Articles

Thèse soutenue publiquement le 29 mai 2024 devant le jury composé de : M Fabrice GOUANVE, Maître de Conférences HDR, Université Claude Bernard Lyon 1 – Rapporteur M Anthony SZYMCZYK, Professeur des Universités, Université de Rennes – Rapporteur Mme Géraldine GOUHIER, Professeur des Universités, Université de Rouen Normandie - Examinateur M Cédric PLESSE, Professeur des Universités, CY Cergy Paris Université – Examinateur M Nicolas DESILLES, Maître de Conférences HDR, INSA Rouen Normandie – Directeur de thèse Mme Kateryna FATYEYEVA, Maître de Conférences HDR, Université de Rouen Normandie – Co-Directeur de thèse   Résumé : Currently, the emission of CO₂, which is the primary contributor to global warming, is increasing at an alarming rate. Consequently, there is a growing global need for cutting-edge technologies that can effectively separate and capture CO₂. In the present work, a series of PSF/IL and PES/IL composite membranes for CO₂ separation were investigated. Six ILs ([Meim][TFSO₃], [Vim][TFSO₃], [Meim][Tf₂N], [Vim][Tf₂N], Li(DOBA)[Tf₂N] and Li(HDA)[Tf₂N]) were synthesized successfully and characterized by FT-IR, ¹H NMR, TGA and DSC. Composite membranes with different IL loadings were fabricated by solution casting method and exhaustively studied by FT-IR, TGA, DSC, SEM, F-mapping, surface energy, tensile tests, and gas permeation (CO₂, N₂ and O₂). Under 25°C and 4 bar, PES/10[Vim][Tf₂N] membrane showed a CO₂ permeability of 1.92 Barrer with improved CO₂/N₂ and CO₂/O₂ selectivities of 20.4 and 6.1, respectively.