Abstract
An ultrafiltration membrane with antibacterial effectiveness and high water flux was prepared from poly(ether sulfone) (PES) and zinc oxide (ZnO) nanoparticles grafted with poly(1-vinylpyrrolidone) (PVP-g-ZnO) and poly(1-vinylpyrrolidone-co-acrylonitrile) (P(VP-AN)-g-ZnO). The PES membrane did not exhibit antibacterial activity, whereas the PES membranes containing more than 0.5 wt % of ZnO nanoparticles exhibited antibacterial activity, regardless of the polymer grafted onto the ZnO. The solute rejection measured with the PES/P(VP-AN)-g-ZnO membrane was nearly identical to that measured with the PES membrane. The water flux of the PES membrane involving polymer-grafted ZnO nanoparticles was higher than that of the PES membrane containing pristine ZnO nanoparticles when the ZnO concentration in the membrane was fixed, The PES/PVP-g-ZnO and the PES/P(VP-AN)-g-ZnO membranes exhibited nearly identical water flux. Membranes exhibiting antibacterial effectiveness, improved water flux, and antifouling character...
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