Influence of TiO2 on the pore structure and texture of SiO 2-PDMS hybrid materials

Lucía Téllez, Juan Rubio, Miguel A. Vulenzuela, Fausto Rubio, Ernesto Morales, José L. Oteo

Producción científica: Contribución a una revistaArtículo de la conferenciarevisión exhaustiva

Resumen

Porous SiO2-PDMS-TiO2 hybrid materials have been prepared by the Sol-Gel method using tetraethoxysilane (TEOS), silanol terminated-Polydimethylsiloxane (PDMS) and tetrabuthylonotitanate (TBT) as precursors. These materials were characterized by means of nitrogen adsorption, mercury porosimetry and helium picnometry. It was found that the meso and microporosity are predominant in all samples. The influence of the TBT concentration in the final pore structure and texture of SiO2-PDMS- TiO2 hybrid materials was studied. Results showed that increasing the TBT concentration decreases the pore volume of micropores, mesopores and macropores. On the other hand the specific surface areas of meso and macropores decreases with increasing TBT content, but micropore areas increase with TBT. These results are assigned to the formation of ultramicropores when TBT is added. In addition, surface roughness is found to increase with TBT concentration which is attributed to the formation of hydrous titanium oxide based nanoparticles.

Idioma originalInglés
Número de artículoEE9.20
Páginas (desde-hasta)183-188
Número de páginas6
PublicaciónMaterials Research Society Symposium Proceedings
Volumen847
EstadoPublicada - 2005
Evento2004 Materials Research Society Fall Meeting - Boston, MA, Estados Unidos
Duración: 29 nov. 20042 dic. 2004

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