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Transport of alkali metal ions against its concentration gradient through 2,3‐epithiopropyl methacrylate–methacrylic acid copolymer membrane
Author(s) -
aka Takamasa,
Maeda Hirotoshi,
Nakayama Morio,
Egawa Hiroaki
Publication year - 1987
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1987.070340313
Subject(s) - copolymer , membrane , methacrylic acid , methacrylate , cationic polymerization , polymer chemistry , alkali metal , chemistry , ultraviolet , ultraviolet light , materials science , photochemistry , polymer , organic chemistry , biochemistry , optoelectronics
Cationic exchange membranes were prepared with 2,3‐epithiopropyl methacrylate (ETMA)–methacrylic acid (MAc) copolymer. Transport of Li + against its concentration gradient through the membranes was investigated by using the system containing HCl and LiCl (left side) and LiOH (right side). The rate of transport of Li + increased with increasing MAc content in the membranes with less than 56.3 mol % MAc. The rate of transport and transport fraction of Li + could be increased by using the copolymer membranes irradiated with ultraviolet light, because the physical and chemical structure of the membrane made of ETMA–MAc copolymer can be easily changed by irradiation with ultraviolet light. The transport in this system, where one side of the membrane in a cell was acidic and the other alkaline, was influenced significantly by the initial H + concentration on the acidic side.