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Non-ionic copolymer microgels as high-performance draw materials for forward osmosis desalination

Lookup NU author(s): Professor Sheng Dai

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Abstract

© 2018 Ionic thermo-responsive microgels have been recently developed as smart draw agents for forward osmosis (FO) desalination. Although ionic microgels are able to demonstrate high water flux, their water recovery performance is compromised due to strong hydration of ionic moieties. In this study, we design and explore various non-ionic thermo-responsive microgels as the FO draw materials. Among these microgels, the copolymer microgels of N-isopropylacrylamide and acrylamide show higher water recovery than ionic microgels, while maintaining high water flux, where the initial water flux and water recovery of the copolymer microgel with 5 wt% acrylamide reach 24.7 LMH and 78.7%. Hansen solubility parameter analysis is launched to theoretically elucidate the mechanism of non-ionic microgels as draw materials in FO operation. The prediction from solubility parameter analysis aligns well with experimental results. This work will guide us in the future development of high performance smart microgels as draw materials in FO desalination.

Publication metadata

Author(s): Hartanto Y, Zargar M, Cui X, Jin B, Dai S

Publication type: Article

Publication status: Published

Journal: Journal of Membrane Science

Year: 2019

Volume: 572

Pages: 480-488

Print publication date: 15/02/2019

Online publication date: 22/11/2018

Acceptance date: 19/11/2018

ISSN (print): 0376-7388

ISSN (electronic): 1873-3123

Publisher: Elsevier BV

URL: https://doi.org/10.1016/j.memsci.2018.11.042

DOI: 10.1016/j.memsci.2018.11.042

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