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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2018.28.1.21

Fabrication and Characterization of Alumina Hollow Fiber Ultrafiltration Membrane  

Kim, Yeo-Jin (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
Kim, Seong-Joong (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
Kim, Jeong (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
Cho, Young-Hoon (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
Park, Hosik (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
Lee, Pyung-Soo (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
Park, You-In (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
Park, Ho-Bum (Department of Energy Engineering, Hanyang University)
Nam, Seung-Eun (Membrane Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT))
Publication Information
Membrane Journal / v.28, no.1, 2018 , pp. 21-30 More about this Journal
Abstract
In this study, homogeneous and defect-free ceramic ultrafiltration membranes were fabricated by using the sol-gel method. A boehmite sol was synthesized and coated onto the surface of alumina hollow fiber microfiltration membranes. The effect of sol viscosity and surface tension on the coating layer homogeneity and thickness was investigated. The optimum coating repetition using pristine sol was determined to be 3 times, as the samples coated more than 4 times showed delamination. Fixing the coating repetition to 3 times, the effect of sintering temperature was also studied in this work. The samples sintered at $1000^{\circ}C$ exhibited the highest pure water permeability with the molecular weight cut-off (MWCO) of approximately 51 kDa (10 nm dextran), and the samples sintered at 600, $800^{\circ}C$ displayed the MWCO of 12 kDa (5 nm dextran). The ultrafiltration membranes prepared in this work showed competitive performance compared to the reported ceramic ultrafiltration membranes.
Keywords
ceramic; ultrafiltration; sol-gel; dip coating;
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