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Preparation and Characterization of PSF Membranes by Phosphoric Acid and 2-Butoxyethanol  

Kim, Nowon (Department of Environmental Engineering, Dong-Eui University)
Publication Information
Membrane Journal / v.22, no.3, 2012 , pp. 178-190 More about this Journal
Abstract
Flat sheet membranes were prepared with polysulfone (PSF) by an immersion precipitation phase inversion method. Membranes were prepared with PSF/N-methylpyrrolidone (NMP)/polyvinylpyrrolidone (PVP)/phosphoric acid casting solution and water coagulant. By using the successive process of the vapor-induced phase inversion (VIPS) followed by the nonsolvent-induced phase inversion (NIPS), the effect of phosphoric acid addition to casting solution on morphology and permeability of membrane was studied. The mean pore size, the porosity, and the water flux of membranes were increased by the addition of small amount of phosphoric acid. Furthermore, the morphology of the prepared membranes were changed from a dense sponge-like structure to highly enhanced asymmetric structure. PSF/NMP/PVP/phosphoric acid/2-butoxyethanol (BE) casting solution were prepared and cast the successive VIPS-NIPS process with same experimental condition. Due to the addition of BE to casting solution, the mean pore size and almost 0.1 ${\mu}m$ and the water flux increased about 10 to 12 $L/cm^2{\cdot}min{\cdot}bar$.
Keywords
phase inversion; microfiltration; phosphoric acid; 2-butoxyethanol; polysulfone;
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Times Cited By KSCI : 1  (Citation Analysis)
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