Characteristics of Alumina-Supported TiO2 Composite Ultrafiltration Membranes Prepared by the Sol-Gel Method

Sol-Gel 법으로 제조한 알루미나 담체의 $TiO_2$ 복합 한외여과막의 특성

  • 현상훈 (연세대학교 세라믹공학과) ;
  • 최영민 (연세대학교 세라믹공학과)
  • Published : 1992.02.01


Alumina supports for TiO2 ultrafiltration membrane coating were prepared by presintering disk-type preforms at 140$0^{\circ}C$. These supports showed uniform microstructures which had the apparent porosity of 40%, the pore size distribution in the range of 0.1~0.5${\mu}{\textrm}{m}$, and the water flux of 1400ι/$m^2$.h at the pressure difference of 10 atm. The optimum pH and concentration of the TiO2 sol for coating were 0.8 and 1.0 wt%, respectively, and sol particles were identified as rutile forms of 20 nm size. Crack-free alumina-supported rutile TiO2 membranes could be prepared through well controlled drying and heating the gel layer coated by the sol-gel dipping. The pore size of the TiO2 membranes heat-treated at 50$0^{\circ}C$ for 2 hrs was 30~80$\AA$, and their thickness varied from 1.1 to 3.8 ${\mu}{\textrm}{m}$ in accordence with the dipping time (4~40 min). The flux of water through this composite membrane at 10 atm was found to be in the range from 800 to 1100ι/$m^2$.hr depending on the dipping time (10~40 min). The membrane thickness increased linearly with the square root of the dipping time and the slope was 0.62 ${\mu}{\textrm}{m}$/{{{{ SQRT { min} }}.



  1. J. Membrane Sci v.10 The Growth of Membrane Technology H.K.Lonsdale
  2. J. of Membrane Sci. v.40 Mass Transfer in Corrugated-Plate Memberane Modules. I. Hyperfiltration Experiments M.J. Vander Waal;L.G. Racz
  3. Can. J. Chem. v.36 K. Graham;L C. Madeley
  4. Australian J. Chem. v.10 P.G. Johnasen;A.S. Buchanan
  5. J. Membrane Sci. v.24 The Preparation and Characterization of Alumina Membranes with Ultra-Fine Pores. Part 4 : Ultrafitration and Hyperfiltration Experiments A.F.M. Leenaars;K. Keizer;A.J. Burggraaf
  6. The Properties of Gasses and Liquids R.C. Reid;J.M. Prausnitz;T.K. Sherwood
  7. J. Koream Ceram Soc. v.23 no.5 Preparation of Microporous Glasses by the Phase-Separation Techniuque and Their Salt-Rejection Characteristics S H Hyun;G.T. Kim
  8. UK Patent Application v.GB 2 Porous Mullite T.R. Jones;C.Gould
  9. Membrane Separation Process P. Meares(ed.)
  10. J. Am. Ceram. Soc. v.65 no.12 Formation, Packing, and Sintering of Monodisperse TiO₂Powders E.A. Barringer;H.K. Bowen
  11. J. Membrane Sci. v.39 Inorganic Membranes Obtamed by Sol-Gel Techniques A. Larbot;J.P. Farbe;C. Guizard;L. Cot
  12. Le Lait v.64 Crossflow Microfiltration and Backflushing on Ceramic Membrane S. Galari;A. Wicker;J.P. Dumas;J. Gillot;D. Garcera
  13. J. Korean Ceram. Soc. v.25 no.3 Preparation of Al₂O₃-ZrO₂ Composite Powers by the Use of Emulsion :Ⅱ Emulsion Hot Kerosene Drying Method S.H. Hyun;J.K. Paik
  14. J. Cooouid Interface Sci. v.105 no.1 The Preparation and Characterization of Alumina Membranes with Ultrafine Pores Part 2 : The formation of Supported Membranes A.F.M. Leenaars;AJ. Burggraaf
  15. J. Membrane Sci. v.39 Titania and Alumina Ceramic Membranes M.A. Anderson;M.J. Gieselmann;Q. Xu
  16. J. Mater. Sci. v.19 The Preparation and Characterization of Alumina Membranes with Ultra-Fine Pores Part 1 : Microstructural Investigations on Non-Supported Membranes A.F.M. Leenaars;K. Keizer;AJ. Burggraaf
  17. Desalination v.53 Crossflow Microfiltration in the Process Industry T J. Van Gassel;S. Ripperger
  18. J. Membrane Sci. v.24 The Preparaion and Characterization of Alumina Membranes with Ultra-Fine Pores. Part 3 : The Permeability for Pure Liquids A.F.M. Leenaars;AJ. Burggraaf
  19. Food Technol v.38 Crossflow Microfiltration Technology and Its Applications DJ. Paulson;R.L. Wilson;D.D. Spatz
  20. Ultrastructure Processing of Advanced Ceramics Ultrafilters by the Sol-Gel Process L. Cot;A. Larbot;C. Guizard;John D. Mackenzie(ed.)
  21. J. Korea Ceram Soc. v.25 no.1 Preparation of Porous Glass Membranes by the Phase-Separation Technique S.H. Hyrn;B.H. Choi
  22. Desah-nation v.56 Membrane Separations Technology for Industrial Effluent Treatment-A Review P.S. Cartwright
  23. J. Membrane Sci. v.39 Special Issue on Ceramic Membranes R.L. Goldsmith
  24. Am. Chem. Soc. Materials Science of Synthetic Membrane D.R. Lloyd(ed.)
  25. Power v.130 Crossflow Membrane Filtration expands Role in Water Treatment G J. Gach
  26. J. Non-Cryst. Solids v.63 Generation of SiO₂-Membranes from Alkoxysilanes on Porous Supports A Kaiser.;H. Schmidt