Reference : Multigram scale synthesis and characterization of low-density silica xerogels
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Chemical engineering
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/19812
Multigram scale synthesis and characterization of low-density silica xerogels
English
Alié, Christelle mailto [Université de Liège - ULg > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Tcherkassova, Natalia mailto [Centre Hospitalier Universitaire de Liège - CHU > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Ferauche, Fabrice [Université de Liège - ULG > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Lambert, Stéphanie mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Heinrichs, Benoît mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Pirard, René [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Pirard, Jean-Paul mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
1-Aug-2006
Journal of Non-Crystalline Solids
Elsevier Science Bv
352
26-27
2763-2771
Yes (verified by ORBi)
International
0022-3093
Amsterdam
[en] porosity ; silica ; sol-gels (xerogels)
[en] The synthesis of silica with preserved porosity and tailored morphology by sol-gel process can be achieved by hybrid organic-inorganic synthesis: a modified alkoxide, viz. 3-(2-aminoethylamino)propyltrimethoxysilane (EDAS), is introduced during the base catalysed synthesis with TEOS as main silica precursor. Additives with methoxy groups induce a nucleation mechanism because of their higher reactivity compared to main reagents with ethoxy groups. The nucleation model presented in previous papers was refined by taking into account the porosity of the particles and calculating the number of additive molecules by nucleus for each value of the ratio of additive/main reagent. The extrapolation of the synthesis process to semi-industrial scale goes through the replacement of laboratory grade reagents by industrial grade reagents and the scaling up to the production of higher quantities. At each of these two steps, the morphology and porosity of the samples has been compared to those of laboratory grade samples. It was shown that the texture and particle size has quasi totally been preserved. (c) 2006 Elsevier B.V. All rights reserved.
http://hdl.handle.net/2268/19812
also: http://hdl.handle.net/2268/20051

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