| Autor: |
Soboleva OA; Chair of Colloid Chemistry, Faculty of Chemistry , Moscow State University , 1-3 Leninskiye Gory , 119991 Moscow , Russia., Protsenko PV; Chair of Colloid Chemistry, Faculty of Chemistry , Moscow State University , 1-3 Leninskiye Gory , 119991 Moscow , Russia., Korolev VV; Chair of Colloid Chemistry, Faculty of Chemistry , Moscow State University , 1-3 Leninskiye Gory , 119991 Moscow , Russia., Viktorova J; Is it fresh GmbH, Technologiezentrum am Europaplatz , Dennewartstraße 25 , 52068 Aachen , Germany., Yakushenko A; Is it fresh GmbH, Technologiezentrum am Europaplatz , Dennewartstraße 25 , 52068 Aachen , Germany., Kudla R; Deutsches Textilforschungszentrum Nord-West gGmbH (DTNW) , Adlerstraße 1 , 47798 Krefeld , Germany., Gutmann JS; Deutsches Textilforschungszentrum Nord-West gGmbH (DTNW) , Adlerstraße 1 , 47798 Krefeld , Germany.; Department of Chemistry & CENIDE , University Duisburg-Essen , Universitätsstraße 5 , 45141 Essen , Germany., Tsarkova LA; Chair of Colloid Chemistry, Faculty of Chemistry , Moscow State University , 1-3 Leninskiye Gory , 119991 Moscow , Russia.; Deutsches Textilforschungszentrum Nord-West gGmbH (DTNW) , Adlerstraße 1 , 47798 Krefeld , Germany. |
| Abstrakt: |
Understanding of nonequilibrium processes at dynamic interfaces is indispensable for advancing design and fabrication of solid-state and soft materials. The research presented here unveils specific interfacial behavior of aroma molecules and justifies their usage as multifunctional volatile surfactants. As nonconventional volatile amphiphiles, we study commercially available poorly water-soluble compounds from the classes of synthetic and essential flavor oils. Their disclosed distinctive feature is a high dynamic interfacial activity, so that they decrease the surface tension of aqueous solutions on a time scale of milliseconds. Another potentially useful property of such amphiphiles is their volatility, so that they notably evaporate from interfaces on a time scale of seconds. This behavior allows for control of wetting and spreading processes. A revealed synergetic interfacial behavior of mixtures of conventional and volatile surfactants is attributed to a decrease of the activation barrier as a result of high statistical availability of new sites at the surface upon evaporation of the volatile component. Our results offer promising advantages in manufacturing technologies which involve newly creating interfaces, such as spraying, coating technologies, ink-jet printing, microfluidics, laundry, and stabilization of emulsions in cosmetic and food industry, as well as in geosciences for controlling aerosol formation. |
