Surface Modification of Anion Exchange Membrane by Covalent Grafting for Imparting Permselectivity between Specific Anions

Wang, Xunliang; Wang, Meng; Jia, Yonggang; Wang, Beibei

doi:10.1016/j.electacta.2015.06.115

Cited by 59 publications

(27 citation statements)

References 29 publications

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“…Therefore, highly efficient monovalent anion selective membranes are required to restrict the transport of multivalent anions and promote the migration of monovalent ions through the membrane structure. [8][9][10][11][12] In order to achieve an enhanced membrane performance, many research efforts have been devoted to investigating the mechanism for preparing high performance monovalent selective anion exchange membranes. The mechanism of these studies is principally focused on the difference of hydrated ionic radius and valence, based on the sieving and electrostatic repulsion, respectively.…”

Section: Introductionmentioning

confidence: 99%

A novel nanofiltration membrane inspired by an asymmetric porous membrane for selective fractionation of monovalent anions in electrodialysis

et al. 2018

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Section: Introductionmentioning

confidence: 99%

A novel nanofiltration membrane inspired by an asymmetric porous membrane for selective fractionation of monovalent anions in electrodialysis

et al. 2018

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“…These effects improve selectivity for specific anions with different hydration shells. It also prevents fouling or biofouling …”

Section: Introductionmentioning

confidence: 99%

Study of effect of two sulfonating agents on electrochemical properties of surface‐modified polyethersulfone membrane

Zárybnická

Stránská

2019

J of Applied Polymer Sci

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The work deals with the selection of sulfonating agent and preparation of polymeric coating on membrane step by step. The surface modification of a commercial ultrafiltration polyethersulfone (PES) membrane was covalently attached to the poly(styrene‐co‐divinylbenzene‐co‐4‐vinylbenzylchloride). The whole process was tracked step by step using analytical methods. Chlorosulfonic acid and trimethylsilyl chlorosulfonate were tested as sulfonating agents. Ion‐exchange capacity (IEC), water content, specific resistance, and permselectivity were measured and scanning electron microscope analyzed the surface of the cation exchange membrane. The best results were achieved using 5 wt % chlorosulfonic acid as sulfonating agent. IEC reached values of up to 2.44 meq g−1 of dry matter, permselectivity of 93.6%, area resistances of 10.1 Ω cm2, and specific resistance around 299 Ω cm. The prepared cation exchange PES membrane with chlorosulfonic acid can be used in electrochemical processes, for example, in electrodialysis. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48826.

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“…They exhibited excellent initial monovalent cation selectivity in ED, but the selectivity dropped fast with time. To overcome this issue, increasing attention has been paid to introducing robust covalent bonds between the active layer and the substrate membrane . However, in most covalent modification procedures, a complex process control is usually required, which greatly restricts its further application.…”

Section: Introductionmentioning

confidence: 99%

Surface layer modification of AEMs by infiltration and photo‐cross‐linking to induce monovalent selectivity

et al. 2017

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Surface modification of anion exchange membranes (AEMs) by attaching a negatively charged layer is the main method for preparing monovalent anion selective membranes. However, tremendous increase of membrane resistance and poor long‐term stability of the modified membranes face great challenges. In this work, a photosensitive molecule (4,4‐diazostilbene‐2,2‐disulfonic acid disodium salt [DAS]) was infiltrated into the membrane surface and immobilized in the structure by cross‐linking under UV irradiation. This method introduced negative charge to the surface layer of the AEMs without increasing membrane thickness, leading to high performance membrane with high monovalent anion selectivity. The optimized membrane (D‐5) shows the highest perm‐selectivity of 11.21, which is superior to the commercial selective membrane Selemion® ASV and previously reported monovalent anion selective AEMs. Furthermore, the newly developed membrane exhibits excellent long‐term stability, which can maintain constant selectivity during the 80 h ED experiment. © 2017 American Institute of Chemical Engineers AIChE J, 64: 993–1000, 2018

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Surface Modification of Anion Exchange Membrane by Covalent Grafting for Imparting Permselectivity between Specific Anions

Cited by 59 publications

References 29 publications

A novel nanofiltration membrane inspired by an asymmetric porous membrane for selective fractionation of monovalent anions in electrodialysis

A novel nanofiltration membrane inspired by an asymmetric porous membrane for selective fractionation of monovalent anions in electrodialysis

Study of effect of two sulfonating agents on electrochemical properties of surface‐modified polyethersulfone membrane

Surface layer modification of AEMs by infiltration and photo‐cross‐linking to induce monovalent selectivity

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