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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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Change of membrane performance due to chlorination of crosslinked polyamide membranes

Cited 19 times inthomson ciCited 15 times inthomson ci
Title
Change of membrane performance due to chlorination of crosslinked polyamide membranes
Author
Kwon, Young-NamTang, Chuyang Y.Leckie, James O.
Keywords
Chlorine; Crosslinked polyamide; Degradation; Performance; RO membrane
Issue Date
200612
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF APPLIED POLYMER SCIENCE, v.102, no.6, pp.5895 - 5902
Abstract
A systematic investigation of the relationship between chlorine exposure of a thin film composite crosslinked polyamide membrane (LE membrane, FilmTec (c)) and changes in membrane performance (water flux and salt rejection) is discussed here. Performance change of crosslinked polyamide membranes due to chlorination depended on pH and concentration of chlorine in the soaking bath. Membranes chlorinated at low pH and high chlorine concentration showed flux decreases at an early stage of filtration and then increases with filtration time. On the other hand, membranes chlorinated at high pH and low chlorine concentration showed flux increases at an early stage and then decreases with filtration time. Performance of chlorinated polyamide membranes was determined by the balance between rearrangement of polymer chains and the distortion of the chains due to chlorination. A conceptual model of performance change was proposed consistent with the chlorination of polyamide membranes.
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DOI
http://dx.doi.org/10.1002/app.25071
ISSN
0021-8995
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