Preparation of thin film composite nanofiltration membrane with improved structural stability through the mediation of polydopamine

Li, Yafei; Su, Yanlei; Li, Jianyu; Zhao, Xueting; Zhang, Runnan; Fan, Xiaochen; Zhu, Junao; Ma, Yanyan; Liu, Yuan; Jiang, Zhongyi

doi:10.1016/j.memsci.2014.11.011

Cited by 212 publications

(89 citation statements)

References 61 publications

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“…Similar work has also been reported by Ingole et al that PDA was used as the interface layer in TFC pressure retarded osmosis membranes for energy generation [149]. By means of the reaction between PDA and hyperbranched PEI, both Gao's and Jiang's group successfully fabricated a PEI-grafted TFC membrane via a PDA intermediate layer [150,151]. PEI is an amino-rich polymer, and thus the cross-linking reaction occurs between catechol and amino groups.…”

Section: Interface Layer For Thin Film Composite Membranesupporting

confidence: 69%

Surface engineering of polymer membranes via mussel-inspired chemistry

Yang

Luo

et al. 2015

Journal of Membrane Science

382

202

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Section: Interface Layer For Thin Film Composite Membranesupporting

confidence: 69%

Surface engineering of polymer membranes via mussel-inspired chemistry

Yang

Luo

et al. 2015

Journal of Membrane Science

382

202

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“…As the concentration of PIP further enhanced, the PWP decreased gradually. The interpretation of this phenomenon is probably that thickness of composite layer increased and structure of composite layer became denser [40,41]. The variation tendency of salts rejection corresponding to the increasing of PIP concentration is similar to related reports [41,42].…”

Section: Separation Performance Of the Anf Membranessupporting

confidence: 85%

“…The interpretation of this phenomenon is probably that thickness of composite layer increased and structure of composite layer became denser [40,41]. The variation tendency of salts rejection corresponding to the increasing of PIP concentration is similar to related reports [41,42]. Nevertheless, the salt rejection of the all ANF membranes corresponding to different types of feed solutions is MgCl 2 EMgSO 4 4Na 2 SO 4 4NaCl, which is similar to a positively charged NF membrane.…”

Section: Separation Performance Of the Anf Membranessupporting

confidence: 78%

Nanofiltration membranes with dually charged composite layer exhibiting super-high multivalent-salt rejection

Liu

Wang

et al. 2016

Journal of Membrane Science

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a b s t r a c tState-of-the-art nanofiltration (NF) membranes generally positively or negatively charged could not remove both multivalent cations and anions once and for all according to the Donnan Exclusion. Designing NF membranes with facile approach for effective removal of multivalent-salt without compromising the permeation is still a tough challenge. In this work, we demonstrate a sort of novel NF membrane consists of a positively charged interlayer sandwiched between substrate and negatively charged outermost surface. The restructured NF membranes with dually charged composite layer were fabricated via amination-interfacial polymerization (A-IP) on poly (vinyl chloride) (PVC) substrate. The resultant NF membranes exhibited super high salts rejection of up to 99.0% MgCl 2 , 99.0% MgSO 4 , 98.5% CaCl 2 , 95.7% Pb(NO 3 ) 2 , and 96.0% Na 2 SO 4 . Additionally, reasonably high flux (8.7 L m À 2 h À 1 bar À 1 , (pure water permeability (PWP))) approaching those of commercial NF membranes was obtained due to the relatively loose structure of the composite layer. Furthermore, the transport and separation mechanism of the restructured NF membranes reveals that the significant upgraded separation performance could be attributed to the synergistic effect of the dually charged layer. Moreover, the dually charged composite layer shown none unfavorable interaction and the resultant NF membranes possessed good interfacial stability.

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“…Employing higher monomer concentration could produce higher molecular weight polymer and a thicker film [8]. Li et al [27] further elucidated that a higher PIP and TMC concentration tended to generate a thicker and more compact PA layer that could affect water flux due to increased transport resistance. For the case of PA layer incorporated with nanofillers, thicker surface layer might reduce extent of nanotubes exposure to top PA surface (reduced hydrophilicity) and/or cover the narrow channels of TNTs.…”

Section: Commented [Srg8]mentioning

confidence: 99%

A practical approach to synthesize polyamide thin film nanocomposite (TFN) membranes with improved separation properties for water/wastewater treatment

et al. 2016

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Thin film nanocomposite (TFN) membranes containing 0.05 or 0.10 w/v% functionalized titanate nanotubes (TNTs) in polyamide selective layer were prepared via interfacial polymerization of piperazine (PIP) and trimesoyl chloride (TMC) monomers. Nanomaterials were dispersed into the monomer solution using two different approaches. In the first one, the functionalized TNTs were dispersed into the amine aqueous solution, while in the second approach the same nanomaterials were dispersed in TMC organic solution. The TFN membranes were characterized and compared with a control thin film composite (TFC) membrane to investigate the effect of nanofiller loadings and the fabrication approach on membrane properties. Results showed that introducing nanofillers into the organic phase was more effective to synthesize a TFN membrane of greater separation performance as the use of rubber roller to remove aqueous solution from the substrate surface could cause the loss of a significant amount of nanofillers, which further affected the polyamide layer integrity. It was also found that incorporation of high nanofiller loading tended to interfere with interfacial polymerization and weaken the bonds between monomers blocks, resulting in poor polyamide-nanotubes integrity. Compared to the TFC membrane, the TFN membrane made of 2% PIP and 0.15% TMC with 0.5% nanofiller incorporation could achieve greater water flux (7.5 vs 5.4 L/m 2 .h.bar) and Na2SO4 rejection (96.4% vs 86%) while exhibiting higher resistance against the fouling by protein and dye.

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Preparation of thin film composite nanofiltration membrane with improved structural stability through the mediation of polydopamine

Cited by 212 publications

References 61 publications

Surface engineering of polymer membranes via mussel-inspired chemistry

Surface engineering of polymer membranes via mussel-inspired chemistry

Nanofiltration membranes with dually charged composite layer exhibiting super-high multivalent-salt rejection

A practical approach to synthesize polyamide thin film nanocomposite (TFN) membranes with improved separation properties for water/wastewater treatment

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