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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Keller, Rabea Rietzler, Uwe Fell, Daniela Butt, Hans-Jürgen Curschellas, Corina Limbach, Hans Jörg Berger, Rüdiger |
| Description | Country affiliation: Switzerland Author Affiliation: Curschellas C ( Laboratory of Food Process Engineering, ETH Zürich, Schmelzbergstrasse 9, CH-8092 Zürich, Switzerland. corina.curschellas@hest.ethz.ch) |
| Abstract | Foamed products are a popular class of food products. The mechanism of stabilization of the air bubbles is often only partially understood. The current study aims at better understanding the stabilization of air-water interfaces through the low molecular weight surfactant polyglycerol ester (PGE). We chose PGE films as an exemplary case for a non-equilibrium situation at an air-water interface--a situation that requires the development of new experimental techniques. Several different film preparation and transfer methods onto solid substrates have been tested. The films were then investigated by scanning force microscopy, and structural artifacts associated to the sample preparation were identified and discussed. In addition to the study of Langmuir monolayers and Gibbs adsorption layers, we have proposed a new approach to investigate the skins of foam bubbles. We thereby were able to determine that PGE indeed covers bubbles by a multilayer structure and that the pH plays a role in the structuring of the films. We show that a combination of different film preparation methods allows us to get an insight into the aggregation behavior of PGE at the air-water interface and thereby better understand the stabilization mechanism of this particular surfactant. |
| ISSN | 00219797 |
| Issue Number | 1 |
| Volume Number | 374 |
| e-ISSN | 10957103 |
| Journal | Journal of Colloid and Interface Science |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2012-05-15 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Esters Chemistry Glycerol Polymers Surface-active Agents Adsorption Air Hydrogen-ion Concentration Microscopy, Atomic Force Molecular Weight Surface Properties Water Journal Article Research Support, Non-u.s. Gov't Discipline Colloid & Interface Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Colloid and Surface Chemistry Biomaterials Electronic, Optical and Magnetic Materials |
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