• Author: Zhao, Yang, Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Qiu, Changquan, Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Li, Xuesong, Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Vararattanavech, Ardcharaporn, Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Shen, Wenming, Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Torres, Jaume, Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Helix Nielsen, Claus

    Biophysics and complex systems, Department of Physics, Technical University of Denmark, Fysikvej, 2800, Kongens Lyngby, Denmark

  • Author: Wang, Rong, Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Hu, Xiao, Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Fane, Anthony G., Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

  • Author: Tang, Chuyang Y., Singapore

    Singapore Membrane Technology Center, Nanyang Technological University, Singapore

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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 (∼4L/m2hbar) with comparable NaCl rejection (∼97%) at an applied pressure of 5bar. Its permeability was ∼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.

Original languageEnglish
JournalJournal of Membrane Science
Publication date2012
Volume423-424
Pages422-428
ISSN0376-7388
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 12

Keywords

  • Aquaporin, Biomimetic membranes, Reverse osmosis, Interfacial polymerization, Thin film composite
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