Please use this identifier to cite or link to this item: https://doi.org/10.1038/srep19593
Title: Hydrophilic Mineral Coating of Membrane Substrate for Reducing Internal Concentration Polarization (ICP) in Forward Osmosis
Authors: Liu, Q 
Li, J 
Zhou, Z 
Xie, J 
Lee, J.Y 
Issue Date: 2016
Publisher: Nature Publishing Group
Citation: Liu, Q, Li, J, Zhou, Z, Xie, J, Lee, J.Y (2016). Hydrophilic Mineral Coating of Membrane Substrate for Reducing Internal Concentration Polarization (ICP) in Forward Osmosis. Scientific Reports 6 : 19593. ScholarBank@NUS Repository. https://doi.org/10.1038/srep19593
Abstract: Internal concentration polarization (ICP) is a major issue in forward osmosis (FO) as it can significantly reduce the water flux in FO operations. It is known that a hydrophilic substrate and a smaller membrane structure parameter (S) are effective against ICP. This paper reports the development of a thin film composite (TFC) FO membrane with a hydrophilic mineral (CaCO3)-coated polyethersulfone (PES)-based substrate. The CaCO3 coating was applied continuously and uniformly on the membrane pore surfaces throughout the TFC substrate. Due to the intrinsic hydrophilicity of the CaCO3 coating, the substrate hydrophilicity was significantly increased and the membrane S parameter was reduced to as low as the current best of cellulose-based membranes but without the mechanical fragility of the latter. As a result, the ICP of the TFC-FO membrane could be significantly reduced to yield a remarkable increase in water flux without the loss of membrane selectivity.
Source Title: Scientific Reports
URI: https://scholarbank.nus.edu.sg/handle/10635/175437
ISSN: 20452322
DOI: 10.1038/srep19593
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