화학공학소재연구정보센터
Journal of Membrane Science, Vol.325, No.2, 546-552, 2008
Preparation of titania microfiltration membranes supported on porous Ti-Al alloys
A TiO2 membrane supported on a planar porous Ti-Al alloy was prepared by combination of electrophoretic deposition and dip-coating. In the electrophoretic deposition process, the membrane thickness increased linearly with the square root of the deposition time, while increased with decrease of the suspension viscosity. The perfect TiO2/Ti-Al composite membrane was obtained by further dipcoating modification. SEM images showed that the surface of the membrane was defect-free. XRD result indicated that rutile TiO2 still remained in the membrane bulk as the main phase, while a new phase titanium oxides with the form of TixOy, where y is less than 2x, was also observed. The supported TiO2/Ti-Al composite membrane had an average pore size of 0.28 mu m, a thickness of 40 mu m or so and a pure water flux of 3037 L m(-2) h(-1) bar(-1). (C) 2008 Published by Elsevier B.V.