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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2018.28.3.180

Separation of Low Molecular Weight of Dye from Aqueous Solution Using the Prepared Nano-composite Hollow Fiber Membranes  

Park, Cheol Oh (Department of Advanced Materials and Chemical Engineering, Hannam University)
Lee, Sung Jae (Department of Advanced Materials and Chemical Engineering, Hannam University)
Rhim, Ji Won (Department of Advanced Materials and Chemical Engineering, Hannam University)
Publication Information
Membrane Journal / v.28, no.3, 2018 , pp. 180-186 More about this Journal
Abstract
The nano-composite membranes were prepared onto the polyvinylidene fluoride (PVDF) hollow fiber membranes through twice dip-coating known layer-by-layer method. For the first coating, poly(vinylsulfonic acid, sodium salt)(PVSA) and Poly(styrene sulfonic acid)(PSSA) were used with varying the concentration and ionic strength (IS) and the poly(ethyleneimine)(PEI) as the second coating material was fixed at 10,000 ppm and IS = 0.3. To characterize the prepared nano-composite membranes, the permeabilities and rejection ratio were measured for each 100 ppm NaCl, $CaSO_4$, $MgCl_2$, and 25 ppm MO aqueous solution. The rejections were increased as the concentrations of coating materials increased. And it was confirmed that the salt rejections for PSSA as the coating material were higher than for PVSA. Typically, the permeability, 1.848 LMH and the rejection for MO 76.3% were obtained at the coating conditions of PSSA 30,000 ppm and I.S = 1.0.
Keywords
nanofiltration; polyvinylidene fluoride (PVDF); poly(vinylsulfonic acid)(PVSA); poly(vinylsulfonic acid; sodium salt)(PSSA); Ionic Strength;
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