4.7 Article

Thin-film nanofibrous composite membranes containing cellulose or chitin barrier layers fabricated by ionic liquids

Journal

POLYMER
Volume 52, Issue 12, Pages 2594-2599

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2011.03.051

Keywords

Nanofibers; Polysaccharide membranes; Ultrafiltration

Funding

  1. Office of Naval Research [N000140310932]
  2. National Science Foundation [DMR-1019370]

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The barrier layer of high-flux ultrafiltration (UF) thin-film nanofibrous composite (TFNC) membranes for purification of wastewater (e.g., bilge water) have been prepared by using cellulose, chitin, and a cellulose-chitin blend, regenerated from an ionic liquid. The structures and properties of regenerated cellulose, chitin, and a cellulose chitin blend were analyzed with thermogravimetric analysis (TGA) and wide-angle X-ray diffraction (WAXD). The surface morphology, pore size and pore size distribution of TFNC membranes were determined by SEM images and molecular weight cut-off (MWCO) methods. An oil/water emulsion, a model of bilge water, was used as the feed solution, and the permeation flux and rejection ratio of the membranes were investigated. TFNC membranes based on the cellulose-chitin blend exhibited 10 times higher permeation flux when compared with a commercial UF membrane (PAN10, Sepro) with a similar rejection ratio after filtration over a time period of up to 100 h, implying the practical feasibility of such membranes for UF applications. (C) 2011 Elsevier Ltd. All rights reserved.

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