Ultrafiltration application of cellulose acetate-polyurethane blend membranes

Cellulose acetate membranes are widely used for reverse osmosis and ultrafi ltration applications. Cellulose acetate membranes were prepared by solutio n blending of cellulose acetate with polyurethane in polar solvent. The eff ect of varied concentrations of additive, polyvinylpyrrolidone, on the perf ormance of modified cellulose acetate/polyurethane blend membranes was stud ied. The cellulose acetate/polyurethane membranes were characterized based on pure water flux, compaction, water content, morphological studies and ap plied for proteins separations by ultrafiltration technique and are discuss ed in detail. (C) 1999 Elsevier Science Ltd. All rights reserved.