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Preparation of Composite Membranes Via PVA/PAM Solution Coating onto Hydrophilized PVDF Hollow Fiber Membrane and Their Pervaporation Separation of Water-ethanol Mixture  

Kim, Ji Seon (Department of Chemical Engineering, Hannam University)
Park, Chae Young (Department of Chemical Engineering, Hannam University)
Park, Hun Whee (ENE Co. Ltd.)
Seo, Chang Hee (ENE Co. Ltd.)
Rhim, Ji Won (Department of Chemical Engineering, Hannam University)
Publication Information
Membrane Journal / v.23, no.4, 2013 , pp. 312-318 More about this Journal
Abstract
Poly vinylidene fluoride (PVDF) hollow fiber membranes were hydrophilized using polyethylenimine (PEI) and p-xylylene dichloride (XDC), and poly(vinyl alcohol) (PVA) and poly (acrylic acid -co- maleic acid) (PAM) mixed solutions by varying the concentration of PAM were coated onto PVDF membrane surface. The surface coating was verified by the observation of scanning electron microscope (SEM) and the permselective characteristcs of the resulting composite membranes were tested for 90 wt% aqueous ethanol solution by the pervaporation technique. The effects of the corsslinking agent concentraion, the temperature of feed solution, and the reaction temperature on the flux and separation factors were measured. Typically, the flux, $1,480g/m^2hr$ at the reaction temperature $100^{\circ}C$, PAM 3 wt%, feed temperature $70^{\circ}C$ was obtained, on the other hand, for the separation factor, ${\alpha}_{W/E}=82$ at the conditions of the reaction temperature $100^{\circ}C$, PAM 15 wt% and feed temperature $25^{\circ}C$ was shown.
Keywords
Poly vinylidene fluoride (PVDF); poly(vinylalcohol) (PVA); Poly(acrylic acid-co-maleic acid) (PAM); water-ethanol; pervaporation;
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