Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 20: Poster: Colloids and Complex Liquids
CPP 20.4: Poster
Dienstag, 12. März 2013, 18:15–20:15, Poster C
Temperature dependent behaviour of droplet and droplet shell in decan/AOT/H2O microemulsions — •Markus Domschke, Sabine Best, and Rudolf Feile — TU Darmstadt, Institut für Festkörperphysik, Hochschulstraße 8, 64289 Darmstadt,Germany
The behaviour of water/AOT/decan microemulsions in the droplet phase of different sizes (ω = 2 − 40) and droplet volume fractions of φ = 0.1 − 0.4 is studied in a wide temperature range.
Combining differential scanning calorimetry (DSC) and refractive index measurements induce a new perspective of AOT-bound water in the droplets [1]. Small angle X-Ray scattering (SAXS) allows continuous analysis of the droplet structure between supercooling temperature of bulk water and phase separation temperature within a unique model. We introduce a combined structure factor of hard spheres [2] and Ornstein-Zernicke type [3].
[1] M. van Dijk et al., J. Phys. Chem. 93, 2506 (1989)
[2] N. W. Ashcroft and J. Lekner, Phys. Rev. 145, 83 (1966)
[3] M. Kotlarchyk et al. , Phys. Rev. A 28, 508- (1983)