sol-gel; aerogel and solution chemistry; organic-inorganic hybrids
Abstract :
[en] Time-resolved small-angle X-ray scattering is used to follow in situ the structuring of silica sols and gels in various chemical conditions. The acid-catalyzed and base-catalyzed polymerizations of TEOS, as well as the copolymerization of TEOS with organically modified trialkoxysilanes, are followed. The analysis points to the diversity of the mechanisms that govern the structuring of the reacting solutions, and most notably to the important role of physical forces. (C) 2007 Elsevier B.V.All rights reserved.
Disciplines :
Chemical engineering Materials science & engineering
Author, co-author :
Gommes, Cédric ; Université de Liège - ULiège > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée
Goderis, Bart
Pirard, Jean-Paul ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Chimie physique appliquée
Blacher, Silvia ; Université de Liège - ULiège > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée
Language :
English
Title :
Branching, aggregation, and phase separation during the gelation of tetraethoxysilane
Publication date :
15 July 2007
Journal title :
Journal of Non-Crystalline Solids
ISSN :
0022-3093
Publisher :
Elsevier Science Bv, Amsterdam, Netherlands
Volume :
353
Issue :
24-25
Pages :
2495-2499
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
