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2025 Vol.35, Issue 7 Preview Page

Research Paper

Fabrication and Evaluation of Multilayer Pore-Filling Cation Exchange Membrane for Suppressing Property Degradation by Multivalent Ions

다가이온에 의한 특성 열화를 줄이기 위한 다층구조 세공충진 이온교환막의 제막 및 특성 평가

Woohyun Choi1*
,
Yeongseo Kim1*
,
Jeong Geun Park1
,
Min-Gyu Kim1
,
Yeon-Gil Jung12
,
Hae-Kwon Jeong3
,
SeungCheol Yang12†
최 우현1*
,
김 영서1*
,
박 정근1
,
김 민규1
,
정 연길12
,
정 해권3
,
양 승철12†
1Department of Materials Convergence and System Engineering, Changwon National University, Changwon 51140, Republic of Korea
2School of Materials Science and Engineering, Changwon National University, Changwon 51140, Republic of Korea
3Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
1국립창원대학교 소재융합시스템공학과
2국립창원대학교 신소재공학부
3텍사스 A&M 대학교 화학공학과
†Corresponding author E-Mail : pure5258@changwon.ac.kr (S. Yang, Changwon Nat’l Univ.)
*These two authors are equally contributed as first authors.
27 July 2025. pp. 318-327
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Abstract

Multivalent ions in natural aqueous solutions—such as seawater, brackish water, and freshwater—can negatively affect the performance of ion exchange membranes (IEMs) used in electrochemical energy and environmental devices. In this study, a pore-filling cation exchange membrane (CEM) permeable to multivalent ions was fabricated to minimize performance degradation caused by such ions. To achieve this, multilayer pore-filling CEMs were prepared by performing two impregnation processes using monomer electrolyte solutions of different compositions (varying deionized water content and monomer-to-crosslinker ratios). As a result, a highly crosslinked electrolyte polymer formed on the internal side of the CEM, while a low-crosslinked polymer formed on the external side. Due to the presence of the low-crosslinked outer polymer layer, the multilayer pore-filling CEM exhibited a smaller increase in resistance caused by Mg2+ ions. Furthermore, based on the correlation between permselectivity and resistance measured in a 0.45 M NaCl + 0.05 M MgCl2 solution, which simulated the Mg2+ concentration in seawater, an optimal structure of multilayer pore-filling CEM was identified, and it exhibited a minimized increase in resistance and a permselectivity of over 90 %.

Keywords
ion exchange membrane
pore filling
cation
multilayer
multivalent ions
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 35
  • No :7
  • Pages :318-327
  • Received Date : 2025-06-29
  • Revised Date : 2025-07-16
  • Accepted Date : 2025-07-16
  • DOI :https://doi.org/10.3740/MRSK.2025.35.7.318
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