SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (1): 90-97.DOI: 10.1016/j.cjche.2019.03.007

• Separation Science and Engineering • Previous Articles     Next Articles

Water-selective hybrid membranes with improved interfacial compatibility from mussel-inspired dopamine-modified alginate and covalent organic frameworks

Hao Yang1,2, Hong Wu1,2,3, Fusheng Pan1,2,4, Meidi Wang1,2, Zhongyi Jiang1,2, Qifan Cheng1,2, Cheng Huang1,2   

  1. 1 Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China;
    3 Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, China;
    4 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2019-02-14 Revised:2019-03-13 Online:2020-03-31 Published:2020-01-28
  • Contact: Zhongyi Jiang
  • Supported by:
    Supported by the National Natural Science Foundation of China (21621004, 21490583, 21878215, 21878216), the Program of Introducing Talents of Discipline to Universities (B06006) and the State Key Laboratory of Organic-Inorganic Composites (oic-201801003).

Water-selective hybrid membranes with improved interfacial compatibility from mussel-inspired dopamine-modified alginate and covalent organic frameworks

Hao Yang1,2, Hong Wu1,2,3, Fusheng Pan1,2,4, Meidi Wang1,2, Zhongyi Jiang1,2, Qifan Cheng1,2, Cheng Huang1,2   

  1. 1 Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China;
    3 Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, China;
    4 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • 通讯作者: Zhongyi Jiang
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21621004, 21490583, 21878215, 21878216), the Program of Introducing Talents of Discipline to Universities (B06006) and the State Key Laboratory of Organic-Inorganic Composites (oic-201801003).

Abstract: Hybrid membranes combining the merits of both polymer matrices and fillers have drawn extensive attention. The rational design of polymer-filler interface in hybrid membranes is vitally important for reducing the occurrence of void defects. Herein, imine-type covalent organic frameworks (COFs) were selected as the fillers due to their totally organic nature and multi-functionalities. Mussel-inspired dopamine-modified sodium alginate (AlgDA) was synthesized as the polymer matrix. The dopamine modification significantly improves the AlgDA-COF compatibility, which enhances the COF content up to 50 wt% in the hybrid membranes. The improved interfacial compatibility enhances the membrane separation selectivity. Accordingly, when utilized for dehydration of ethanol/water mixed solution (water concentration of 10 wt%), the hybrid membrane reveals high water concentration of ~98.7 wt% in permeate, and stable permeation flux larger than 1500 g·m-2·h-1. This work might afford useful insights for fabricating hybrid membranes with high separation selectivity by optimizing the polymer-filler interface. Keywords:Alginate Dopamine Covalent organic framework Membrane

Key words: Alginate, Dopamine, Covalent organic framework, Membrane, Pervaporation, Interface

摘要: Hybrid membranes combining the merits of both polymer matrices and fillers have drawn extensive attention. The rational design of polymer-filler interface in hybrid membranes is vitally important for reducing the occurrence of void defects. Herein, imine-type covalent organic frameworks (COFs) were selected as the fillers due to their totally organic nature and multi-functionalities. Mussel-inspired dopamine-modified sodium alginate (AlgDA) was synthesized as the polymer matrix. The dopamine modification significantly improves the AlgDA-COF compatibility, which enhances the COF content up to 50 wt% in the hybrid membranes. The improved interfacial compatibility enhances the membrane separation selectivity. Accordingly, when utilized for dehydration of ethanol/water mixed solution (water concentration of 10 wt%), the hybrid membrane reveals high water concentration of ~98.7 wt% in permeate, and stable permeation flux larger than 1500 g·m-2·h-1. This work might afford useful insights for fabricating hybrid membranes with high separation selectivity by optimizing the polymer-filler interface. Keywords:Alginate Dopamine Covalent organic framework Membrane

关键词: Alginate, Dopamine, Covalent organic framework, Membrane, Pervaporation, Interface