Article (Scientific journals)
Condensation-Induced Decrease of Small-Angle X-ray Scattering Intensity in Gelling Silica Solutions
Gommes, Cédric; Pirard, Jean-Paul; Goderis, Bart
2010In Journal of Physical Chemistry. C, Nanomaterials and interfaces, 114, p. 17350–17357
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Keywords :
SAXS; Silica gels; condensation
Abstract :
[en] We propose a mathematical modeling of the total SAXS intensity in silica sol-gel processes in terms of hydrolysis and condensation reactions, as well as of microsyneresis. The results are used to rationalize previously published SAXS data of TEOS solutions reacting with organically modified trialkoxysilanes. We notably show that the decrease in SAXS intensity reported for these samples at the end of gelation is a consequence of condensation reactions. The water released by the latter reactions contributes to reduce the electron density difference between the silica and the solvent phases of the gels
Disciplines :
Physics
Chemistry
Author, co-author :
Gommes, Cédric  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Pirard, Jean-Paul ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Goderis, Bart;  Katholieke Universiteit Leuven - KUL
Language :
English
Title :
Condensation-Induced Decrease of Small-Angle X-ray Scattering Intensity in Gelling Silica Solutions
Publication date :
2010
Journal title :
Journal of Physical Chemistry. C, Nanomaterials and interfaces
ISSN :
1932-7447
eISSN :
1932-7455
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
114
Pages :
17350–17357
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 16 November 2010

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