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Water insertion in hydrophobic porous oxides

Published online by Cambridge University Press:  11 February 2011

D. Carrière ,
S. Sidis ,
K. Lahlil ,
M. Moreau ,
P. Barboux  and
J.-P. Boilot
D. Carrière
Affiliation:
Physique Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 Palaiseau, France
S. Sidis
Affiliation:
Physique Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 Palaiseau, France
K. Lahlil
Affiliation:
Physique Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 Palaiseau, France
M. Moreau
Affiliation:
Physique Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 Palaiseau, France
P. Barboux
Affiliation:
Physique Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 Palaiseau, France
J.-P. Boilot
Affiliation:
Physique Matière Condensée, UMR CNRS 7643, Ecole Polytechnique, 91128 Palaiseau, France
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Abstract

We have studied the synthesis of porous hydrophobic systems made from silica and zirconia. The silica systems have been grafted with alkyl-chlorosilanes. Alternative hydrophobic systems were also obtained by synthesis of colloidal monoclinic zirconia grafted with various alkyl phosphonates. The mechanism and the density of grafting were studied by solid state MAS NMR and nitrogen adsorption isotherms. The bulk thermodynamic properties of water are strongly dominated by the interfacial interactions at the surface of these porous solids. The penetration of water in these porous systems was studied by high pressure intrusion of water (water porosimetry between 0 and 100 MPa) into the hydrophobic pores. The amazing mechanical behavior of such water-porous body mixtures can find interesting applications for mechanical energy storage and dissipation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 755: Symposium DD – Solid-State Chemistry of Inorganic Materials IV , 2002 , DD3.7
Copyright
Copyright © Materials Research Society 2003

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References

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