Article (Scientific journals)
Freeze-dried resorcinol-formaldehyde gels
Blacher, Silvia; Pirard, René; Pirard, Jean-Paul et al.
1997In Journal of Non-Crystalline Solids, 212 (2-3), p. 250-261
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Abstract :
[en] The texture of resorcinol-formaldehyde gels, previously synthesized by Pekala et al. [1-6], but dried by freeze-drying was studied. The freeze-dried gels present a complex porous structure from nanometer to micrometer length-scale. Taking a standard freezing rate, we study in detail the influence of the molar ratio resorcinol/catalyst on the texture, This molar ratio is one of the parameters under consideration which can lead to a tailoring of the dried gel texture in order to develop adsorbents or catalyst supports of controlled porosity. Characterization methods include nitrogen adsorption-desorption (including the classical and the fractal interpretations), mercury porosimetry, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS).
Disciplines :
Materials science & engineering
Chemical engineering
Physics
Author, co-author :
Blacher, Silvia ;  Université de Liège - ULiège > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée
Pirard, René ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Chimie physique appliquée
Pirard, Jean-Paul ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Chimie physique appliquée
Sahouli, Bendida;  Université de Liège - ULiège
Brouers, François ;  Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Relations académiques et scientifiques (Sciences appliquées)
Mathieu, Bernard;  Université de Liège - ULiège > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée
Language :
English
Title :
Freeze-dried resorcinol-formaldehyde gels
Publication date :
1997
Journal title :
Journal of Non-Crystalline Solids
ISSN :
0022-3093
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
212
Issue :
2-3
Pages :
250-261
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 August 2009

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