Hydrophilic modification of feed spacer and its impacts on antifouling performance of reverse osmosis membrane

Tan, J. X. and Foo, K. and Lau, W. J. and Chua, S. F. and Mohd Hasbi, Ab Rahim and A. L., Ahmad and Liang, Y. Y. (2024) Hydrophilic modification of feed spacer and its impacts on antifouling performance of reverse osmosis membrane. Asia-Pacific Journal of Chemical Engineering, e3134. pp. 1-11. ISSN 1932-2135. (Published)

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Abstract

Feed spacers improve mixing and mass transfer in membrane modules. However, they also lead to foulant deposition in the vicinity of the spacer surface. In this paper, two hydrophilic monomers, namely, acrylic acid (AA) and 2-hydroxyethyl methacrylate (HEMA), are respectively coated on the surface of a commercial feed spacer via a plasma-enhanced chemical vapor deposition (PECVD) method. The resulting modified spacers are then evaluated alongside with a reverse osmosis (RO) membrane for its solute rejection, water permeability, and antifouling properties. Results show that the surface hydrophilicity of feed spacers has been enhanced upon the AA and HEMA deposition. During filtration test, the HEMA-modified spacer demonstrates higher flux recovery rate (94.17%) and salt rejection (95.78%) for the RO membrane. In contrast, the membrane with the unmodified spacer only shows 89.44% and 92.46%, respectively. Additionally, the membrane with the HEMA-modified spacer has a thinner fouling layer (200 nm) compared to the unmodified spacer (700 nm). The HEMA-coated spacer outperforms all the tested spacers, demonstrating that feed spacer modification with a hydrophilic monomer via the PECVD method can effectively reduce membrane fouling.

Item Type:	Article
Uncontrolled Keywords:	Antifouling; Coating; Desalination; Feed spacer; Reverse osmosis
Subjects:	Q Science > Q Science (General) T Technology > TP Chemical technology
Faculty/Division:	Faculty of Industrial Sciences And Technology Institute of Postgraduate Studies Faculty of Chemical and Process Engineering Technology
Depositing User:	Mrs Norsaini Abdul Samat
Date Deposited:	05 Aug 2024 04:36
Last Modified:	05 Aug 2024 04:36
URI:	http://umpir.ump.edu.my/id/eprint/42163
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