Martinez-Felipe, A.; Moliner Estopiñán, CE.; Imrie, CT.; Ribes Greus, MD. (2012). Characterization of Crosslinked Poly(vinyl alcohol)-Based Membranes with Different Hydrolysis Degrees for Their Use as Electrolytes in Direct Methanol Fuel Cells. Journal of Applied Polymer Science. 124:1000-1011. https://doi.org/10.1002/app.35138
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/84840
Título:
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Characterization of Crosslinked Poly(vinyl alcohol)-Based Membranes with Different Hydrolysis Degrees for Their Use as Electrolytes in Direct Methanol Fuel Cells
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Autor:
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Martinez-Felipe, Alfonso
Moliner Estopiñán, Cristina Elia
Imrie, Corrie Thomas
Ribes Greus, María Desamparados
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Entidad UPV:
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Universitat Politècnica de València. Instituto de Tecnología de Materiales - Institut de Tecnologia de Materials
Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería del Diseño - Escola Tècnica Superior d'Enginyeria del Disseny
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Fecha difusión:
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Resumen:
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The effect of the degree of hydrolysis of poly(vinyl alcohol) (PVA) substrates on the preparation and properties of crosslinked membranes prepared via esterification with sulfosuccinic acid (SSA) has been studied using ...[+]
The effect of the degree of hydrolysis of poly(vinyl alcohol) (PVA) substrates on the preparation and properties of crosslinked membranes prepared via esterification with sulfosuccinic acid (SSA) has been studied using attenuated total reflectance-Fourier transform spectroscopy (ATR-FTIR) and thermogravimetric analysis (TGA). Three PVA substrates with degrees of hydrolysis of 89, 96, and 99% were crosslinked using SSA at high temperatures. FTIR spectroscopy revealed that esterification occurred in all the membranes and to some extent, prior to heat treatment. The final morphology of the membranes was dependent on both the SSA concentration and the composition of the PVA substrate. Thermogravimetric analysis showed an increase in the thermal stability of the PVA-SSA membranes with respect to their PVA substrates arising from the formation of a crosslinked structure. In addition, TGA revealed the presence of free and tightly bound water in the PVA-SSA membranes. Thermal treatment had a more pronounced effect on the properties of the PVA substrates having higher degrees of hydrolysis. The results from the swelling tests, the ionic exchange capacities (IEC) and the tests in DMFC monocells demonstrated that a balance between water and methanol selectivity and ionic conduction determines the potential of these materials to act as electrolytes in fuel cells
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Palabras clave:
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Crosslinking
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FTIR
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Polymer synthesis and characterization
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Renewable resources
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Thermogravimetric analysis (TGA)
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ATR FTIR
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Bound waters
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Cross linked membranes
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Crosslinked
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Crosslinked structures
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Degree of hydrolysis
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FTIR spectroscopy
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High temperature
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Higher-degree
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Hydrolysis degree
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Ionic exchange
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Methanol selectivity
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Preparation and properties
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Renewable resource
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Swelling test
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Direct methanol fuel cells (DMFC)
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Electrolytes
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Esterification
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Esters
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Fourier transform infrared spectroscopy
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Heat treatment
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Hydrolysis
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Ion exchange
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Membranes
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Methanol
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Methanol fuels
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Polyvinyl alcohols
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Spectroscopy
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Substrates
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Thermodynamic stability
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Thermogravimetric analysis
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Derechos de uso:
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Cerrado |
Fuente:
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Journal of Applied Polymer Science. (issn:
0021-8995
)
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DOI:
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10.1002/app.35138
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Editorial:
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Wiley
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Versión del editor:
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http://dx.doi.org/10.1002/app.35138
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Código del Proyecto:
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info:eu-repo/grantAgreement/MICINN//IT2009-0074/ES/IT2009-0074/
info:eu-repo/grantAgreement/MEC//ENE2007-67584-C03-02/ES/ESTUDIO DE PILAS DE COMBUSTIBLE DISEÑADAS CON MEMBRANAS POLIMERICAS DOTADAS DE CONTROL MORFOLOGICO PARA BIO-ALCOHOLES/
info:eu-repo/grantAgreement/MICINN//UPOV08-3E-013/ES/ADQUISICIÓN DE EQUIPO PARA MEDIDAS DIELÉCTRICAS Y DE POLARIZACIÓN PARA NUEVOS MATERIALES APLICADOS A TECNOLOGÍAS ENERGÉTICAS/
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Agradecimientos:
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Contract grant sponsor: Generalitat Valenciana; contract grant number: Grisolia and Forteza 2010 and 2011.
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Tipo:
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Artículo
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