Water-in-oil (W/O) emulsions were investigated using light scattering and rheology to determine the effect of polyglycerol polyricinoleate (PGPR) concentration and inner aqueous phase composition on stability. Using high-pressure homogenization and 2% PGPR it was possible to obtain small and stable W/O emulsion droplets with 30% water. The emulsions were then incorporated in a water-in-oil-in-water (W/O/W) emulsion, and droplets were still present in the inner phase after one month of storage, as clearly shown by confocal microscopy. Encapsulation efficiencies were tested using a water-soluble dye, brilliant blue and a divalent cation, magnesium chloride. The encapsulation efficiency and stability of the encapsulated material depended on the nature of the material being encapsulated.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OGU.10214/3064 |
| Date | 07 October 2011 |
| Creators | Massel, Valerie |
| Contributors | Corredig, Milena |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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