Influence of solvent and non-solvent on polyimide asymmetric membranes formation in relation to gas permeation

Nathalie Leblanc (1) , Didier Le Cerf (1) , Corinne Chappey (1) , Dominique Langevin (1) , Michel Métayer (1) , Muller Guy (1)

1 PBM - Polymères, biopolymères, membranes

Asymmetric 2,2-bis (3,4-dicarboxyphenyl) hexafluoropropane dianhydride (6FDA)-2-methyl-1, 3-phenylenediamine (mPDA) polyimide membranes were prepared by phase inversion process. Using different non-solvents and solvents, the correlation between membrane elaboration conditions and final morphology and properties has been investigated. Equilibrium thermodynamics and diffusion coefficients data were determined as a preliminary analysis in order to underline competitivity between thermodynamic and kinetic parameters. Scanning electron microscopy and gas permeation experiments (CO2, N2) were used for the determination of structure-permeability relationships. Sponge-like structure membranes and highest selectivity were obtained when using non-solvent/solvent/6FDA-mPDA systems having important coagulation time.

Mots clés: Asymmetric membrane; Polyimide; Wet–wet process; Microscopy; Gas permeation

Domaines: Polymères; Matériaux

Nathalie Leblanc, Didier Le Cerf, Corinne Chappey, Dominique Langevin, Michel Métayer, et al.. Influence of solvent and non-solvent on polyimide asymmetric membranes formation in relation to gas permeation. Separation and Purification Technology, 2001, 22-23, pp.277-285. ⟨10.1016/S1383-5866(00)00129-5⟩. ⟨hal-01869136⟩