Title: In situ SAXS analysis of silica gel formation with an additive
Authors: Gommes, C ×
Blacher, S
Goderis, Bart
Pirard, R
Heinrichs, B
Alie, C
Pirard, JP #
Issue Date: Jan-2004
Publisher: Amer chemical soc
Series Title: Journal of physical chemistry b vol:108 issue:26 pages:8983-8991
Abstract: Time-resolved small-angle X-ray scattering (SAXS) measurements performed during the formation of tetraethyl orthosilicate (TEOS) based silica gels in alcohol with 3-(2-aminoethylamino)propyltrimethoxysilane (EDAS) as an additive are reported. The measurements reveal no discontinuity of the nanostructure at the gel point. A chemically induced spinodal phase separation is found to give a coherent picture of the collected data. Increasing the amount of EDAS induces the phase separation on a smaller length scale, which finally leads to a modified gel morphology. The SAXS measurements and the electron micrographs associated with the dry gels could be interpreted in terms of the suggested wet gel formation mechanism.
ISSN: 1520-6106
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Polymer Chemistry and Materials
× corresponding author
# (joint) last author

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