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Updated: Aug 15, 2026

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
Published on: March 27, 2019
Nature of capillary condensation and evaporation processes in ordered porous materials
Annie Grosman1, Camille Ortega
1Institut des Nanosciences de Paris (INSP), Universités Paris 6 et 7, UMR-CNRS 75-88, Campus Boucicaut, France. annie.grosman@insp.jussieu.fr
Abstract:
We report on a detailed experimental study of capillary condensation-evaporation processes of N(2) in ordered mesoporous SBA-15 silica. We have carried out measurements of boundary hysteresis loops, reversal curves, and subloops in order to test whether this material behaves as an assembly of independent cylindrical pores open at both ends. With these data, we come to the conclusion that, whereas the boundary hysteresis loop has the classical shape of type H1 associated with condensation-evaporation in cylindrical pores open at both ends, the capillary evaporation does not take place at equilibrium as it is generally assumed. Moreover, the pores do not desorb independently of one another.
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