Phase separation of a binary liquid system in controlled-pore glass

S. Schemmel, D. Akcakayiran, G. Rother, A. Brulet, B. Farago, Th Hellweg, G. H. Findenegg

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

The phase separation behaviour and the dynamics of concentration fluctuations of binary liquid mixtures are strongly influenced by confinement effects. We have investigated this confinement effect for the binary system isobutyric acid iBA + D2O imbibed into a mesoporous silica glass (CPG-10). The dynamics of the mixture are studied in the one-phase region as well as in the phase-separated state by means of neutron spin echo spectroscopy (NSE). Moreover, the averaged structures of the liquid are explored by means of small angle neutron scattering (SANS) leading to a length scale 4 < ξ < 9 nm for the fluctuations. The associated effective diffusion coefficient Deff as obtained for NSE is found to decrease with temperature ny nearly one order of magnitude in the temperature range from 75°C to 25°C.

Original languageEnglish
Pages (from-to)215-220
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume790
DOIs
StatePublished - 2003
Externally publishedYes
EventDynamics in Small Confining Systems - 2003 - Boston, MA, United States
Duration: Dec 1 2003Dec 4 2003

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