Effect of benzoic acid content on aging of 6FDA copolyimides based thin film composite (TFC) membranes in CO2/CH4 environment KU Leuven
© 2018 Elsevier B.V. 6FDA based polyimides possess outstanding properties, with a high free volume fraction entailing in high permselectivity properties for gas separation processes. However, they are very sensitive to aging process. Copolyimdes 6FDA–DAM:DABA were synthesized using different ratios of diamines: (9:1), (3:1) and (2:1) and the homopolyimide 6FDA–DAM. Thin Film Composite membranes were prepared and thermally annealed at 300 °C for ...