 2021

功能材料
PA/ZIF-8/PVDF 复合纳滤膜的制备及其性能

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韩长秀 1,2 ，杨丹培 ，王海涛 1,2 ，常 娜 1,3*
（1. 省部共建分离膜与膜过程国家重点实验室，天津 300387；2. 天津工业大学 环境科学与工程学院，
天津 300387；3. 天津工业大学 化学工程与技术学院，天津 300387）

摘要：采用反向扩散法在聚偏氟乙烯（PVDF）基膜表面原位生长一层均匀、致密的金属有机骨架材料 ZIF-8 纳
米晶体层，并进一步优化界面聚合反应，制备高性能聚酰胺（PA）/ZIF-8/PVDF 复合纳滤膜。采用 SEM、XRD、
FTIR、AFM、XPS、水接触角测定仪以及固体表面 Zeta 电位仪对 ZIF-8/PVDF 复合膜及 PA/ZIF-8/PVDF 复合纳
滤膜的组成、结构和形貌进行了表征，考察了 ZIF-8 亚层的生长对界面聚合反应、复合纳滤膜结构及性能的影
响。结果表明，ZIF-8 晶体亚层在 PVDF 膜表面的均匀连续生长改善了 PA 分离层与 PVDF 基膜的界面相容性，提
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高复合纳滤膜 PA 分离层的交联度。在 0.6 MPa 下，复合纳滤膜纯水通量可达 24.05 L/(m ·h)，对 MgSO 4 、Na 2 SO 4 、
NaCl 和 MgCl 2 4 种盐的截留率分别达到 97.34%、93.57%、89.31%和 85.16%，具有优异的抗污染性能。
关键词：膜；ZIF-8；界面聚合；纳滤；脱盐；抗污染；功能材料
中图分类号：X703.1；TB34 文献标识码：A
文章编号：1003-5214 (2021) 10-2025-09 开放科学 (资源服务) 标识码 (OSID)：

Preparation and properties of PA/ZIF-8/PVDF
composite nanofiltration membranes

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1,2
HAN Changxiu , YANG Danpei , WANG Haitao , CHANG Na 1,3*
（1. State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China; 2. School of
Environmental Science and Engineering, Tiangong University, Tianjin 300387, China; 3. School of Chemical Engineering
and Technology, Tiangong University, Tianjin 300387, China）
Abstract: Uniform and dense zeolitic imidazole framework-8 (ZIF-8) sub-layer was fabricated on the surface
of polyvinylidene fluoride (PVDF) membrane via an in situ contra-diffusion method, and then polyamide/
ZIF-8/PVDF composite nanofiltration membranes with polyamide (PA) top thin layers and ZIF-8 sub-
layers were obtained through interfacial polymerization. The chemical composition, structure and morphology
of ZIF-8/PVDF composite membranes and PA/ZIF-8/PVDF composite nanofiltration membranes were
characterized by SEM, XRD, FTIR, AFM, XPS, contact angle analyzer and solid surface Zeta potentiometer.
The effect of ZIF-8 sub-layer on the structure and performance of these composite nanofiltration membranes
were investigated. The results indicated that uniform and continuous growth of ZIF-8 sub-layer on the
PVDF membrane surface could be achieved. The existence of ZIF-8 sub-layer increased the interfacial
compatibility between PA separation layer and PVDF substrate membrane and the cross-linking degree of
the composite nanofiltration membrane PA separation layer. At 0.6 MPa, the composite nanofiltration
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membrane had high pure water flux of 24.05 L/(m ·h) and exhibited good anti-fouling property. Moreover,
the composite NF membrane showed excellent desalination performance, with the rejection rate of 97.34%,
93.57%, 89.31% and 85.16% for MgSO 4, Na 2SO 4, NaCl and MgCl 2, respectively.
Key words: membranes; ZIF-8; interfacial polymerization; nanofiltration; desalination; anti-fouling;
functional materials

收稿日期：2021-05-31; 定用日期：2021-06-15; DOI: 10.13550/j.jxhg.20210545
基金项目：国家重点研发计划（2019YFC0408401，2019YFC0408404）；天津市重点研发计划（19YFZCSF01110）；京津冀三地联合攻
关项目（19YFSLQY00060）
作者简介：韩长秀（1970—），女，副教授。联系人：常 娜（1984—），女，教授，E-mail：changna@tiangong.edu.cn。