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Issue 92, 2015
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Novel composite membranes based on sulfonated poly(ether ether ketone) and adenosine triphosphate for enhanced proton conduction

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Abstract

Adenosine triphosphate (ATP) molecules, which contain proton-conductive phosphoric acid groups, imidazole groups and amino groups are incorporated into sulfonated poly(ether ether ketone) (SPEEK) to fabricate novel composite membranes. The morphology, structure and proton conduction abilities of the prepared membranes are investigated. ATP coalesces with SPEEK through ionic interactions between amino groups and sulfonic acid groups, which are beneficial to the stable existence of ATP molecules within polymer networks and enhance the thermal stability of the composite membranes. Due to the formation of abundant acid–base pairs among ATP molecules as well as between ATP and SPEEK chains, the proton conductivities of composite membranes under different conditions are increased in comparison with the plain SPEEK membrane, and this improvement becomes more evident when humidity is decreased. Particularly, the SPEEK/ATP composite membrane displays a highest proton conductivity of 0.198 S cm1 at 80 °C and 100% RH. The proton conductivity of the SPEEK/ATP-20 membrane at 41% RH is nearly 30 times higher than that of the plain SPEEK membrane. The results indicate a promising potential of such acid–base pairs which contain –PO3H2 groups in enhancing the proton conduction of membrane materials.

Graphical abstract: Novel composite membranes based on sulfonated poly(ether ether ketone) and adenosine triphosphate for enhanced proton conduction

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Article information


Submitted
17 Jul 2015
Accepted
01 Sep 2015
First published
01 Sep 2015

RSC Adv., 2015,5, 75434-75441
Article type
Paper

Novel composite membranes based on sulfonated poly(ether ether ketone) and adenosine triphosphate for enhanced proton conduction

Y. Yin, J. Wang, S. Jiang, X. Yang, X. Zhang, Y. Cao, L. Cao and H. Wu, RSC Adv., 2015, 5, 75434
DOI: 10.1039/C5RA14143E

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