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A robust dually charged membrane prepared via catechol-amine chemistry for highly efficient dye/salt separation
Cao, Yang1,2; Zhang, Huiru1,2; Guo, Shiwei1,2; Luo, Jianquan1,2; Wan, Yinhua1,2
2021-07-01
Source PublicationJOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
Volume629Pages:11
Abstract

Novel nanoporous membranes with superior permeability and exceptional molecular selectivity are highly desirable for wastewater treatment and reclamation. Herein, a 3D dual-charged multilayer membrane for efficient separation of dyes/salts is fabricated via catechol-amine chemistry surface engineering. Polyethyleneimine (PEI) is firstly coated on the hydrolyzed polyacrylonitrile substrate to construct a positively charged intermediate layer, followed by codeposition of tannic acid (TA) and poly-?-glutamic acid (?-PGA) to engineer a negatively charged top layer. During the polyphenol-induced competitive reaction processes, covalent interactions, hydrogen bonding and electrostatic adsorption among TA, ?-PGA and PEI hinder the rapid and uneven selfpolymerization of TA, thus loosening the separation layer structure. In addition, the pre-reaction between TA and ?-PGA can weaken those competitive reactions, further tuning the pore size and dual charge layer thus improving the separation performance. Benefited from the novel loose dual-charged structure, the resultant membrane exhibits outstanding water permeability (36.9 Lm- 2h- 1bar- 1) with low salt rejections (11.1% for Na2SO4 and 14.6% for NaCl) and high rejection to both positively and negatively charged dyes. It works well even for rejecting small-molecule dyes (100% congo red, 98% methyl green, 96% methyl orange and 86% methylene blue), far superior to the state-of-the-art membranes. Despite the loose structure, the membrane still possesses excellent acid resistance, and its hydrophilic surface contributes to excellent anti-fouling performance. Such thin-film composite membranes with tunable dual-charged multilayer prepared via this new strategy provides a promising candidate for separation of small charged molecules and inorganic salts, especially in textile industry.

KeywordPolyphenol Mussel-inspired Codeposition Loose Nanofiltration Tight Ultrafiltration Acid Resistant Membrane
DOI10.1016/j.memsci.2021.119287
Language英语
WOS KeywordNanofiltration Membranes ; Waste-water ; Mechanical-properties ; Acid Hydrogels ; Fabrication ; Nanofilms ; Removal
Funding ProjectProvince Key Research and Development Program of Shandong[2019JZZY010348] ; Chinese Academy of Sciences[KFJ-STS-QYZX-096] ; ZheJiang MEY Membrane Technology CO.,LTD.
WOS Research AreaEngineering ; Polymer Science
WOS SubjectEngineering, Chemical ; Polymer Science
Funding OrganizationProvince Key Research and Development Program of Shandong ; Chinese Academy of Sciences ; ZheJiang MEY Membrane Technology CO.,LTD.
WOS IDWOS:000647437700002
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48470
Collection中国科学院过程工程研究所
Corresponding AuthorLuo, Jianquan
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, 1 North 2nd St, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Cao, Yang,Zhang, Huiru,Guo, Shiwei,et al. A robust dually charged membrane prepared via catechol-amine chemistry for highly efficient dye/salt separation[J]. JOURNAL OF MEMBRANE SCIENCE,2021,629:11.
APA Cao, Yang,Zhang, Huiru,Guo, Shiwei,Luo, Jianquan,&Wan, Yinhua.(2021).A robust dually charged membrane prepared via catechol-amine chemistry for highly efficient dye/salt separation.JOURNAL OF MEMBRANE SCIENCE,629,11.
MLA Cao, Yang,et al."A robust dually charged membrane prepared via catechol-amine chemistry for highly efficient dye/salt separation".JOURNAL OF MEMBRANE SCIENCE 629(2021):11.
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