Confinement effect on the adsorption from a binary liquid system near liquid/liquid phase separation

Gernot Rother, Dirk Woywod, Martin Schoen, Gerhard H. Findenegg

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

The preferential adsorption of one component of a binary system into the inner surfaces of mesoporous silica glass was investigated at temperatures close to liquid/liquid phase separation. Three controlled pore glass materials of different mean pore sizes were used to analyze the confinement effect on adsorption. Strong preferential adsorption of water was found to take place in an experimental system that exhibited an upper miscibility gap. The area-related surface excess amount of water was also observed to decrease with decreasing pore size in the strong adsorption regime, while the shift in the volume-related mean composition of the pore liquid showed an opposite trend.

Original languageEnglish
Pages (from-to)11864-11873
Number of pages10
JournalJournal of Chemical Physics
Volume120
Issue number24
DOIs
StatePublished - Jun 22 2004
Externally publishedYes

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