ORBi: Blacher Silvia - Freeze-dried resorcinol-formaldehyde gels

Reference : Freeze-dried resorcinol-formaldehyde gels


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics Engineering, computing & technology : Chemical engineering Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/2268/20377

Title :	Freeze-dried resorcinol-formaldehyde gels
Language :	English
Author, co-author :	Blacher, Silvia [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 [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
	Sahouli, Bendida [Université de Liège - ULG > > > > > >]
	Brouers, François [Université de Liège - ULg > Services généraux (Faculté des sciences appliquées) > Relations académiques et scientifiques (Sciences appliquées) >]
	Mathieu, Bernard [Université de Liège - ULG > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Publication date :	1997
Journal title :	Journal of Non-Crystalline Solids
Publisher :	Elsevier Science
Volume :	212
Issue/season :	2-3
Pages :	250-261
Audience :	International
ISSN :	0022-3093
City :	Amsterdam
Country :	The Netherlands
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).
Permalink :	http://hdl.handle.net/2268/20377

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