Surface Modification of Ion Exchange Membranes

A special issue of Membranes (ISSN 2077-0375).

Deadline for manuscript submissions: closed (25 December 2023) | Viewed by 2943

Special Issue Editor


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Guest Editor
Department of Physical Chemistry, Kuban State University, 149 Stavropolskaya st., Krasnodar 350040, Russia
Interests: ion exchange membrane; electrodialysis; membrane modification; surface phenomena; selective separation

Special Issue Information

Dear Colleagues,

Recent developments in membrane developments demonstrated the benefits of layer-by-layer coating for improvement of monovalent selectivity, of plasma treatment for increase in ionic flux, and of grafting and ion implantation for mitigation of fouling. It is shown that the surface modification of ion exchange membranes by chemical reactions, coating, plasma treatment, electrospinning, and other methods is a versatile and powerful tool for improvement of membrane properties and its tailoring for the needs of the specific membrane technologies. I am pleased to invite you to contribute to this Special Issue focusing on the surface modification of ion exchange membranes. This Special Issue aims to provide examples of surface modification of ion exchange membranes that have led to the improvement of some parameters of membrane processes, such as increase in mass transport, improvement of selectivity, or resistance to fouling. In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: novel surface-modified ion exchange membranes and their characterization, novel techniques of surface modification of ion exchange membranes and comparison of the results achieved with different techniques or conditions of modification, stability of modification, and application of modified membranes. I look forward to receiving your contributions.

Dr. Ksenia Kirichenko
Guest Editor

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Keywords

  • ion exchange membrane
  • surface modification
  • membrane application
  • membrane fouling
  • process intensification
  • water treatment

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Published Papers (1 paper)

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Research

20 pages, 8184 KiB  
Article
Surface-Modified Pore-Filled Anion-Exchange Membranes for Efficient Energy Harvesting via Reverse Electrodialysis
by Ji-Hyeon Lee, Do-Hyeong Kim and Moon-Sung Kang
Membranes 2023, 13(12), 894; https://doi.org/10.3390/membranes13120894 - 30 Nov 2023
Cited by 3 | Viewed by 2462
Abstract
In this study, novel pore-filled anion-exchange membranes (PFAEMs) modified with polypyrrole (PPy) and reduced graphene oxide (rGO) were developed to improve the energy harvesting performance of reverse electrodialysis (RED). The surface-modified PFAEMs were fabricated by varying the contents of PPy and rGO through [...] Read more.
In this study, novel pore-filled anion-exchange membranes (PFAEMs) modified with polypyrrole (PPy) and reduced graphene oxide (rGO) were developed to improve the energy harvesting performance of reverse electrodialysis (RED). The surface-modified PFAEMs were fabricated by varying the contents of PPy and rGO through simple spin coating and chemical/thermal treatments. It was confirmed that the PPy and PPy/rGO layers introduced on the membrane surface did not significantly increase the electrical resistance of the membrane and could effectively control surface characteristics, such as structural tightness, hydrophilicity, and electrostatic repulsion. The PPy/rGO-modified PFAEM showed excellent monovalent ion selectivity, more than four times higher than that of the commercial membrane (AMX, Astom Corp., Tokyo, Japan). This means that the PPy/rGO layer can effectively reduce the permeation of multivalent ions with a high charge intensity and a relatively large hydration radius compared to monovalent ions. The results of evaluating the performance of the surface-modified PFAEMs by applying them to a RED cell revealed that the decrease in potential difference occurring in the membrane was reduced by effectively suppressing the uphill transport of multivalent ions. Consequently, the PPy/rGO-modified membrane exhibited a 5.43% higher power density than the AMX membrane. Full article
(This article belongs to the Special Issue Surface Modification of Ion Exchange Membranes)
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