Monovalent Selective Cation-exchange Membranes Prepared from PVA-based Block Copolymers

• HARADA Saeko

  Graduate School of Sciences and Technology for Innovation, Yamaguchi University

• KAKIHANA Yuriko

  Graduate School of Sciences and Technology for Innovation, Yamaguchi University Blue Energy Center for SGE Technology（BEST）

• HIGA Mitsuru

  Graduate School of Sciences and Technology for Innovation, Yamaguchi University Blue Energy Center for SGE Technology（BEST）

Abstract

In this study, we prepared novel PVA-based cation-exchange membranes having monovalent cation permselectivity by coating one of the membrane surfaces with an aqueous solution of PVA-based block copolymers. To determine the permselectivity between Na⁺ ions and Ca²⁺ ions through the membrane, electrodialysis was carried out using a mixed NaCl and CaCl ₂ solution. The permselectivity for Na⁺ ions against Ca²⁺ ions through the membrane increased with increasing coating concentration while membrane resistance was almost independent of the coating concentration. These results indicate that our modification method can be used to prepare a membrane with high permselectivity for monovalent ions without changing its membrane resistance.

Journal

• Bulletin of the Society of Sea Water Science, Japan

  Bulletin of the Society of Sea Water Science, Japan 72 (6), 338-339, 2018

  The Society of Sea Water Science, Japan

Keywords

• Monovalent ion
• Permselectivity
• Membrane resistance
• Poly（vinyl alcohol）
• Ion-exchange membrane

Details

• CRID: 1390564227303621888
• NII Article ID: 130007708865
• DOI: 10.11457/swsj.72.6_338
• ISSN: 21859213
• ISSN: 03694550
• Text Lang: en
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed