Low pressure high flux thin film nanofibrous composite membranes prepared by electrospraying technique combined with solution treatment

► Beaded PVA layer was fabricated via electrospraying on nanofibrous PAN substrate. ► The solution treatment bath was composed of water and acetone. ► Electrosprayed PVA top layer was swollen to an integrated barrier film. ► Ultrafiltration performances of the PVA/PAN composite membranes were evaluated.