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Preparation and Characterization of Cellulosic Forward Osmosis Membranes  

Jeong, Bo-Reum (Environment & Resources Research Center, Korea Research Institute of Chemical Technology)
Kim, Jong-Hak (Department of Chemical & Biomolecular Engineering, Yonsei University)
Kim, Beom-Sik (Environment & Resources Research Center, Korea Research Institute of Chemical Technology)
Park, Yoo-In (Environment & Resources Research Center, Korea Research Institute of Chemical Technology)
Song, Du-Hyun (Environment & Resources Research Center, Korea Research Institute of Chemical Technology)
Kim, In-Chul (Environment & Resources Research Center, Korea Research Institute of Chemical Technology)
Publication Information
Membrane Journal / v.20, no.3, 2010 , pp. 222-227 More about this Journal
Abstract
The purpose of this study is to prepare forward osmosis (FO) membranes using a variety of cellulose-based polymers and to evaluate the performance of difference depending on each of the polymers and additives. Forward osmosis membranes based on cellulose acetate (CA) and cellulose triacetate (CTA) were prepared through phase inversion. The performance of FO membranes developed, such as flux and salt rejection, was compared under the osmotically- and pressure-driven conditions. In CA FO membranes, the execution time of solvent evaporation and membrane annealing induced the change in membrane performance. But the performance of CTA FO membrane was improved by using additives rather than annealing. Moreover, the flux of CTA FO membrane was $4.46\;L/m^2hr$ but that of CA/CTA FO membrane was $8.89\;L/m^2hr$ in FO mode. The CTA FO membrane with blending CA was more efficient to increase FO permeate flow rather than using a single polymer membrane.
Keywords
forward osmosis membrane; cellulose acetate; cellulose triacetate;
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