Article (Scientific journals)
High performance cation exchange membranes synthesized: Via in situ emulsion polymerization without organic solvents and corrosive acids
Jiang, Shanxue; LADEWIG, Bradley Paul
2019In Journal of Materials Chemistry A, 7 (29), p. 17400 - 17411
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Keywords :
Cation exchange membranes; Cation exchange resins; In-situ emulsion polymerization; In-situ polymerization; Ion exchange capacity; Membrane synthesis; Preparation procedures; Sulfonation process; Chemistry (all); Renewable Energy, Sustainability and the Environment; Materials Science (all); General Materials Science; General Chemistry
Abstract :
[en] The synthesis of cation exchange membranes (CEMs) usually involves using organic solvents and/or a sulfonation process. In this study, green and scalable synthesis of high performance CEMs is achieved without organic solvents and sulfonation. The synthesis is carried out via in situ polymerization of lithium styrene sulfonate in a porous support. Different preparation procedures are developed and optimized. Functional sulfonate groups are successfully loaded onto and into the membrane support, as verified by FTIR. Besides, water plays an important role in membrane synthesis. By reducing the amount of water used, the ratio of functional polymers to the membrane support in the synthesized CEMs is increased. Therefore, the synthesized CEMs show increased ion exchange capacity (IEC). This is significant because it means that high IEC can be achieved without introducing cation exchange resins into the membranes. Finally, the synthesized membranes demonstrate high desalination performance. This new methodology may shed new light on preparing CEMs in an efficient and eco-friendly way.
Disciplines :
Chemical engineering
Author, co-author :
Jiang, Shanxue ;  Barrer Centre, Department of Chemical Engineering, Imperial College London, London, United Kingdom
LADEWIG, Bradley Paul  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) ; Barrer Centre, Department of Chemical Engineering, Imperial College London, London, United Kingdom ; Institute of Micro Process Technology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
External co-authors :
yes
Language :
English
Title :
High performance cation exchange membranes synthesized: Via in situ emulsion polymerization without organic solvents and corrosive acids
Publication date :
2019
Journal title :
Journal of Materials Chemistry A
ISSN :
2050-7488
eISSN :
2050-7496
Publisher :
Royal Society of Chemistry
Volume :
7
Issue :
29
Pages :
17400 - 17411
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Imperial College London
Funding text :
Bradley P. Ladewig gratefully acknowledges nancial support from Imperial College London. Shanxue Jiang gratefully acknowledges the Department of Chemical Engineering at Imperial College London for providing the PhD scholarship. The authors would like to thank Dr Mahmoud Ardakani for his help with SEM. We thank Patricia Carry and Kaho Cheung for their help with FTIR and STA. We thank Dr Bo Wang and Vatsal Shah for providing support to use the goniometer. We thank David Crawford for building up the electrodialysis system.
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