Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/156977
Title: Use of rigid cucurbit[6]uril mediating selective water transport as a potential remedy to improve the permselectivity and durability of reverse osmosis membranes
Authors: Lee, Jaewoo 
Zhou, Feng
Baek, Kangkyun
Kim, Wooram
Su, Haibin
Kim, Kimoon
Wang, Rong
Bae, Tae-Hyun
Keywords: Engineering::Civil engineering
Issue Date: 2021
Source: Lee, J., Zhou, F., Baek, K., Kim, W., Su, H., Kim, K., Wang, R. & Bae, T. (2021). Use of rigid cucurbit[6]uril mediating selective water transport as a potential remedy to improve the permselectivity and durability of reverse osmosis membranes. Journal of Membrane Science, 623, 119017-. https://dx.doi.org/10.1016/j.memsci.2020.119017
Project: 1501-IRIS-04 
Journal: Journal of Membrane Science 
Abstract: In spite of many efforts to grasp the nature of porous nanomaterials, it is hard to find research work addressing empirical evidence for selective water permeation through their channels or pores. Herein, we report the experimental proof of selective water permeation through cucurbit[6]uril (CB[6]) with a portal diameter of 3.9 Å along with quantum mechanics calculation results elucidating the mechanisms underlying the selective water transport. CB[6] improved the water/salt permselectivity of CB[6]-polyamide thin-film nanocomposite (CB[6]-TFN) membranes since ion passage was inhibited by a high energy barrier imposed by the CB[6]’s portals while the portals are energetically favorable from the perspective of water transport. This difference in water and salt's permeabilities stems from its carbonyl-fringed portals, which are cut out for size exclusion and negatively charged for charge repulsion. Due to the rigidity, CB[6]-TFN membranes were found to be more resistant to compaction under elevated pressures. Such unique characteristics of CB[6] allowed CB[6]-TFN membranes to outperform newly developed TFN membranes as well as commercial RO membranes.
URI: https://hdl.handle.net/10356/156977
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2020.119017
Rights: © 2020 Elsevier B.V All rights reserved. This paper was published in Journal of Membrane Science and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20230408
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
MSE Journal Articles
NEWRI Journal Articles

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