RT info:eu-repo/semantics/doctoralThesis
T1 Development of polymer materials for applications in industrially relevant gas separation processes
A1 Rico Martínez, Sandra
A2 Universidad de Valladolid. Escuela de Doctorado
K1 Polímeros
K1 Membranes
K1 Membranas
K1 Gas separation
K1 Separación de gases
K1 Polyimides
K1 Poliimidas
K1 Porous polymers
K1 Polímeros porosos
K1 2303 Química Inorgánica
AB Polymeric membranes are a promising technology for efficient and selective gas separation, offering advantages such as energy efficiency, compact design, and operational simplicity. Among the wide variety of polymers used as membrane materials, aromatic polyimides are notable polymers in this field, offering exceptional thermal and chemical stability, mechanical strength, and feasibility of being processed as membranes. When properly designed, these materials are highly attractive for gas separation applications. However, aromatic polyimides used for gas separation face the well-known trade-off between permeability and selectivity, requiring further research to achieve higher-performance materials. This PhD thesis focuses on developing innovative materials with improved permeability vs selectivity balance performance. The proposed research approach adopts three primary strategies: integrating bipyridine groups into polymer backbones to enhance gas solubility, adding porous organic polymers to polyimide matrixes to fabricate mixed matrix membranes to improve gas diffusivity, and introducing metal salts to obtain facilitated transport materials. To achieve these goals, two families of polymers were designed and synthesized: bipyridine-based aromatic polyimides and bipyridine-containing porous organic polymers (POPs), both materials were destined for CO2 capture. Additionally, Ag(I) salts were incorporated inside the POP structures through the bipyridine moiety for making mixed matrix membranes as light olefin purification materials. All synthesized materials demonstrated outstanding chemical and thermal stability, as well as robust mechanical properties, enabling their application in gas separation processes. The resulting membranes exhibited big improvements in gas separations, particularly for CO2/N2 and C3H6/C3H8 gas pairs.
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/75875
UL https://uvadoc.uva.es/handle/10324/75875
LA eng
NO Escuela de Doctorado
DS UVaDOC
RD 12-jun-2025