RT info:eu-repo/semantics/doctoralThesis T1 Nuevas redes de polímeros porosos para separaciones avanzadas; membranas mixtas de matriz polimérica para captura de CO2 A1 Matesanz Niño, Laura A2 Universidad de Valladolid. Escuela de Doctorado K1 Catalisis K1 Materials K1 Materiales K1 23 Química AB Aromatic polyimides are polymers that have excellent thermal and chemical stability, mechanical robustness, easy processability, and when they are correctly designed are attractive materials for gas separation applications. However, gas-separation aromatic polyimide materials are susceptible to plasticization and physical aging, especially those with high-free volume polyimides, and thus exhibit poor long-term stability. In this context, the present Ph.D. thesis aims to develop new materials that not only provide a good gas selectivity/gas permeability balance but also an enhanced CO2-induced plasticization and aging resistance, in particular using two main approaches: polymer blending, including mixed matrix membranes, and thermal crosslinking YR 2024 FD 2024 LK https://uvadoc.uva.es/handle/10324/67220 UL https://uvadoc.uva.es/handle/10324/67220 LA spa NO Escuela de Doctorado DS UVaDOC RD 01-sep-2024