Development of proton exchange membranes based in polymer@ionic liquid composites
ABSTRACT: Ionic liquids (IL), liquid salts at room temperature are being explored in different applications due to their good properties such as high chemical and thermal stability, high ion conductivity or non volatility. IL can be combined with a wide variety of polymers for the production of soli...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universidad de Cantabria (UC) |
| Repositorio: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unican.es:10902/12337 |
| Acceso en línea: | http://hdl.handle.net/10902/12337 |
| Access Level: | acceso abierto |
| Palabra clave: | Membranes Composites PVDF-HFP Ionic liquids Fuel cells Membranas Líquidos iónicos Pilas de combustible |
| Sumario: | ABSTRACT: Ionic liquids (IL), liquid salts at room temperature are being explored in different applications due to their good properties such as high chemical and thermal stability, high ion conductivity or non volatility. IL can be combined with a wide variety of polymers for the production of solid membranes which combine the good mechanical properties of the polymeric materials with the properties of the ionic liquids previously mentioned. One of the most interesting applications of these composites is the development of proton exchange membranes (PEM) with high proton conductivity in dry and wet states, good mechanical strength and thermal stability. This work focuses on the development of polymer@ionic liquid membranes using different types of ionic liquids. In particular, the study was focused on the use of PVDF-HFP and three different protic ionic liquids (Diethylmethylammonium trifluoromethanesulfonate, 1-Methylimidazolium bis(trifluoromethylsulfonyl)imide and 1-Methylimidazolium chloride). The membranes were synthesized under different conditions and posteriorly characterized by several techniques (SEM, contact angle, mechanical tests, TGA, FTIR and electrical measurements) in order to compare the properties of the membranes with the different ionic liquids and select the most appropriate for specific applications. From the results, it has been observed how aspects such as morphology, hydrophobicity, conductivity or mechanical properties change depending on the synthesis procedure employed and on the type and amount of ionic liquid used. |
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