TY - JOUR
T1 - Influence of TiO2 on the pore structure and texture of SiO 2-PDMS hybrid materials
AU - Téllez, Lucía
AU - Rubio, Juan
AU - Vulenzuela, Miguel A.
AU - Rubio, Fausto
AU - Morales, Ernesto
AU - Oteo, José L.
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=28844449688&partnerID=8YFLogxK
M3 - Artículo de la conferencia
AN - SCOPUS:28844449688
SN - 0272-9172
VL - 847
SP - 183
EP - 188
JO - Materials Research Society Symposium Proceedings
JF - Materials Research Society Symposium Proceedings
M1 - EE9.20
T2 - 2004 Materials Research Society Fall Meeting
Y2 - 29 November 2004 through 2 December 2004
ER -