View article

Polysulfone (PSf) membranes are undesirably hydrophobic, thus they are susceptible to the fouling by most organic components including fatty acids. In this work, ZnO nanoparticles were blended into PSf membranes to improve its properties in reduction of fouling by oleic acid. The casting solution was prepared by dispersing 1–4wt.% of ZnO nanoparticles (21–23nm), 1wt.% of PVA and PSf into 1-methyl-2-pyrrolidinone at 75°C, with a stirring speed of 400rpm. The weight ratio of polymer to solvent is maintained at 1:4.84. The composite membranes were then prepared using phase inversion method. The mean pore size of the composite membranes is slightly larger than the mean pore size of pure PSf membrane. However, the water contact angle greatly reduces from 85° to 63° when 2wt.% of ZnO is added into Pf-2 membranes. Thermal stability of PSf membranes has significantly improved with the addition of ZnO …