Abstract: A novel method to prepare macroporous TiO2 ceramic, based on membrane emulsification was
reported. To solve the paradox between the instability of nonaqueous emulsion and long
emulsification time required by the membrane emulsification, a two-stage ceramic membrane
jet-flow emulsification was proposed. Discussion was conducted on the evolution of droplet
size with time, which followed the Ostwald ripening theory. And a monodis-persed nonaqueous
emulsion with an average droplet size of 1.6μm could be prepared. Using the emulsion as a
template, TiO2 ceramics with an average pore size of 1.1μm were obtained. The material
could be prospectively used for preparation of catalysts, adsorbents, and membranes.

Key words: nonaqueous emulsion, ceramic, membrane emulsification, jet-flow

摘要： A novel method to prepare macroporous TiO2 ceramic, based on membrane emulsification was
reported. To solve the paradox between the instability of nonaqueous emulsion and long
emulsification time required by the membrane emulsification, a two-stage ceramic membrane
jet-flow emulsification was proposed. Discussion was conducted on the evolution of droplet
size with time, which followed the Ostwald ripening theory. And a monodis-persed nonaqueous
emulsion with an average droplet size of 1.6μm could be prepared. Using the emulsion as a
template, TiO2 ceramics with an average pore size of 1.1μm were obtained. The material
could be prospectively used for preparation of catalysts, adsorbents, and membranes.

关键词: nonaqueous emulsion;ceramic;membrane emulsification;jet-flow