SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (11): 1533-1540.DOI: 10.1016/j.cjche.2016.04.019

• 第25届中国过程控制会议专栏 • 上一篇    下一篇

Novel nanofiltration membranes with tunable permselectivity by polymer mediated phase separation in polyamide selective layer

Zhuan Yi1, Fa-dong Wu2, Yong Zhou1,2, Cong-jie Gao1,2   

  1. 1 Department of Ocean, Zhejiang University of Technology, Hangzhou 310014, China;
    2 Water Treatment Technology Development Center, Hangzhou 310012, China
  • 收稿日期:2016-01-08 修回日期:2016-04-16 出版日期:2016-11-28 发布日期:2016-12-06
  • 通讯作者: Yong Zhou
  • 基金资助:

    Supported by the National Basic Research Programof China (2015CB655303) and the Natural Science Foundation of Zhejiang Province (Q14B040003).

Novel nanofiltration membranes with tunable permselectivity by polymer mediated phase separation in polyamide selective layer

Zhuan Yi1, Fa-dong Wu2, Yong Zhou1,2, Cong-jie Gao1,2   

  1. 1 Department of Ocean, Zhejiang University of Technology, Hangzhou 310014, China;
    2 Water Treatment Technology Development Center, Hangzhou 310012, China
  • Received:2016-01-08 Revised:2016-04-16 Online:2016-11-28 Published:2016-12-06
  • Contact: Yong Zhou
  • Supported by:

    Supported by the National Basic Research Programof China (2015CB655303) and the Natural Science Foundation of Zhejiang Province (Q14B040003).

摘要: Microstructure in selective layer has played a decisive role in permselectivity of nanofiltration (NF) membranes, and nanomaterials were well-known additives that had been applied to mediate the microstructure and permeability of polyamide NF membranes. However, nanoadditives generally displayed a poor dispersion in membranes or in fabrication process. To solve this problem, we showed an interesting concept that novel NF membranes with hybrid selective layer consisting of flexible polyisobutylene (PIB) and rigid polyamide could be fabricated fromwell-defined interfacial polymerization. The hydrophobic polymer mediated phase separation andmicrodomains formation in polyamide layerwere found. The immiscibility between the rigid polyamide and flexible PIB as well as the resultant interface effect was interpreted as the reason for the polymer enhanced permselectivity, which was similar with the well-known thin film nanocomposite (TFN) membranes that nanoparticles incorporated contributed significantly to membrane permeability and rejection performance. Our results have demonstrated that novel NF membranes with enhanced performance can be prepared fromimmiscible polymers, which is a new area that has not been extensively studied before.

关键词: Nanofiltration membranes, Interfacial polymerization, Polymer additive, Hydrophobicity, Fabrication

Abstract: Microstructure in selective layer has played a decisive role in permselectivity of nanofiltration (NF) membranes, and nanomaterials were well-known additives that had been applied to mediate the microstructure and permeability of polyamide NF membranes. However, nanoadditives generally displayed a poor dispersion in membranes or in fabrication process. To solve this problem, we showed an interesting concept that novel NF membranes with hybrid selective layer consisting of flexible polyisobutylene (PIB) and rigid polyamide could be fabricated fromwell-defined interfacial polymerization. The hydrophobic polymer mediated phase separation andmicrodomains formation in polyamide layerwere found. The immiscibility between the rigid polyamide and flexible PIB as well as the resultant interface effect was interpreted as the reason for the polymer enhanced permselectivity, which was similar with the well-known thin film nanocomposite (TFN) membranes that nanoparticles incorporated contributed significantly to membrane permeability and rejection performance. Our results have demonstrated that novel NF membranes with enhanced performance can be prepared fromimmiscible polymers, which is a new area that has not been extensively studied before.

Key words: Nanofiltration membranes, Interfacial polymerization, Polymer additive, Hydrophobicity, Fabrication