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Reduction of the monomer quantities required for the preparation of radiation-grafted alkaline anion-exchange membranes

Poynton, SD and Varcoe, JR (2015) Reduction of the monomer quantities required for the preparation of radiation-grafted alkaline anion-exchange membranes Solid State Ionics, 277. pp. 38-43.

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Abstract

Alkaline anion-exchange membranes (AAEM) for alkaline polymer electrolyte fuel cells (APEFC) were successfully prepared using electron beam irradiated poly(ethylene-co-tetrafluoroethylene) precursor films grafted with vinylbenzyl chloride (VBC) monomer. The resulting chloromethyl groups were subsequently reacted with trimethylamine to form quaternary ammonium anion-exchange functional head-groups. The concentration of toxic and expensive VBC, that is required to achieve an optimal level of grafting, was reduced from 100%v/v (undiluted) to 20%v/v by dilution with propan-2-ol and the inclusion of a surfactant. Fuel cell tests using hydrogen and oxygen gave the same peak power densities (164 ± 3 mW cm- 2) for the AAEMs prepared with both 100%v/v VBC and 20%v/v VBC. This highlights the (desirable) lack of any detrimental effect on performance of the resulting APEFC with the reduction in grafting monomer concentration used for the synthesis of the component AAEM.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
AuthorsEmailORCID
Poynton, SDUNSPECIFIEDUNSPECIFIED
Varcoe, JRUNSPECIFIEDUNSPECIFIED
Date : September 2015
Identification Number : 10.1016/j.ssi.2015.04.013
Additional Information : NOTICE: this is the author’s version of a work that was accepted for publication in Solid State Ionics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solid State Ionics, 277, September 2015, DOI 10.1016/j.ssi.2015.04.013.
Depositing User : Symplectic Elements
Date Deposited : 23 Jun 2015 14:29
Last Modified : 01 Sep 2016 01:08
URI: http://epubs.surrey.ac.uk/id/eprint/807864

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