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Issue 8, 2011
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Temperature dependence of the surfactant film bending elasticity in a bicontinuous sugar surfactant based microemulsion: a quasielastic scattering study

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Abstract

Currently, the design of microemulsions is focussed on the formulation of environmentally compatible systems formed by non-harmful amphiphiles and oils. The use of sugar-based surfactants allows the design of microemulsions where, instead of the temperature, the addition of short- or medium-chain alcohols tunes the curvature of the amphiphilic interface. In this work, the resulting temperature stability of a sugar surfactant and rapeseed methyl ester based bicontinuous microemulsion is exploited to study the influence of temperature variations on the bending elastic constant κ. Quasi-elastic scattering of light and neutrons is used to separate long-range collective motions and local thermally excited undulations of the interface. κ in units of kT is found to be independent of temperature over a wide range.

Graphical abstract: Temperature dependence of the surfactant film bending elasticity in a bicontinuous sugar surfactant based microemulsion: a quasielastic scattering study

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Article information


Submitted
05 Oct 2010
Accepted
18 Nov 2010
First published
10 Dec 2010

Phys. Chem. Chem. Phys., 2011,13, 3092-3099
Article type
Paper

Temperature dependence of the surfactant film bending elasticity in a bicontinuous sugar surfactant based microemulsion: a quasielastic scattering study

S. Wellert, M. Karg, O. Holderer, A. Richardt and T. Hellweg, Phys. Chem. Chem. Phys., 2011, 13, 3092
DOI: 10.1039/C0CP02044C

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