Pore shape affects the determination of the pore size of ordered mesoporous silicas by mercury intrusion

Anne Galarneau (1) , Benoit Lefèvre (1) , Helene Cambon (1) , Benoit Coasne (1) , Sabine Valange (2) , Zelimir Gabelica (3) , Jean-Pierre Bellat (4) , Francesco Di Renzo (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 LACCO - Laboratoire de catalyse en chimie organique
3 Université de Haute-Alsace (UHA) - Université de Haute-Alsace (UHA) Mulhouse - Colmar
4 ICB - Laboratoire Interdisciplinaire Carnot de Bourgogne

The pore shape affects the pressure of mercury intrusion in ways not contemplated by the usual Washburn-Laplace or Kloubek-Rigby-Edler models. These models have been developed for cylindrical pores and correctly account for the penetration of mercury in the cylindrical pores of MCM-41. The uneven surface of the cylindrical pores of SBA-15 is responsible for a significant increase of the pressure of mercury intrusion and, thereby, for a corresponding underevaluation of the pore size if the classical pressure-size correlations are applied.

Mots clés: porosimetry; MCM-41; SBA-15; pore size; mesopores

Domaines: Matériaux

Anne Galarneau, Benoit Lefèvre, Helene Cambon, Benoit Coasne, Sabine Valange, et al.. Pore shape affects the determination of the pore size of ordered mesoporous silicas by mercury intrusion. 4th International FEZA Conference, Sep 2008, Paris, France. pp.957-960, ⟨10.1016/S0167-2991(08)80048-1⟩. ⟨hal-00353939⟩