Responsive Aqueous Foams |
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Authors: | Dr Anne‐Laure Fameau Adrian Carl Dr Arnaud Saint‐Jalmes Dr Regine von Klitzing |
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Institution: | 1. UR1268 Biopolymères Interactions Assemblages, Institut National de la Recherche Agronomique, Rue de la Géraudière, F‐44316 Nantes cedex 3 (France);2. Stranski‐Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, TU Berlin, Strasse des 17. Juni 124, 10623 Berlin (Germany);3. Institut de Physique de Rennes, UMR CNRS 6251‐Université Rennes 1, Rennes (France) |
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Abstract: | Remarkable properties have emerged recently for aqueous foams, including ultrastability and responsiveness. Responsive aqueous foams refer to foams for which the stability can be switched between stable and unstable states with a change in environment or with external stimuli. Responsive foams have been obtained from various foam stabilizers, such as surfactants, proteins, polymers, and particles, and with various stimuli. Different strategies have been developed to design this type of soft material. We briefly review the two main approaches used to obtain responsive foams. The first approach is based on the responsiveness of the interfacial layer surrounding the gas bubbles, which leads to responsive foams. The second approach is based on modifications that occur in the aqueous phase inside the foam liquid channels to tune the foam stability. We will highlight the most sophisticated approaches, which use light, temperature, and magnetic fields and lead to switchable foam stability. |
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Keywords: | emulsions foams magnetic properties surfactants stimuli‐responsive |
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