Aqueous foams stabilized solely by particles

Stocco, A.; Rio, E.; Binks, B. P.; Langevin, D.

Abstract

Foams are dispersions of bubbles in liquids, often water. They are frequently stabilized by surfactant or polymer, but like Pickering emulsions, they can be also stabilized solely by particles. If the particles have a moderate hydrophobicity, the foams can be extremely stable (lifetimes of the order of years). Due to technical preparation difficulties, very few studies can be found in the literature to date. We will discuss the origin of these difficulties. We will also describe experiments using partially hydrophobic fumed silica particles, in which the foam properties were correlated with the properties of spread and adsorbed layers of these particles at the air-water interface. These combined experiments allowed us to define the conditions necessary to stop bubble disproportionation.

Citation

Stocco, A., Rio, E., Binks, B. P., & Langevin, D. (2011). Aqueous foams stabilized solely by particles. Soft matter, 7(4), 1260-1267. https://doi.org/10.1039/c0sm01290d

• Journal Article Type: Article
• Acceptance Date: Dec 15, 2010
• Online Publication Date: Jan 11, 2011
• Publication Date: Feb 21, 2011
• Journal: SOFT MATTER
• Print ISSN: 1744-683X
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 4
• Pages: 1260-1267
• DOI: https://doi.org/10.1039/c0sm01290d
• Keywords: Air-water-interface; Silica; Nanoparticles; Fluid interfaces; Emulsions; Bubbles; Hydrophobicity
• Public URL: https://hull-repository.worktribe.com/output/396324
• Publisher URL: http://pubs.rsc.org/en/Content/ArticleLanding/2011/SM/c0sm01290d#!divAbstract