TY - JOUR
T1 - Phase separation of a binary liquid system in controlled-pore glass
AU - Schemmel, S.
AU - Akcakayiran, D.
AU - Rother, G.
AU - Brulet, A.
AU - Farago, B.
AU - Hellweg, Th
AU - Findenegg, G. H.
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=2942670556&partnerID=8YFLogxK
U2 - 10.1557/proc-790-p7.2
DO - 10.1557/proc-790-p7.2
M3 - Conference article
AN - SCOPUS:2942670556
SN - 0272-9172
VL - 790
SP - 215
EP - 220
JO - Materials Research Society Symposium - Proceedings
JF - Materials Research Society Symposium - Proceedings
T2 - Dynamics in Small Confining Systems - 2003
Y2 - 1 December 2003 through 4 December 2003
ER -