Academic Journal
Synthesis of high flux forward osmosis membranes by chemically crosslinked layer-by-layer polyelectrolytes
| العنوان: | Synthesis of high flux forward osmosis membranes by chemically crosslinked layer-by-layer polyelectrolytes |
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| المؤلفون: | Qi, S, Qiu, C, Tang, CY |
| بيانات النشر: | //www.elsevier.com/locate/memsci Netherlands |
| سنة النشر: | 2011 |
| المجموعة: | University of Hong Kong: HKU Scholars Hub |
| مصطلحات موضوعية: | Chemical Crosslinking, Forward Osmosis (Fo), Internal Concentration Polarization, Layer-By-Layer (Lbl) Assembly, Polyelectrolyte Deposition |
| الوصف: | Forward osmosis (FO) membranes were successfully fabricated using layer-by-layer (LbL) assembly of poly(allylamine hydrochloride) (PAH) and poly(sodium 4-styrene-sulfonate) (PSS) on a porous polyacrylonitrile (PAN) substrate. In addition, chemical crosslinking of LbL polyelectrolyte layers was performed with glutaraldehyde (GA). The resultant crosslinked (the xLbL series) and non-crosslinked (the LbL series) membranes were characterized in terms of the substrate morphology and structure, the separation layer water permeability and salt rejection, and the FO water flux and solute flux performance. Both LbL and xLbL membranes had relatively high water permeability (∼ or >7.0L/m 2hbar). On the other hand, the crosslinked xLbL membranes showed better and more stable MgCl 2 rejection, leading to a relatively low FO solute reverse transport (the solute flux over water flux ratio<6mM regardless of draw solution (DS) concentration and membrane orientation). High FO water fluxes were achieved for both crosslinked and non-crosslinked membranes, where a thin substrate with finger-like pores were adopted to minimize internal concentration polarization in the porous support layer. The crosslinked membrane xLbL3 (with 3 PAH/PSS deposition layers) had an FO water flux of ∼100L/m 2h in the active-layer-facing-DS orientation using a 2 or 3M MgCl 2 draw solution and distilled water as the feed water, which clearly demonstrates the potential of LbL membranes for high flux FO applications. © 2011 Elsevier B.V. ; link_to_subscribed_fulltext |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0376-7388 |
| Relation: | Journal of Membrane Science; http://www.scopus.com/mlt/select.url?eid=2-s2.0-80052028969&selection=ref&src=s&origin=recordpage; Journal Of Membrane Science, 2011, v. 381 n. 1-2, p. 74-80; 80; WOS:000295564600008; 1-2; eid_2-s2.0-80052028969; 74; http://hdl.handle.net/10722/185407; 381 |
| DOI: | 10.1016/j.memsci.2011.07.013 |
| الاتاحة: | https://doi.org/10.1016/j.memsci.2011.07.013 http://hdl.handle.net/10722/185407 |
| رقم الانضمام: | edsbas.DB7D9842 |
| قاعدة البيانات: | BASE |
| تدمد: | 03767388 |
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| DOI: | 10.1016/j.memsci.2011.07.013 |