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Author

Kwon, Young-Nam
Superior Membrane-based Advanced Research & Technology (SMART) Lab
Research Interests
  • Membrane, Reverse(Forward) osmosis, Membrane distillation, Hydrate-induced ice desalination

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Surface modification of a polyamide reverse osmosis membrane for chlorine resistance improvement

Cited 10 times inthomson ciCited 12 times inthomson ci
Title
Surface modification of a polyamide reverse osmosis membrane for chlorine resistance improvement
Author
Kwon, Young-NamHong, SungpyoChoi, HyoungwooTak, Taemoon
Keywords
Analytical tool; Chlorine stability; Coating layer; Coating polymers; Coating solution; In-situ polymerization; Interfacial polymerization; Membrane surface; Preparation conditions; Salt rejections; Smooth surface; Surface-modified; Thin-film composite membrane; X-ray photoelectron microscopy; Zeta potential analyzers
Issue Date
201210
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v.415, no., pp.192 - 198
Abstract
A surface modified polyamide (PA) thin film composite (TFC) membrane was prepared using in-situ polymerization of sorbitol polyglycidyl ether (SPGE) on the membrane surface immediately after interfacial polymerization of TFC membranes. This modification was conducted to protect the chlorine-sensitive sites of the PA membrane using a chlorine-resistant hydrophilic SPGE polymer. The optimum preparation condition of the modified PA TFC reverse osmosis membranes was investigated, and then the successful modification of the membrane was confirmed using various analytical tools including Fourier transform infrared spectroscopy, a zeta potential analyzer, a contact angle analyzer, X-ray photoelectron microscopy, scanning electron microscopy, and atomic force microscopy. The modification converted the surface of the membrane to a more neutral, hydrophilic, and smooth surface. With increasing SPGE concentration in the coating solution, molecular overlapping of the coating polymer led to a denser coating layer, which resulted in declined flux but increased salt rejection. Chlorination tests showed that the modification of the membrane using SPGE ring-opening polymerization improved chlorine stability.
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DOI
http://dx.doi.org/10.1016/j.memsci.2012.04.056
ISSN
0376-7388
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