High Internal Phase Emulsions: Catastrophic Phase Inversion, Stability, and Triggered Destabilization
| العنوان: | High Internal Phase Emulsions: Catastrophic Phase Inversion, Stability, and Triggered Destabilization |
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| المؤلفون: | Saeed Mashinchi, Timothy S. Dunstan, Paul D. I. Fletcher |
| المصدر: | Langmuir. 28:339-349 |
| بيانات النشر: | American Chemical Society (ACS), 2011. |
| سنة النشر: | 2011 |
| مصطلحات موضوعية: | Hand shaking, Chemistry, Drop (liquid), Surfaces and Interfaces, Condensed Matter Physics, Internal phase, Contact angle, Crystallography, Chemical engineering, Pulmonary surfactant, Volume fraction, Emulsion, Electrochemistry, General Materials Science, Wetting, Spectroscopy |
| الوصف: | We have investigated the formation, drop sizes, and stability of emulsions prepared by hand shaking in a closed vessel in which the emulsion is in contact with a single type of surface during its formation. The emulsions undergo catastrophic phase inversion from oil-in-water (o/w) to water-in-oil (w/o) as the oil volume fraction is increased. We find that the oil volume fraction required for catastrophic inversion exhibits a linear correlation with the oil-water-solid surface contact angle. W/o high internal phase emulsions (HIPEs) prepared in this way contain water drops of diameters in the range 10-100 μm; emulsion drop size depends on the surfactant concentration and method of preparation. W/o HIPEs with large water drops show water separation but w/o HIPEs with small water drops are stable with respect to water separation for more than 100 days. The destabilization of the w/o HIPEs can be triggered by either evaporation of the oil continuous phase or by contact the emulsion with a solid surface of the "wrong" wettability. |
| تدمد: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la204104m |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9f12fe662df7be86fc696b8a59405aa https://doi.org/10.1021/la204104m |
| رقم الانضمام: | edsair.doi.dedup.....b9f12fe662df7be86fc696b8a59405aa |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15205827 07437463 |
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| DOI: | 10.1021/la204104m |