Manipulating interfacial polymerization for polymeric nanofilms of composite separation membranes

Wang, Zhuyuan; Liang, Songmiao; Kang, Yuan; Wang, Zhao; Xia, Yun; Yang, Jindi; Wang, Huanting; Zhang, Xiwang

doi:10.1016/j.progpolymsci.2021.101450

Cited by 128 publications

(49 citation statements)

References 281 publications

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“…The thin films picked on Si wafer, and showed uniform surface with linear and circular wrinkles in film ( Figures 1 and S3–S6 ). The linear and circular wrinkles (crumpled morphology) are clearly observed on the polyaryl nanofilm, which does not collapse even after drying [ Wang et al., 2021 ]. This development of crumpled morphology plays key role in enhancing active surface area for high permeance.…”

Section: Resultsmentioning

confidence: 99%

“…It also suggested that controlling the monomer diffusion in diffusion-driven IP leads to the thin and low cross-linked polymeric film. Overall, a combination of different parameters like free volume, hydrophilicity, and low cross-linking density certainly affects the pore aperture and pore size distribution and kinetics affects the thickness [ Wang et al., 2021 ], if addressed will serve major gains in wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

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Perm-selective ultrathin high flux microporous polyaryl nanofilm for molecular separation

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Perm-selective ultrathin high flux microporous polyaryl nanofilm for molecular separation

et al. 2022

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“…For instance, polyethylene (PE), polypropylene (PP), and polytetrafluoroethylene (PTFE) owe excellent mechanical strength and chemical stability as membrane materials, but the nonpolar surface makes them prone to fouling . On the other hand, the emergence of composite membranes brings not only the hope to meet the growing demands of high-performance and multifunctional membranes but also a big challenge in membrane surface modification. , To investigate and address these issues systematically, our group proposed the concept of the surface engineering of polymer membrane about 20 years ago …”

Section: Introductionmentioning

confidence: 99%

Surface and Interface Engineering of Polymer Membranes: Where We Are and Where to Go

et al. 2022

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Surface and interface engineering provides a powerful tool to tailor the structures and properties of polymer membranes, sharpening their applications in sustainable development. Tremendous progress has been achieved in this field over the past 20 years. In this Perspective, we overview the conventional and emerging strategies for membrane surface engineering and present the current trends in surface and interface engineering for both porous and thin-film composite membranes. For porous membranes, the rise of Janus membranes motivates the evolution from uniform functionalization to asymmetric performance construction. For thin-film composite membranes, the research foci are moving to the surface modification of substrates, the fabrication of nanostructured interlayers, and especially the regulation of interfacial polymerization.

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“…A thin active layer on an IEM is also used to increase the specific selectivity of ion transport across a composite membrane with respect to singly charged ions [28][29][30] or with respect to nitrates as compared to chlorides [31]. The mechanisms of the modifying layer formation in the process of multilayer membranes manufacturing, as well as the reasons for the selectivity of these membranes to individual ions are considered in Refs.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Description of the Increase in Selectivity of an Anion-Exchange Membrane Due to Its Modification with a Perfluorosulfonated Ionomer

Kozmai

Pismenskaya

Nikonenko

2022

IJMS

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In this paper, we simulate the changes in the structure and transport properties of an anion-exchange membrane (CJMA-7, Hefei Chemjoy Polymer Materials Co. Ltd., China) caused by its modification with a perfluorosulfonated ionomer (PFSI). The modification was made in several stages and included keeping the membrane at a low temperature, applying a PFSI solution on its surface, and, subsequently, drying it at an elevated temperature. We applied the known microheterogeneous model with some new amendments to simulate each stage of the membrane modification. It has been shown that the PFSI film formed on the membrane-substrate does not affect significantly its properties due to the small thickness of the film (»4 µm) and similar properties of the film and substrate. The main effect is caused by the fact that PFSI material “clogs” the macropores of the CJMA-7 membrane, thereby, blocking the transport of coions through the membrane. In this case, the membrane microporous gel phase, which exhibits a high selectivity to counterions, remains the primary pathway for both counterions and coions. Due to the above modification of the CJMA-7 membrane, the coion (Na+) transport number in the membrane equilibrated with 1 M NaCl solution decreased from 0.11 to 0.03. Thus, the modified membrane became comparable in its transport characteristics with more expensive IEMs available on the market.

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Manipulating interfacial polymerization for polymeric nanofilms of composite separation membranes

Cited by 128 publications

References 281 publications

Perm-selective ultrathin high flux microporous polyaryl nanofilm for molecular separation

Perm-selective ultrathin high flux microporous polyaryl nanofilm for molecular separation

Surface and Interface Engineering of Polymer Membranes: Where We Are and Where to Go

Mathematical Description of the Increase in Selectivity of an Anion-Exchange Membrane Due to Its Modification with a Perfluorosulfonated Ionomer

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