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Properties of Microemulsions with Mixed Nonionic Surfactants and Mint Oil

Eigenschaften von Mikroemulsionen aus Niotensidmischungen und Pfefferminzöl
M. Fanun


In this study we used electrical conductivity, dynamic viscosity, dynamic light scattering, and small angle X-ray scattering for the characterization of the water + propylene glycol/sucrose laurate/ethoxylated mono-di-glyceride/peppermint oil microemulsion systems. The maximum water solubilization in the peppermint oil was found to be dependent on the surfactants mixing ratio (w/w). A Static percolation threshold was determined. The activation energy of conductive flow depends on the surfactants mixing ratio. The hydrodynamic diameter of the diluted microemulsions decreases with the increase in temperature. The periodicity d of the microemulsions increases with the increase in the aqueous phase content. The correlation length ξ increases and decreases with the increase in the aqueous phase content indicating the onset of structural transitions.


In dieser Untersuchung charakterisierten wir Mikroemulsionssysteme aus Wasser und Propylenglykol/Sucroselaurat/ethoxilierten Mono-di-Glyzeriden/Pfefferminzöl mittels Messung der elektrischen Leitfähigkeit, der dynamischen Viskosität, der dynamischen Lichtstreuung und der Kleinwinkelröntgenstreuung. Es wurde festgestellt, dass das Maximum der Wassersolubilisierung im Pfefferminzöl von dem Anteil (w/w) der Tensidmischung abhängig ist. Es wurde eine statische Perkolationsschwelle bestimmt. Die hydrodynamischen Parameter der verdünnten Mikroemulsionen nahmen mit steigender Temperatur ab. Die Periodizität d der Mikroemulsionen steigt mit dem zunehmenden Gehalt der wässrigen Phase an. Die Korrelationslänge ξ steigt und fällt mit dem zunehmenden Gehalt der wässrigen Phase, was auf beginnende Strukturübergänge hindeutet.

Monzer Fanun, Colloids and Surfaces Research Laboratory, Faculty of Science and Technology, Al-Quds University, P.O. Box 51000 East Jerusalem, Palestine. E-Mail: or , Tel.: +97022799753, Fax: +97022796960

Dr. Monzer Fanun was born in November 1966, he is professor and head of the colloids and surfaces research laboratory at Al-Quds University, East Jerusalem, Palestine. In 2003, he received his PhD in Applied Chemistry from the Casali Institute of Applied Chemistry a part of the Institute of Chemistry at the Hebrew University of Jerusalem, Israel. His research focuses on colloidal systems for health care products, surfactant-based alternatives to organic solvents.


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Received: 2009-11-08
Published Online: 2013-04-05
Published in Print: 2010-05-01

© 2010, Carl Hanser Publisher, Munich

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