Dresden 2009 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 39: POSTERS Colloids and Liquids

CPP 39.12: Poster

Donnerstag, 26. März 2009, 17:00–19:30, P3

Wetting properties of sugar surfactant based microemulsions at solid surfaces — •Stefan Wellert¹, Ralf Stehle², Christoph Schulreich², Matthias Karg², Andre Richardt³, and Thomas Hellweg² — ¹Helmholtz-Zentrum Berlin f. Energie und Materialien, Glienicker Str. 100, D-14109 Berlin — ²Physikalische Chemie I, Universität Bayreuth Universitätsstr. 30, D-95447 Bayreuth — ³WIS f. ABC Schutztechnol. Munster, Humboldtstr.1 D-29623 Munster

Compared to many standard products, surfactants containing sugar components and fatty acids are advantageous with respect to applications where environmental compatibility or human health is important. In this context very often microemulsions are used to overcome solubilization problems also in the presence of various solid surfaces. For example, cleaning and extraction applications in sensitive environments like human skin or interior technical equipment can benefit from the green and soft performance of sugar surfactant based microemulsions. Although the interaction between the microemulsion and the surface is essential for the desired functionality, only a few works attributed to this can be found in the literature. In this contribution we discuss the wetting properties of sugar surfactant based microemulsions on surfaces of different hydrophobicity. In the microemulsion systems under investigation Pentanol and sugar surfactants were used to form the interface between water and oils of different polarity. The wetting properties in terms of contact angles were investigated with droplet and bicontinuous microemulsions at different oil-water ratios at hydrophilic, -phobic and partially hydrophobic surfaces.