Issue 32, 2008
From the journal:

Physical Chemistry Chemical Physics

Thermodynamics of water intrusion in nanoporous hydrophobic solids

Fabien Cailliez,a   Mickael Trzpit,b   Michel Soulard,b   Isabelle Demachy,c   Anne Boutin,c   Joël Patarinb  and  Alain H. Fuchs*a  

* Corresponding authors

a Ecole nationale supérieure de chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie-Paris 6, France
E-mail: alain.fuchs@enscp.fr

b Ecole nationale supérieure de chimie de Mulhouse, Université de Haute Alsace and CNRS, Mulhouse, France

c Université Paris-Sud and CNRS, Orsay, France

Abstract

We report a joint experimental and molecular simulation study of water intrusion in silicalite-1 and ferrerite zeolites. The main conclusion of this study is that water condensation takes place through a genuine first-order phase transition, provided that the interconnected pores structure is 3-dimensional. In the extreme confinement situation (ferrierite zeolite), condensation takes place through a continuous transition, which is explained by a shift of both the first-order transition line and the critical point with increasing confinement. The present findings are at odds with the common belief that conventional phase transitions cannot take place in microporous solids such as zeolites. The most important features of the intrusion/extrusion process can be understood in terms of equilibrium thermodynamics considerations. We believe that these findings are very general for hydrophobic solids, i.e. for both nonwetting as well as wetting water–solid interface systems.

Graphical abstract: Thermodynamics of water intrusion in nanoporous hydrophobic solids

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Article information

DOI
https://doi.org/10.1039/B807471B
Article type
Paper
Submitted
02 May 2008
Accepted
24 Jun 2008
First published
09 Jul 2008

Phys. Chem. Chem. Phys., 2008,10, 4817-4826

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Thermodynamics of water intrusion in nanoporous hydrophobic solids

F. Cailliez, M. Trzpit, M. Soulard, I. Demachy, A. Boutin, J. Patarin and A. H. Fuchs, Phys. Chem. Chem. Phys., 2008, 10, 4817 DOI: 10.1039/B807471B

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