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Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study
Published on: August 15, 2016
Emulsion preparation using beta-cyclodextrin and its derivatives acting as an emulsifier
Motoki Inoue1, Kaname Hashizaki, Hiroyuki Taguchi
1College of Pharmacy, Nihon University, Funabashi, Chiba, Japan.
Natural and modified beta-cyclodextrins (beta-CDs) create stable emulsions. Tripropanoyl-beta-CD (TP-beta-CD) specifically formed stable water-in-oil emulsions, with emulsion type depending on contact angle measurements.
Area of Science:
- Colloid and Surface Science
- Materials Science
- Supramolecular Chemistry
Background:
- Emulsions are crucial in various industries, requiring effective emulsifiers for stability.
- Beta-cyclodextrins (beta-CDs) are versatile host molecules with potential as natural emulsifiers.
- Chemically modified beta-CDs offer tailored properties for specific emulsion applications.
Purpose of the Study:
- To investigate the preparation and formation mechanism of n-hexadecane/water emulsions.
- To evaluate natural beta-cyclodextrin and chemically modified beta-CDs as emulsifiers.
- To determine the influence of beta-CD structure on emulsion type (O/W vs. W/O).
Main Methods:
- Preparation of n-hexadecane/water emulsions using natural beta-CD and triacylated beta-CDs.
- Characterization of emulsion stability.
- Contact angle measurements (theta(ow)) of CD precipitates to predict emulsion type.
Main Results:
- Stable water-in-oil (W/O) emulsions were successfully formed using tripropanoyl-beta-CD (TP-beta-CD).
- The contact angle (theta(ow)) of CD precipitates correlated with the emulsion type formed.
- Oil-in-water (O/W) emulsions formed at theta(ow)<90 degrees, while W/O emulsions formed at theta(ow)>90 degrees.
Conclusions:
- Tripropanoyl-beta-CD is an effective emulsifier for creating stable W/O emulsions.
- Contact angle measurements provide a reliable method for predicting emulsion type based on emulsifier properties.
- Beta-cyclodextrin derivatives offer tunable properties for controlled emulsion formation.
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