Fouling propensity and separation efficiency of epoxidated polyethersulfone incorporated cellulose acetate ultrafiltration membrane in the retention of proteins

► Epoxy functionalized polyethersulfone was prepared. ► CA/EPES ultrafiltration membranes were developed by phase inversion technique. ► Compatibility, morphology and separation efficiency of the membranes were studied. ► Fouling propensity of the membranes was studied by BSA as the model foulant. ► Degree reversible and irreversible fouling and flux recovery ratio were calculated.