期刊
JOURNAL OF MEMBRANE SCIENCE
卷 423, 期 -, 页码 422-428出版社
ELSEVIER
DOI: 10.1016/j.memsci.2012.08.039
关键词
Aquaporin; Biomimetic membranes; Reverse osmosis; Interfacial polymerization; Thin film composite
资金
- Singapore National Research Foundation under its Environmental & Water Technologies Strategic Research Programme
- Environment & Water Industry Programme Office (EWI) of the PUB [651/06/169]
- Singapore Economic Development Board
Aquaporins are water channel proteins with excellent water permeability and solute rejection, which makes them promising for preparing high-performance biomimetic membranes. Despite the growing interest in aquaporin-based biomimetic membranes (ABMs), it is challenging to produce robust and defect-free ABMs that can be easily scaled up. In the current study, a thin film composite (TFC) ABM was prepared by the interfacial polymerization method, where AquaporinZ-containing proteoliposomes were added to the m-phenylene-diamine aqueous solution. Control membranes, either without aquaporins or with inactive (mutant) aquaporins, were also similarly prepared. The separation performance of these membranes was evaluated by cross-flow reverse osmosis (RO) tests. Compared to the controls, the active ABM achieved significantly higher water permeability (similar to 4 L/m(2) h bar) with comparable NaCl rejection (similar to 97%) at an applied pressure of 5 bar. Its permeability was similar to 40% higher compared to a commercial brackish water RO membrane (BW30) and an order of magnitude higher compared to a seawater RO membrane (SW30HR), which clearly demonstrates the great potential of the TFC ABM for desalination applications. (c) 2012 Elsevier B.V. All rights reserved.
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