Optimization of polyurethane-based hollow fiber membranes morphology and performance by post-treatment methods

► PU-based hollow fiber microfiltration membranes were fabricated by MSCS method. ► Effects of post-treatment on the morphology and performances were investigated. ► All the membranes cross-section showed sponge-like structure. ► Pore size on the surface decreased with the heat-treatment temperature increase. ► Membrane with best water flux was obtained when draw ratio was 3 at 50 °C for 50 min.