Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation

The mechanical properties of polybenzimidazole (PBI) and poly [2,5-benzimidazole] (ABPBI) membranes, possible candidates to replace Nafion as proton exchange membranes in direct methanol fuel cells (DMFC), were studied. It was observed by AFM imaging that the morphology of the ABPBI membranes strong...

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Detalles Bibliográficos
Autores principales:	Franceschini, E.A., Corti, H.R.
Formato:	JOUR
Materias:	AFM Elastic modulus Fuel cells Membranes Nafion Polybenzimidazole Atomic force microscopy Biomechanics Electrochemistry Formic acid Ion exchange membranes Mechanical properties Methanol Methanol fuels Organic acids Phosphoric acid Afm imaging Benzimidazole Elastic properties Force curves Force spectroscopies High temperatures Low temperatures Mechanical behaviors Membrane electrode assemblies Methanesulphonic acids Nafion membranes Nano indentations Polymer chains Proton exchange membranes Swelling forces Elastic moduli
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_03787753_v188_n2_p379_Franceschini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_03787753_v188_n2_p379_Franceschini
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spelling	todo:paper_03787753_v188_n2_p379_Franceschini2023-10-03T15:33:15Z Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation Franceschini, E.A. Corti, H.R. AFM Elastic modulus Fuel cells Membranes Nafion Polybenzimidazole Atomic force microscopy Biomechanics Electrochemistry Formic acid Fuel cells Ion exchange membranes Mechanical properties Methanol Methanol fuels Organic acids Phosphoric acid AFM Afm imaging Benzimidazole Elastic properties Force curves Force spectroscopies High temperatures Low temperatures Mechanical behaviors Membrane electrode assemblies Methanesulphonic acids Nafion Nafion membranes Nano indentations Polybenzimidazole Polymer chains Proton exchange membranes Swelling forces Elastic moduli The mechanical properties of polybenzimidazole (PBI) and poly [2,5-benzimidazole] (ABPBI) membranes, possible candidates to replace Nafion as proton exchange membranes in direct methanol fuel cells (DMFC), were studied. It was observed by AFM imaging that the morphology of the ABPBI membranes strongly depends on the casting procedure, performed at high temperature from methanesulphonic acid and at low temperature from formic acid. The elastic moduli of the undoped and phosphoric acid doped membranes were determined using the AFM force spectroscopy technique and the differences observed with doped and undoped PBI and Nafion membranes, were discussed in terms of the electrostatic and swelling forces between polymer chains. The analysis of the force curves indicates differences in the mechanical behavior of doped PBI and ABPBI membranes compared to Nafion, which could have practical consequences on the stability of the membrane electrode assemblies. © 2009 Elsevier B.V. All rights reserved. Fil:Franceschini, E.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Corti, H.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03787753_v188_n2_p379_Franceschini
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	AFM Elastic modulus Fuel cells Membranes Nafion Polybenzimidazole Atomic force microscopy Biomechanics Electrochemistry Formic acid Fuel cells Ion exchange membranes Mechanical properties Methanol Methanol fuels Organic acids Phosphoric acid AFM Afm imaging Benzimidazole Elastic properties Force curves Force spectroscopies High temperatures Low temperatures Mechanical behaviors Membrane electrode assemblies Methanesulphonic acids Nafion Nafion membranes Nano indentations Polybenzimidazole Polymer chains Proton exchange membranes Swelling forces Elastic moduli
spellingShingle	AFM Elastic modulus Fuel cells Membranes Nafion Polybenzimidazole Atomic force microscopy Biomechanics Electrochemistry Formic acid Fuel cells Ion exchange membranes Mechanical properties Methanol Methanol fuels Organic acids Phosphoric acid AFM Afm imaging Benzimidazole Elastic properties Force curves Force spectroscopies High temperatures Low temperatures Mechanical behaviors Membrane electrode assemblies Methanesulphonic acids Nafion Nafion membranes Nano indentations Polybenzimidazole Polymer chains Proton exchange membranes Swelling forces Elastic moduli Franceschini, E.A. Corti, H.R. Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation
topic_facet	AFM Elastic modulus Fuel cells Membranes Nafion Polybenzimidazole Atomic force microscopy Biomechanics Electrochemistry Formic acid Fuel cells Ion exchange membranes Mechanical properties Methanol Methanol fuels Organic acids Phosphoric acid AFM Afm imaging Benzimidazole Elastic properties Force curves Force spectroscopies High temperatures Low temperatures Mechanical behaviors Membrane electrode assemblies Methanesulphonic acids Nafion Nafion membranes Nano indentations Polybenzimidazole Polymer chains Proton exchange membranes Swelling forces Elastic moduli
description	The mechanical properties of polybenzimidazole (PBI) and poly [2,5-benzimidazole] (ABPBI) membranes, possible candidates to replace Nafion as proton exchange membranes in direct methanol fuel cells (DMFC), were studied. It was observed by AFM imaging that the morphology of the ABPBI membranes strongly depends on the casting procedure, performed at high temperature from methanesulphonic acid and at low temperature from formic acid. The elastic moduli of the undoped and phosphoric acid doped membranes were determined using the AFM force spectroscopy technique and the differences observed with doped and undoped PBI and Nafion membranes, were discussed in terms of the electrostatic and swelling forces between polymer chains. The analysis of the force curves indicates differences in the mechanical behavior of doped PBI and ABPBI membranes compared to Nafion, which could have practical consequences on the stability of the membrane electrode assemblies. © 2009 Elsevier B.V. All rights reserved.
format	JOUR
author	Franceschini, E.A. Corti, H.R.
author_facet	Franceschini, E.A. Corti, H.R.
author_sort	Franceschini, E.A.
title	Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation
title_short	Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation
title_full	Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation
title_fullStr	Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation
title_full_unstemmed	Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation
title_sort	elastic properties of nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by afm tip nano-indentation
url	http://hdl.handle.net/20.500.12110/paper_03787753_v188_n2_p379_Franceschini
work_keys_str_mv	AT franceschiniea elasticpropertiesofnafionpolybenzimidazoleandpoly25benzimidazolemembranesdeterminedbyafmtipnanoindentation AT cortihr elasticpropertiesofnafionpolybenzimidazoleandpoly25benzimidazolemembranesdeterminedbyafmtipnanoindentation
_version_	1782029996578045952

Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation

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