Abstract
Oleogels,gels in which the continuous liquid phase is oil, have been suggested as promising low-saturated alternatives to the conventional shortenings. In this study, we aimed to develop and optimize low saturated oleogel shortenings using ethylcellulose or ethylcellulose/hydroxypropyl methylcellulose biopolymers (as oleogelators), sunflower oil (as the base oil), and palm stearin (as the source of saturated fatty acids). Using the response surface-d-optimal method, oleogel formulations containing saturated fatty acids as low as 15.19 % could be developed. As compared to the commercial shortening samples, oleogel shortenings had much lower saturation levels (15.19–17.02 vs 47.87–58.65 %) but a comparable melting point, firmness, and rheological properties. However, oleogel samples had lower solid fat content and induction period of oxidation than commercial ones. Oleogel made using ethylcellulose/hydroxypropyl methylcellulose biopolymers contained lower saturation level, solid fat content, induction period of oxidation, and firmness but a higher melting point, as compared to that made using ethylcellulose.
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