Sulfonated aromatic polymers (SAP) are promising ionomer materials, however for applications as fuel cell membranes these polymers must be improved in terms of durability. The goal is to achieve a locally high density of functional groups such as sulfonic acid groups, but to keep the swelling low by appropriate cross- linking. Thermal cross-linking in presence of residual solvent dimethylsulfoxide without any addition of cross-linker molecules increases spectacularly the mechanical and hydrolytic stability of SAP, making them suitable for use up to 130 °C. The developed method is also inexpensive, being incorporated in the normal membrane casting procedure.

Di Vona, M.l., Sgreccia, E., Knauth, P. (2013). Cross-linked aromatic polymers for high durability PEM membranes: materials and methods. ECS TRANSACTIONS, 50(2), 1021-1030 [10.1149/05002.1021ecst].

Cross-linked aromatic polymers for high durability PEM membranes: materials and methods

Di Vona M. L.;Sgreccia E.;
2013-01-01

Abstract

Sulfonated aromatic polymers (SAP) are promising ionomer materials, however for applications as fuel cell membranes these polymers must be improved in terms of durability. The goal is to achieve a locally high density of functional groups such as sulfonic acid groups, but to keep the swelling low by appropriate cross- linking. Thermal cross-linking in presence of residual solvent dimethylsulfoxide without any addition of cross-linker molecules increases spectacularly the mechanical and hydrolytic stability of SAP, making them suitable for use up to 130 °C. The developed method is also inexpensive, being incorporated in the normal membrane casting procedure.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/07
Settore CHIM/05
English
Con Impact Factor ISI
Di Vona, M.l., Sgreccia, E., Knauth, P. (2013). Cross-linked aromatic polymers for high durability PEM membranes: materials and methods. ECS TRANSACTIONS, 50(2), 1021-1030 [10.1149/05002.1021ecst].
Di Vona, Ml; Sgreccia, E; Knauth, P
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/279103
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