SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (10): 2533-2541.DOI: 10.1016/j.cjche.2020.06.029

• Separation Science and Engineering • 上一篇    下一篇

TiO2-incorporated polyelectrolyte composite membrane with transformable hydrophilicity/hydrophobicity for nanofiltration separation

Yahua Lu1, Zhenping Qin1, Naixin Wang1, Hongxia Guo2, Quanfu An1, Yucang Liang3   

  1. 1 Beijing Key Laboratory for Green Catalysis and Separation, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;
    2 College of Materials Science and Engineering, Beijing University of Technology, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing 100124, China;
    3 Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
  • 收稿日期:2019-12-11 修回日期:2020-06-12 出版日期:2020-10-28 发布日期:2020-12-03
  • 通讯作者: Hongxia Guo, Yucang Liang
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (21476005, 21878003) as well as the National Natural Science Fund for Innovative Research Groups (51621003).

TiO2-incorporated polyelectrolyte composite membrane with transformable hydrophilicity/hydrophobicity for nanofiltration separation

Yahua Lu1, Zhenping Qin1, Naixin Wang1, Hongxia Guo2, Quanfu An1, Yucang Liang3   

  1. 1 Beijing Key Laboratory for Green Catalysis and Separation, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;
    2 College of Materials Science and Engineering, Beijing University of Technology, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing 100124, China;
    3 Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
  • Received:2019-12-11 Revised:2020-06-12 Online:2020-10-28 Published:2020-12-03
  • Contact: Hongxia Guo, Yucang Liang
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (21476005, 21878003) as well as the National Natural Science Fund for Innovative Research Groups (51621003).

摘要: The wettability of the membrane surface has shown obvious influent on the separation performance of the membrane. In this work, a hydrophilic PDA-[PDDA/TiO2]+Cl- membrane was prepared by a one-step codeposition of poly(diallyldimethylammonium chloride) (PDDA) polyelectrolyte solution containing positively charged TiO2@ PDDA nanoparticles with the assistance of dopamine (DA). Such positively charged membrane can be transformed into a hydrophobic membrane PDA-[PDDA/TiO2]+PFO- via the counterion exchange between Cl- and PFO- (perfluorooctanoate). The transformation between hydrophilicity and hydrophobicity is reversible. For both hydrophilic and hydrophobic membranes, the nanofiltration performances were respectively investigated by the aqueous solution and ethanol solution of dyes including methyl blue (MB), Congo red (CR) and Evans blue (EB), and as well metal salt aqueous solution. The consecutive running stability and anti-fouling performance of both hydrophilic and hydrophobic membranes were explored. The results revealed that both membranes showed high nanofiltration performances for retention of dyes in (non)aqueous solution. For the hydrophilic membrane, the rejection of salts in a sequence is MgSO4 > Na2SO4 > MgCl2 > NaCl. Moreover, both

关键词: Counterion exchange, Wettability, Reversibility, Dopamine, TiO2-incorporated polyelectrolyte composite, membrane, (non)aqueous nanofiltration

Abstract: The wettability of the membrane surface has shown obvious influent on the separation performance of the membrane. In this work, a hydrophilic PDA-[PDDA/TiO2]+Cl- membrane was prepared by a one-step codeposition of poly(diallyldimethylammonium chloride) (PDDA) polyelectrolyte solution containing positively charged TiO2@ PDDA nanoparticles with the assistance of dopamine (DA). Such positively charged membrane can be transformed into a hydrophobic membrane PDA-[PDDA/TiO2]+PFO- via the counterion exchange between Cl- and PFO- (perfluorooctanoate). The transformation between hydrophilicity and hydrophobicity is reversible. For both hydrophilic and hydrophobic membranes, the nanofiltration performances were respectively investigated by the aqueous solution and ethanol solution of dyes including methyl blue (MB), Congo red (CR) and Evans blue (EB), and as well metal salt aqueous solution. The consecutive running stability and anti-fouling performance of both hydrophilic and hydrophobic membranes were explored. The results revealed that both membranes showed high nanofiltration performances for retention of dyes in (non)aqueous solution. For the hydrophilic membrane, the rejection of salts in a sequence is MgSO4 > Na2SO4 > MgCl2 > NaCl. Moreover, both

Key words: Counterion exchange, Wettability, Reversibility, Dopamine, TiO2-incorporated polyelectrolyte composite, membrane, (non)aqueous nanofiltration