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J. Korean Ceram. Soc. > Volume 51(4); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(4): 337.
doi: https://doi.org/10.4191/kcers.2014.51.4.337
베마이트를 이용한 UF 세라믹 분리막의 제조
위인희, 신동욱1, 한규성, 김진호, 조우석, 황광택
한국세라믹기술원 이천분원
1한양대학교 신소재공학과
Fabrication of Boehmite-based UF Ceramic Membrane
In-Hee Wi, Dong-Wook Shin1, Kyu-Sung Han, Jin-Ho Kim, Woo-Seok Cho, Kwang-Taek Hwang
Icheon Branch, Korea Institute of Ceramic Engineering and Technology
1Division of Materials Science and Engineering, Hanyang University
ABSTRACT
A single layer ultrafiltration(UF) ceramic membrane was prepared using boehmite sol. Boehmite was synthesized using a typical sol-gel process with optimization of the viscosity, pH, molar ratio of aluminum isopropoxide(AIP) and $HNO_3$. Boehmite sol was coated on a microfiltration(MF) support using the dip-coating method. MF support was dipped into the boehmite sol with a withdrawal speed of 5 mm/s and was maintained for 10 s in the boehmite sol, resulting in a uniform UF membrane layer of $10{mu}m$ thickness. The porosity of the obtained membrane was measured and found to be 41.2%; the pore size was found to range from 80~100 nm, corresponding to the pore size of the UF membrane. The flux of the obtained membrane was initially 540 $L/m^2h$ and approximately 85% of the initial flux was recovered using a periodic back-flushing process.
Key words: Ceramic membrane, Boehmite, Ultrafiltration, Sol-gel
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