高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (4): 20220574.doi: 10.7503/cjcu20220574

• 高分子化学 • 上一篇    下一篇

以聚偏氟乙烯为基底的高渗透选择性聚酰胺/酯纳滤膜的制备与表征

杨炎福1,2, 王齐齐1,2, 张辉1,2, 张庆磊3, 赵军强1,2(), 赵义平1,2, 陈莉1,2   

  1. 1.天津工业大学材料科学与工程学院, ,
    2. 省部共建分离膜与膜过程 国家重点实验室, 天津 300387
    3.北京碧水源膜科技有限公司, 北京 101400
  • 收稿日期:2022-08-29 出版日期:2023-04-10 发布日期:2022-11-10
  • 通讯作者: 赵军强 E-mail:zhaojunqiang@tiangong.edu.cn
  • 基金资助:
    天津工业大学纤维培育基金(TGF-21-B2)

Preparation and Characterization of a High Perm-selectivity Poly(amide/ester) Nanofiltration Membrane Using a Poly(vinylidene fluoride) Substrate

YANG Yanfu1,2, WANG Qiqi1,2, ZHANG Hui1,2, ZHANG Qinglei3, ZHAO Junqiang1,2(), ZHAO Yiping1,2, CHEN Li1,2   

  1. 1.School of Materials Science and Engineering
    2.State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China
    3.Beijing Origin Water Membrane Technology Co. ,Ltd. ,Beijing 101400,China
  • Received:2022-08-29 Online:2023-04-10 Published:2022-11-10
  • Contact: ZHAO Junqiang E-mail:zhaojunqiang@tiangong.edu.cn
  • Supported by:
    the Tiangong University Grant for Fiber Studies, China(TGF-21-B2)

摘要:

以亲水性聚(N-羟乙基丙烯酰胺)(PHEAA)、 疏水性聚甲基丙烯酸甲酯(PMMA)为链段的两亲性三嵌段共聚物PHEAA-b-PMMA-b-PHEAA(PHMH)为改性剂, 以聚偏氟乙烯(PVDF)为基底膜材料, 利用非溶剂诱导相分离法制备了PVDF/PHMH基底. 与未改性PVDF基底相比, PVDF/PHMH基底表面孔径变小, 孔隙率和亲水性增加; 与PVDF基底纳滤膜N0相比, 通过界面聚合制备的PVDF/PHMH基底纳滤膜N1表面粗糙度大、 亲水性强、 截留分子量小, N1纳滤膜对Na2SO4的截留率为96.0%, 水渗透通量高达304 L·m-2·h-1·MPa-1, 优于商业化纳滤膜的渗透选择性.

关键词: 两亲性嵌段共聚物, 聚偏氟乙烯基底, 界面聚合, 纳滤膜, 渗透选择性

Abstract:

Using polyvinylidene fluoride(PVDF) as a substrate material, an amphiphilic triblock copolymer PHEAA-b-PMMA-b-PHEAA(PHMH) with hydrophilic poly(N-hydroxyethyl acrylamide)(PHEAA) and hydrophobic polymethyl methacrylate(PMMA) chain segments was used as a modifier for fabrication of PVDF/PHMH substrate via non-solvent induced phase separation method. The surface pore size of the PVDF/PHMH substrate was smaller than that of the unmodified PVDF substrate, and the porosity and hydrophilicity were increased. Compared with PVDF substrate nanofiltration membrane(N0), PVDF/PHMH substrate nanofiltration membrane(N1) prepared via interfacial polymerization exhibited a higher surface roughness, hydrophilicity and lower molecular weight cut-off. The N1 membrane showed a rejection of Na2SO4 up to 96.0% and the water permeation flux was 304 L·m-2·h-1·MPa-1, which exceeded those of commercial nanofiltration membranes.

Key words: Amphiphilic block copolymer, Poly(vinylidene fluoride) substrate, Interfacial polymerization, Nanofiltration membrane, Perm-selectivity

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