01728nam a2200313Ia 4500 MX-MdCICY 20260521091119.0 CICY B-8684 Gas separation of 6FDA-6FpDA membranes Effect of the solvent on polymer surfaces and permselectivity Journal of Membrane Science, 293(1-2), p.22-28, 2007 The aim of this work has been to analyze how different solvents used in the manufacture of gas separation membranes, based on 6FDA-6FpDA, influence permeability and selectivity. It has been shown that a low boiling point and/or a repulsive interaction between the solvent and the polymer increase both selectivity and permeability for O2/N2 and, specially, for CO2/CH4 gas pairs. These results have been explained in terms of fractional free volume and intersegmental mobility. In particular it has been shown that good solubility of the polymer results in a high glass transition temperature and planar surface as characterised by the fractal dimension of the resulting membranes, obtained from AFM analysis. FLUORINATED POLYIMIDES GAS SEPARATION FRACTIONAL FREE VOLUME FRACTAL DIMENSION SOLUBILITY PARAMETER Recio, R. Palacio, L. Prádanos, P. Hernández, A. Lozano, A.E. Marcos, A. De La Campa, J.G: De La Campa, J.G: https://drive.google.com/file/d/1oZGSIbyYgksBKg91567QSQzbj99Tt7md/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 18925 18925 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-8684 2025-06-25 12:47:25 2025-06-25 REF1