MEMBRANE FORMATION WITH CO_2-ASSISTED PHASE INVERSION METHOD. SOLVENT POWER AND DEPRESSURIZATION EFFECT

摘要

In the present work polysulfone membrane were prepared using a CO_2-assisted phase inversion method. N-Methylpyrrolidone, N,N-Dimethylacetamide and N,N Dimethylformamide were used to solubilise the polymer. Preliminary results suggest that mutual affinity between solvent - CO_2 and depressurization are able to modulate the pore size and the surface of the membranes.