Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets

Sulfonated polyether ether ketone is currently under investigation to replace the expensive Nafion® as polymer electrolyte membrane. Sulfonic acid group is hydrophilic in nature and plays a key role in proton transfer in polymer electrolyte membranes. The higher the degree of sulfonation the higher...

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Autores principales:	Sher Ayaz, Hai-Yin Yu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Functionalized graphene oxide Sulfonated polyether ether ketone Proton conductivity Methanol permeation Polymer electrolyte membrane Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/a0f383b44ea74c55b401f2d979c80214
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spelling	oai:doaj.org-article:a0f383b44ea74c55b401f2d979c802142021-11-24T04:24:43ZInvestigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets0142-941810.1016/j.polymertesting.2020.106941https://doaj.org/article/a0f383b44ea74c55b401f2d979c802142021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S014294182032170Xhttps://doaj.org/toc/0142-9418Sulfonated polyether ether ketone is currently under investigation to replace the expensive Nafion® as polymer electrolyte membrane. Sulfonic acid group is hydrophilic in nature and plays a key role in proton transfer in polymer electrolyte membranes. The higher the degree of sulfonation the higher proton conductivity in sPEEK based polymer exchange membrane is achieved; however, high degree of sulfonation causes severe dimensional instability due to higher water uptake which in turn affects membrane fuel retention capabilities as well as thermo-mechanical strength. Graphene oxide nanosheets were functionalized with aryl dizonium salt of p-Aminobenzene sulfonic acid for modification of sPEEK in low sulfonated state (DS = 53%) to improve its proton conductivity and suppress fuel crossover. The functionalization was carried out to compensate for the possible dilution of proton exchangeable sites by fillers. The resulting membranes were characterized in terms of morphology, thermo-mechanical behavior, methanol permeability, water uptake, and proton conductivities. The results proved that sulfonated GO not only improved thermo-mechanical behavior of the membrane but also dramatically increased proton conductivity (47 mS cm−1) than pristine sPEEK (25 mS cm−1). The composite membranes showed highly reduced methanol crossover compared with pristine sPEEK. The electrochemical selectivity increased from 9.5 × 104 Scm−3s (pristine sPEEK) to 26.9 × 104 Scm−3s.Sher AyazHai-Yin YuElsevierarticleFunctionalized graphene oxideSulfonated polyether ether ketoneProton conductivityMethanol permeationPolymer electrolyte membranePolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 93, Iss , Pp 106941- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Functionalized graphene oxide Sulfonated polyether ether ketone Proton conductivity Methanol permeation Polymer electrolyte membrane Polymers and polymer manufacture TP1080-1185
spellingShingle	Functionalized graphene oxide Sulfonated polyether ether ketone Proton conductivity Methanol permeation Polymer electrolyte membrane Polymers and polymer manufacture TP1080-1185 Sher Ayaz Hai-Yin Yu Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets
description	Sulfonated polyether ether ketone is currently under investigation to replace the expensive Nafion® as polymer electrolyte membrane. Sulfonic acid group is hydrophilic in nature and plays a key role in proton transfer in polymer electrolyte membranes. The higher the degree of sulfonation the higher proton conductivity in sPEEK based polymer exchange membrane is achieved; however, high degree of sulfonation causes severe dimensional instability due to higher water uptake which in turn affects membrane fuel retention capabilities as well as thermo-mechanical strength. Graphene oxide nanosheets were functionalized with aryl dizonium salt of p-Aminobenzene sulfonic acid for modification of sPEEK in low sulfonated state (DS = 53%) to improve its proton conductivity and suppress fuel crossover. The functionalization was carried out to compensate for the possible dilution of proton exchangeable sites by fillers. The resulting membranes were characterized in terms of morphology, thermo-mechanical behavior, methanol permeability, water uptake, and proton conductivities. The results proved that sulfonated GO not only improved thermo-mechanical behavior of the membrane but also dramatically increased proton conductivity (47 mS cm−1) than pristine sPEEK (25 mS cm−1). The composite membranes showed highly reduced methanol crossover compared with pristine sPEEK. The electrochemical selectivity increased from 9.5 × 104 Scm−3s (pristine sPEEK) to 26.9 × 104 Scm−3s.
format	article
author	Sher Ayaz Hai-Yin Yu
author_facet	Sher Ayaz Hai-Yin Yu
author_sort	Sher Ayaz
title	Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets
title_short	Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets
title_full	Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets
title_fullStr	Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets
title_full_unstemmed	Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets
title_sort	investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a0f383b44ea74c55b401f2d979c80214
work_keys_str_mv	AT sherayaz investigationofthermomechanicalbehaviorprotontransferandmethanolpermeationofpolymerelectrolytemembraneinlowsulfonatedstatemodifiedwiththermallystablesurfacefunctionalizedgrapheneoxidenanosheets AT haiyinyu investigationofthermomechanicalbehaviorprotontransferandmethanolpermeationofpolymerelectrolytemembraneinlowsulfonatedstatemodifiedwiththermallystablesurfacefunctionalizedgrapheneoxidenanosheets
_version_	1718416051617660928

Investigation of thermo-mechanical behavior, proton transfer and methanol permeation of polymer electrolyte membrane in low sulfonated state modified with thermally stable surface functionalized graphene oxide nanosheets

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