| 초록 |
A new method to synthesize ordered macroporous ceramic materials by sol-gel reaction of titanium isopropoxide in scCO2 by use of three-dimensional latex array templates is presented. TiO2 inverse opals were produced in supercritical carbon dioxide with 3D PS(Polystyrene) latex arrays as templates. The polymeric templates were reacted with Titanium isopropoxide(Ti(OPri)4) used as precursors of titania and Ethanol in scCO2 at certain Conditions. The inverse opal materials obtained after calcinations of the template. The porosity of the materials obtained for each template is different. Furthermore, shrinkage of the network upon condensation in scCO2 was small. The synthesis of inverse opals in scCO2 overcomes some of the limitations of the liquid-phase techniques, being a faster method of synthesis and, at the same time, rendering materials of unique properties. |
