Fast-responsive monolithic hydrogels as draw agent for forward osmosis membrane process

A monolithic copolymer hydrogel was synthesised by polymerising n-isopropylacrylamide and sodium acrylate in the presence of poly(sodium 4-styrenesulfonate) (PSSS) chains and studied as potential draw agent for forward osmosis (FO) process. The monolithic hydrogel synthesised from 19% NIPAM, 1% SA,...

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Bibliographic Details
Published in:Separation science and technology 2017-11, Vol.52 (16), p.2583-2590
Main Authors: Tu, Kha L., Simon, George P., Wang, Huanting
Format: Article
Language:English
Subjects:
Chemical synthesis
Fluctuations
Flux
Forward osmosis
hydrogel
Hydrogels
Isopropylacrylamide
membrane process
Osmosis
Sodium
Swelling pressure
Water
Water transport
water treatment
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Summary:A monolithic copolymer hydrogel was synthesised by polymerising n-isopropylacrylamide and sodium acrylate in the presence of poly(sodium 4-styrenesulfonate) (PSSS) chains and studied as potential draw agent for forward osmosis (FO) process. The monolithic hydrogel synthesised from 19% NIPAM, 1% SA, and 15% PSSS at 60°C generated higher FO water flux and higher recovery rate than other hydrogels, due to improved membrane-hydrogel contact and water transport. In particular, the synthesised hydrogel draw agent achieved twice water flux compared with the particles. The monolithic hydrogel containing a smaller amount of water produced a higher water flux due to its high swelling pressure.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2017.1310237