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Abstract In this work, two types of thin film nanocomposite (TFN) membranes were developed (by incorporating either 0.05 wt/v% surface-modified nanoporous titanium oxide (f-nTiO2) or titanate nanotube (f-TNT) in the polyamide… Click to show full abstract
Abstract In this work, two types of thin film nanocomposite (TFN) membranes were developed (by incorporating either 0.05 wt/v% surface-modified nanoporous titanium oxide (f-nTiO2) or titanate nanotube (f-TNT) in the polyamide selective layer) to investigate the impacts of nanomaterial structures (i.e., sizes and shapes) on membrane properties and desalination performances. The filtration results revealed that the incorporation of f-nTiO2 yielded membrane of better filtration performances than the one incorporated with f-TNT. Compared to the TFN-f-TNT membrane, the TFN-f-nTiO2 membrane possessed greater water flux (4.26 vs. 3.36 L/m2 h bar) and higher NaCl (98.04 vs. 97.28%) and boron rejection (54.82 vs. 48.86%). It was also found that surface coating of TFN membranes with hydrophilic polyvinyl alcohol could further improve membrane solute rejection (up to 9%) with slight reduction in water flux.
Journal Title: Composites Part B: Engineering
Year Published: 2019
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