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AuthorWang, Tunyu
AuthorQiblawey, Hazim
AuthorSivaniah, Easan
AuthorMohammadian, Abdolmajid
Available date2021-09-01T10:02:41Z
Publication Date2016
Publication NameJournal of Membrane Science
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.memsci.2016.03.043
URIhttp://hdl.handle.net/10576/22352
AbstractNovel methodology for facilely fabricating nanofiltration (NF) composite membrane has been successfully developed by employing nucleophilic nature of polydopamine (PDA) chemistry. The self-polymerized PDA coating over polysulfone (PSf) substrate was utilized as a key intermediate layer for trimesoyl chloride (TMC) grafting followed by poly(ethyleneimine) (PEI) deposition to construct the hierarchically structured separation layer of NF membrane. In contrast to the electrophilic quinone moieties of PDA layer usually involved in the Michael addition and Schiff base reactions with polymeric amines for membrane preparation in previous reports, the phenolic hydroxyl groups of catechol moieties as well as amine groups at the PDA layer possess nucleophilic nature, which are capable of quickly coupling with the highly reactive acyl chlorides to form ester and amide bonds in the step of TMC grafting, resulting in TMC moieties covalently anchored at the PDA layer with free acyl chloride groups. Such created acyl chlorides are further coupled with the amine groups of branched PEI polymer in the PEI deposition procedure to form the stable amide bonds linking the PDA base layer and PEI upper layer in the resulting hierarchical separation layer. The properties of membranes prepared at different stages were characterized with respect to surface chemistry, pore properties, and separation performances to understand deeply the newly developed methodology for membrane preparation. Further studies focusing on NF properties and stability of the developed NF membrane revealed that such membrane shows high efficiencies in retention of divalent cations, small organic molecules as well as heavy metal ions, and exhibits desirable thermal stability and long-term performance stability. 2016 Elsevier B.V.
SponsorThis work is supported by Grant from the Qatar National Research Fund (QNRF) under its National Priorities Research Program (NPRP) award number NPRP 4-935-2-354 . The statements made herein are solely the responsibility of the authors. We acknowledge Gas Processing Center (GPC, Qatar University) for XPS measurements and Center of Advanced Materials (CAM, Qatar University) for AFM measurements.
Languageen
PublisherElsevier B.V.
SubjectAddition reactions
Amides
Chlorine compounds
Composite membranes
Deposition
Grafting (chemical)
Heavy metals
Membranes
Metal ions
Metals
Nanofiltration
Polymers
Separation
Surface chemistry
Long term performance
Phenolic hydroxyl group
Polydopamine
Polyethyleneimine
Schiff base reaction
Separation performance
Small organic molecules
Trimesoyl chloride
Nanofiltration membranes
catechol
chloride
phenol
polydopamine
polyethyleneimine
polymer
polysulfone
Schiff base
trimesoyl chloride
unclassified drug
Article
covalent bond
electric conductivity
electrophilicity
hydrodynamics
hydrophilicity
membrane
Michael addition
nanofabrication
nanofiltration
nanofiltration membrane
nucleophilicity
priority journal
surface property
thermostability
water permeability
TitleNovel methodology for facile fabrication of nanofiltration membranes based on nucleophilic nature of polydopamine
TypeArticle
Pagination65-75
Volume Number511
dc.accessType Abstract Only


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