Titania foams were prepared by using titanium tetraisopropoxide (TTIP) as the alkoxide. Formide was used as the polar liquid and the triblock copolymer (ethylene glycol)20-(propylene glycol)70-(ethylene glycol)20 served as the surfactant. A solution of 1.75% by weight of the surfactant in FA served as the polar phase. The apolar phase was a mixture of titanium tetraisopropoxide, isooctane and silicon oil in different concentrations. Equal volumes of the two solutions were mixed in N2 atmosphere and agitated until a viscous emulsion formed. The emulsion was later exposed to the atmosphere. Water was supplied to the emulsion using a filter paper moistened with a few drops of water. Overall, this process enabled to produce titania foams that are highly porous and with a microstructure consisting of very thin spherical shells.
|Original language||English (US)|
|Number of pages||4|
|State||Published - Mar 4 1999|
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering