Tuning the electrochemical properties of novel asymmetric integral sulfonated polysulfone cation exchange membranes
(2021) In Molecules 26(2).- Abstract
In this study, novel asymmetric integral cation exchange membranes were prepared by the wet phase inversion of sulfonated polysulfone (SPSf) solutions. SPSf with different degrees of sulfonation (DS) was synthesized by variation in the amount of chlorosulfonic acid utilized as a sulfonating agent. The characterization of SPSf samples was performed using FTIR and1H-NMR techniques. SPSf with a DS of 0.31 (0.67 meq/g corresponding ion exchange capacity) was chosen to prepare the membranes, as polymers with a higher DS resulted in poor mechanical properties and excessive swelling in water. By a systematic study, the opportunity to tune the properties of SPSf membranes by acting on the composition of the polymeric solution was... (More)
In this study, novel asymmetric integral cation exchange membranes were prepared by the wet phase inversion of sulfonated polysulfone (SPSf) solutions. SPSf with different degrees of sulfonation (DS) was synthesized by variation in the amount of chlorosulfonic acid utilized as a sulfonating agent. The characterization of SPSf samples was performed using FTIR and1H-NMR techniques. SPSf with a DS of 0.31 (0.67 meq/g corresponding ion exchange capacity) was chosen to prepare the membranes, as polymers with a higher DS resulted in poor mechanical properties and excessive swelling in water. By a systematic study, the opportunity to tune the properties of SPSf membranes by acting on the composition of the polymeric solution was demonstrated. The effect of two different phase inversion parameters, solvent type and co-solvent ratio, were investigated by morphological and electrochemical characterization. The best properties (permselectivity of 0.86 and electrical resistance of 6.3 Ω·cm2 ) were obtained for the membrane prepared with 2-propanol (IPA):1-Methyl-2-pyrrolidinone (NMP) in a 20:80 ratio. This membrane was further characterized in different solution concentrations to estimate its performance in a Reverse Electrodialysis (RED) operation. Although the estimated generated power was less than that of the commercial CMX (Neosepta) membrane, used as a benchmark, the tailor-made membrane can be considered as a cost-effective alternative, as one of the main limitations to the commercialization of RED is the high membrane price.
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- author
- Avci, Ahmet Halil LU ; Van Goethem, Cédric ; Rijnaarts, Timon ; Santoro, Sergio ; Aquino, Marco ; Di Profio, Gianluca ; Vankelecom, Ivo F. J. ; De Vos, Wiebe M. ; Fontananova, Enrica and Curcio, Efrem
- publishing date
- 2021-01-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Cation exchange membrane, Chlorosulfonation, Electrochemical characterization, Reverse electrodialysis, Sulfonated polysulfone
- in
- Molecules
- volume
- 26
- issue
- 2
- article number
- 265
- pages
- 17 pages
- publisher
- MDPI AG
- external identifiers
-
- scopus:85099901279
- pmid:33430426
- ISSN
- 1420-3049
- DOI
- 10.3390/molecules26020265
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
- id
- 189769c4-601d-4175-b3ac-b9d36e78853d
- date added to LUP
- 2022-05-13 10:47:52
- date last changed
- 2024-06-17 20:20:58
@article{189769c4-601d-4175-b3ac-b9d36e78853d,
abstract = {{<p>In this study, novel asymmetric integral cation exchange membranes were prepared by the wet phase inversion of sulfonated polysulfone (SPSf) solutions. SPSf with different degrees of sulfonation (DS) was synthesized by variation in the amount of chlorosulfonic acid utilized as a sulfonating agent. The characterization of SPSf samples was performed using FTIR and<sup>1</sup>H-NMR techniques. SPSf with a DS of 0.31 (0.67 meq/g corresponding ion exchange capacity) was chosen to prepare the membranes, as polymers with a higher DS resulted in poor mechanical properties and excessive swelling in water. By a systematic study, the opportunity to tune the properties of SPSf membranes by acting on the composition of the polymeric solution was demonstrated. The effect of two different phase inversion parameters, solvent type and co-solvent ratio, were investigated by morphological and electrochemical characterization. The best properties (permselectivity of 0.86 and electrical resistance of 6.3 Ω·cm<sup>2</sup> ) were obtained for the membrane prepared with 2-propanol (IPA):1-Methyl-2-pyrrolidinone (NMP) in a 20:80 ratio. This membrane was further characterized in different solution concentrations to estimate its performance in a Reverse Electrodialysis (RED) operation. Although the estimated generated power was less than that of the commercial CMX (Neosepta) membrane, used as a benchmark, the tailor-made membrane can be considered as a cost-effective alternative, as one of the main limitations to the commercialization of RED is the high membrane price.</p>}},
author = {{Avci, Ahmet Halil and Van Goethem, Cédric and Rijnaarts, Timon and Santoro, Sergio and Aquino, Marco and Di Profio, Gianluca and Vankelecom, Ivo F. J. and De Vos, Wiebe M. and Fontananova, Enrica and Curcio, Efrem}},
issn = {{1420-3049}},
keywords = {{Cation exchange membrane; Chlorosulfonation; Electrochemical characterization; Reverse electrodialysis; Sulfonated polysulfone}},
language = {{eng}},
month = {{01}},
number = {{2}},
publisher = {{MDPI AG}},
series = {{Molecules}},
title = {{Tuning the electrochemical properties of novel asymmetric integral sulfonated polysulfone cation exchange membranes}},
url = {{http://dx.doi.org/10.3390/molecules26020265}},
doi = {{10.3390/molecules26020265}},
volume = {{26}},
year = {{2021}},
}