Abstract
Oleogel samples were prepared from sunflower oil with β-Sitosterol (Sit) and Stearic acid (SA) mixture. Water was added to prepare an oleogel-based emulsion. The oleogel-based emulsion showed a white and smooth appearance without separation after storage at 5οC for 24 h. The firmness of emulsion reduced as the water content increased, while it was increased as the oleogelator concentration increased. Additionally, diffraction patterns and thermal properties of emulsion varied depending on water content. Furthermore, all the oleogel-based emulsion samples showed a positive slope of storage modulus (G′) and loss modulus (G″) with the increase in frequency. On the other hand, the stability of β-carotene (BC) -loaded emulsion to different conditions was evaluated. A greater BC content was found for samples stored in the dark and under natural light than that of samples stored under UV light. Oleogel and oleogel-based emulsion showed a good BC release rate in simulated gastrointestinal fluids. The obtained results indicate that functional BC-fortified emulsion can be successfully prepared using β-Sitosterol and Stearic acid mixture with sunflower oil and water.
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