Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 30, Issue 6, Pages 852-856Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01932690802644038
Keywords
-Cyclodextrin; cycloalkanol; Pickering emulsion; rheology
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Funding
- MEXT (Ministry of Education, Culture, Sports, Science and Technology)
- Nihon University Research
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We examined the preparation and characterization of cycloalkanol/water emulsions using -cyclodextrin (-CD) as an emulsifier. Emulsions were prepared by mixing -CD, cycloalkanol, and water using a vortex mixer. The mechanism of emulsification was investigated with some physicochemical techniques. From phase diagrams of cycloalkanol/-CD/water systems, the emulsion phase extended as the carbon number of cycloalkanols increased. Furthermore, it was thought that the coexistence of precipitated cycloalkanol/-CD complexes were necessary for formation of the emulsion. However, the precipitated complexes did not have surface activity. From observation using a polarized light microscope, it was suggested that the precipitated complexes were formed at the oil-water interface and supplied to the continuous phase. We concluded that cycloalkanol/water emulsions using -CD were stabilized by precipitated complexes that exist on the droplet surface and the continuous phase, and these emulsions were a type of Pickering emulsion.
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