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Published on: March 21, 2016
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Oil-in-water emulsions based on hydrophobic eutectic systems
Dannie J G P van Osch1, Jaap van Spronsen2, A Catarina C Esteves1
1Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. m.vis@tue.nl and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Physical Chemistry Chemical Physics : PCCP
|January 9, 2020
Summary
Hydrophobic eutectic systems (ES) form stable oil-in-water emulsions. These ES emulsions exhibit slower Ostwald ripening than expected, offering tunable stability for liquid emulsions of solid components.
Area of Science:
- Colloid and Surface Science
- Materials Science
- Physical Chemistry
Background:
- Hydrophobic eutectic systems (ES) are typically solid at room temperature.
- Creating stable liquid emulsions from solid components presents formulation challenges.
- Understanding emulsion stability mechanisms like Ostwald ripening is crucial for product development.
Purpose of the Study:
- To demonstrate the feasibility of preparing oil-in-water emulsions using hydrophobic eutectic systems (ES).
- To investigate the phenomenon of Ostwald ripening in ES-in-water emulsions.
- To compare the stability of ES-in-water emulsions with conventional oil-in-water emulsions.
Main Methods:
- Preparation of oil-in-water emulsions from hydrophobic eutectic systems.
- Characterization of droplet formation and stability using light microscopy and zeta potential measurements.
- Quantitative analysis of Ostwald ripening rates via dynamic light scattering over time.
Main Results:
- Stable oil-in-water emulsions were successfully prepared from hydrophobic eutectic systems.
- ES-in-water emulsions exhibited a slower Ostwald ripening rate compared to decane-in-water emulsions.
- The reduced ripening rate was attributed to the two-component nature of the ES, with the least-soluble component governing the growth rate.
Conclusions:
- Hydrophobic eutectic systems provide a novel route to create liquid emulsions from solid components.
- The composition of ES allows for control over emulsion stability by influencing Ostwald ripening.
- These findings offer advantages for formulating stable emulsions with tunable properties.
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