期刊
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
卷 44, 期 -, 页码 32-47出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.cocis.2019.09.005
关键词
Surface phase transition; Liquid condensed phase; Liquid expanded phase; Adsorption layer; Foam; Emulsion; Partial coalescence; Surface nucleation; Drop self-shaping; Saponin
资金
- Bulgarian Ministry of Education and Science, under the National Research Programme Healthy Foods for a Strong Bio-Economy and Quality of Life [577/17.08.2018]
- EU
Surface phase transitions in surfactant adsorption layers are known to affect the dynamic properties of foams and to induce surface nucleation in freezing emulsion drops. Recently, these transitions were found to play a role in several other phenomena, opening new opportunities for controlling foam and emulsion properties. This review presents a brief outlook of the emerging opportunities in this area. Three topics are emphasized: (1) the use of surfactant mixtures for inducing phase transitions on bubble surfaces in foams; (2) the peculiar properties of natural surfactants saponins, which form extremely viscoelastic surface layers; and (3) the main phenomena in emulsions, for which the surface phase transitions are important. The overall conclusion from the reviewed literature is that surface phase transitions could be used as a powerful tool to control many foam and emulsion properties, but we need deeper understanding of the underlying phenomena to fully explore these opportunities.
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