The microstructure of hybrid silica gels and its modification by evaporative and supercritical dryings

Cédric J. Gommes; Silvia Blacher; Jean Paul Pirard; George W. Scherer

doi:10.1007/s10971-007-1626-7

The microstructure of hybrid silica gels and its modification by evaporative and supercritical dryings

Cédric J. Gommes, Silvia Blacher, Jean Paul Pirard, George W. Scherer

Civil & Environmental Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The effect of evaporative drying on the pore size of two series of hybrid silica gels is investigated by combining beam bending on the gels and mercury porosimetry on the aerogels and xerogels with transmission electron microscopy on the xerogels. It is shown that the shrinkage of the pores during drying is different in the two series: in one series the pores shrink proportionally to their volume, in the other the pores collapse until they all reach the same size. The experimental data enable us to discuss the relation between these two different behaviours and the different morphology of the two series of gels.

Original language	English (US)
Pages (from-to)	211-218
Number of pages	8
Journal	Journal of Sol-Gel Science and Technology
Volume	44
Issue number	3
DOIs	https://doi.org/10.1007/s10971-007-1626-7
State	Published - Dec 2007

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Biomaterials
Condensed Matter Physics
Materials Chemistry

Keywords

Aerogels
Beam-bending
Drying
Gels
Hybrid materials
Xerogels

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10.1007/s10971-007-1626-7

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title = "The microstructure of hybrid silica gels and its modification by evaporative and supercritical dryings",

abstract = "The effect of evaporative drying on the pore size of two series of hybrid silica gels is investigated by combining beam bending on the gels and mercury porosimetry on the aerogels and xerogels with transmission electron microscopy on the xerogels. It is shown that the shrinkage of the pores during drying is different in the two series: in one series the pores shrink proportionally to their volume, in the other the pores collapse until they all reach the same size. The experimental data enable us to discuss the relation between these two different behaviours and the different morphology of the two series of gels.",

keywords = "Aerogels, Beam-bending, Drying, Gels, Hybrid materials, Xerogels",

author = "Gommes, {C{\'e}dric J.} and Silvia Blacher and Pirard, {Jean Paul} and Scherer, {George W.}",

note = "Funding Information: Acknowledgements C.J.G. is a postdoctoral researcher of the Belgian National Fund for Scientific Research (FNRS). The authors are grateful to Dr. Arnaud Rigacci of the Ecole des Mines de Paris for his help with the supercritical drying of the gels. Part of this work was performed during a stay of C.J.G. at Princeton University, supported by the ExxonMobil Benelux Chemical Award 2004, by the Camille H{\'e}la Foundation of the University of Li{\`e}ge, and by the Patrimoine de l{\textquoteright}Universit{\'e} de Li{\`e}ge. This work was also supported by the National Funds for Scientific Research, Belgium, and by the R{\'e}gion Wallonne -Direction G{\'e}n{\'e}rale des Technologies de la Recherche et de l{\textquoteright}{\'E}nergie.",

year = "2007",

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doi = "10.1007/s10971-007-1626-7",

language = "English (US)",

volume = "44",

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journal = "Journal of Sol-Gel Science and Technology",

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AU - Gommes, Cédric J.

AU - Blacher, Silvia

AU - Pirard, Jean Paul

AU - Scherer, George W.

N1 - Funding Information: Acknowledgements C.J.G. is a postdoctoral researcher of the Belgian National Fund for Scientific Research (FNRS). The authors are grateful to Dr. Arnaud Rigacci of the Ecole des Mines de Paris for his help with the supercritical drying of the gels. Part of this work was performed during a stay of C.J.G. at Princeton University, supported by the ExxonMobil Benelux Chemical Award 2004, by the Camille Héla Foundation of the University of Liège, and by the Patrimoine de l’Université de Liège. This work was also supported by the National Funds for Scientific Research, Belgium, and by the Région Wallonne -Direction Générale des Technologies de la Recherche et de l’Énergie.

PY - 2007/12

Y1 - 2007/12

N2 - The effect of evaporative drying on the pore size of two series of hybrid silica gels is investigated by combining beam bending on the gels and mercury porosimetry on the aerogels and xerogels with transmission electron microscopy on the xerogels. It is shown that the shrinkage of the pores during drying is different in the two series: in one series the pores shrink proportionally to their volume, in the other the pores collapse until they all reach the same size. The experimental data enable us to discuss the relation between these two different behaviours and the different morphology of the two series of gels.

AB - The effect of evaporative drying on the pore size of two series of hybrid silica gels is investigated by combining beam bending on the gels and mercury porosimetry on the aerogels and xerogels with transmission electron microscopy on the xerogels. It is shown that the shrinkage of the pores during drying is different in the two series: in one series the pores shrink proportionally to their volume, in the other the pores collapse until they all reach the same size. The experimental data enable us to discuss the relation between these two different behaviours and the different morphology of the two series of gels.

KW - Aerogels

KW - Beam-bending

KW - Drying

KW - Gels

KW - Hybrid materials

KW - Xerogels

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JF - Journal of Sol-Gel Science and Technology

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ER -

The microstructure of hybrid silica gels and its modification by evaporative and supercritical dryings

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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