Issue 22, 2000

Dynamics in an oil-continuous droplet microemulsion as seen by quasielastic scattering techniques

Abstract

This contribution presents the direct determination of the bending elasticity of the surfactant film in an oil-continuous microemulsion by means of neutron spin-echo spectroscopy and dynamic light scattering. The investigated system is C10E4/water dispersed in n-octane. The values obtained for the bending elastic constants are compared to results from indirect determinations based on the spinning drop method. While good agreement is found for κ, the values computed for [small kappa, Greek, macron] differ slightly when the calculation is based on polydispersities obtained from small angle neutron scattering experiments. Better agreement is reached using the polydispersities calculated from dynamic light scattering data. Furthermore, problems which seem to be specific for oil-continuous systems are addressed.

Article information

Article type
Paper
Submitted
26 Jun 2000
Accepted
11 Sep 2000
First published
17 Oct 2000

Phys. Chem. Chem. Phys., 2000,2, 5168-5174

Dynamics in an oil-continuous droplet microemulsion as seen by quasielastic scattering techniques

T. Hellweg, A. Brûlet and T. Sottmann, Phys. Chem. Chem. Phys., 2000, 2, 5168 DOI: 10.1039/B005088L

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