A simple synthesis technique for the preparation of anionic conducting membranes is presented. In the first step, poly-ether-ether-ketone (PEEK) reacts with chlorosulfonic acid to produce chlorosulfonated PEEK, which in a second step is transformed by reaction with a secondary amine, dimethyl- or diethylamine, into sulfaminated PEEK. The sulfaminated PEEK is cast and the membranes are functionalized in a last step by reaction with various aqueous acid solutions, including HCl, HBr, HNO3, H2SO4, and H3PO4. The spectroscopic, thermal, mechanical, permeability and electrical properties of the membranes are determined and discussed. The combination of appealing properties, such as high elastic modulus (∼1300 MPa), high thermal stability, low cation permeability, respectable anionic conductivity (2-4 mS cm-1), and a relatively simple and inexpensive synthesis make these new ionomers very promising for applications especially in acidic media, like in vanadium redox flow batteries.

Pasquini, L., Knauth, P., Pelzer, K., DI VONA, M.l. (2015). Anion-conducting sulfaminated aromatic polymers by acid functionalization. RSC ADVANCES, 5(70), 56636-56644 [10.1039/c5ra03583j].

Anion-conducting sulfaminated aromatic polymers by acid functionalization

PASQUINI, LUCA;DI VONA, MARIA LUISA
2015-01-01

Abstract

A simple synthesis technique for the preparation of anionic conducting membranes is presented. In the first step, poly-ether-ether-ketone (PEEK) reacts with chlorosulfonic acid to produce chlorosulfonated PEEK, which in a second step is transformed by reaction with a secondary amine, dimethyl- or diethylamine, into sulfaminated PEEK. The sulfaminated PEEK is cast and the membranes are functionalized in a last step by reaction with various aqueous acid solutions, including HCl, HBr, HNO3, H2SO4, and H3PO4. The spectroscopic, thermal, mechanical, permeability and electrical properties of the membranes are determined and discussed. The combination of appealing properties, such as high elastic modulus (∼1300 MPa), high thermal stability, low cation permeability, respectable anionic conductivity (2-4 mS cm-1), and a relatively simple and inexpensive synthesis make these new ionomers very promising for applications especially in acidic media, like in vanadium redox flow batteries.
2015
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/07 - FONDAMENTI CHIMICI DELLE TECNOLOGIE
English
Con Impact Factor ISI
Anionic conductivity; Chlorosulfonic acid; Conducting membrane; Functionalizations; High elastic modulus; High thermal stability; Synthesis techniques; Vanadium redox flow batteries
Pasquini, L., Knauth, P., Pelzer, K., DI VONA, M.l. (2015). Anion-conducting sulfaminated aromatic polymers by acid functionalization. RSC ADVANCES, 5(70), 56636-56644 [10.1039/c5ra03583j].
Pasquini, L; Knauth, P; Pelzer, K; DI VONA, Ml
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/118726
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