Abstract
In this study, polyvinyl alcohol nanospheres (PVA-NS) were successfully prepared by cross-linking in microemulsion system and the average size could be reduced to 225 nm. The characters of PVA-NS indicated that the hydrophilicity of PVA-NS was very strong, completely wettable by water owing to a mass of –OH on the PVA-NS surface and they were highly negatively charged ( ζ = −51.4 mV). Then two types of modified non-woven fabric (NWF) membranes were prepared (deposited and self-assembly membranes) and their hydrophilicity and anti-fouling properties were investigated. PVA-NS were used to fabricate deposited membranes and Hexadecyl trimethyl ammonium bromide (HTAB)/PVA-NS were used for self-assembly membranes. Membrane performances were changed by self-assembling or depositing PVA-NS on the surface of NWF membranes. HTAB/PVA-NS self-assembly membrane showed stronger hydrophilicity, greater permeability and anti-fouling performance compared to that of PVA-NS deposited membrane. The stability experiment results showed that self-assembly NWF membranes had excellent stability and it can be concluded that HTAB/PVA-NS self-assembly membranes will be simple and powerful alternative for fouling mitigation in MBR application.
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