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 themembrane emulsification, a two-stage ceramic membrane jet-flow emulsification .was. proposed. Discussion wasconducted on the evolution of droplet size with time, which followed the Ostwalcl npemng theory. And a monodispersed nonaqueous emulsion with an average droplet size of 1.6μm could beprepared. Using the emulsion, as atemplate, TiO2 ceramics with an average pore size ot 1.1 μm were obtaineed. Tne material could be prospectivelyused for preparation of catalysts, adsorbents, and membranes.
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.
基金
Supported by the National High Technology Research and Development Program of China （863 program, No.2006AA03Z534）, the Postdoctoral Science Foundation of China （No.20060400927）, the National Basic Research Program of China （No.2003CB6157070）, the National Natural Science Foundation of China （No.20436030）, Natural Science Foundation of Jiangsu Province （No.BK2006566）, and Jiangsu Planned Projects for Postdoctoral Research Funds （No.0601023B）.
