Mixed matrix membranes comprising glassy polymers and dispersed mesoporous silica spheres for gas separation
Mixed matrix membranes (MMMs) composed of polyimide Matrimid® and mesoporous silica spheres (MSSs) are prepared, characterized and tested in gas separation of equimolar mixtures H2/CH4 and CO2/N2 at different temperatures. Their performance is compared with MMMs using other glassy polymer: polysulfo...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Estado: | Versión enviada para evaluación y publicación |
| Data de publicação: | 2011 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/368449 |
| Acesso em linha: | http://hdl.handle.net/10261/368449 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Mixed matrix membranes Gas separation Mesoporous silica sphere Polysulfone Polyimide |
| Resumo: | Mixed matrix membranes (MMMs) composed of polyimide Matrimid® and mesoporous silica spheres (MSSs) are prepared, characterized and tested in gas separation of equimolar mixtures H2/CH4 and CO2/N2 at different temperatures. Their performance is compared with MMMs using other glassy polymer: polysulfone Udel®. The convenience of removing the structural agent from the pores and activating the mesoporous with calcination or chemical extraction has been studied. In both studied polymers, the permeability of the selective gas increases with the filler and the selectivity has a maximum at 8 wt% filler loading. These improvements are related to the mesoporosity of the filler, good interaction between the filler and the polymer, and change in the polymer structure as indicated in the characterization done by thermogravimetric analysis, X-ray diffraction, differential scanning calorimetry, and scanning and transmission electron microscopy. |
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