Emulsion preparation
Oil-water-cellulose ether emulsions were prepared with two different cellulose ethers with thermogelling ability, supplied by The Dow Chemical Co. (K4M and K250M). Both are hydroxipropilmethylcellulose, but K4M has a viscosity of 4 Pas in a 2 g/ 100 g aqueous solution at 20 C, and K250M has a viscosity of 250 Pas. The ingredients of the emulsion were sunflower oil with a high level of oleic acid (Carrefour, Madrid, Spain), water and the
different cellulose ethers. The proportions used were sunflower oil 51 g/100 g, cellulose ether 2 g/100 g and water 47 g/100 g. The cellulose etherwas first dispersed in the oil using a Heidolph stirrer at the lowest speed for 5 min. The cellulose ether was then hydrated
by gradually adding the water at 10 C while continuing to stir. Stirring continued using a homogenizer (Ultraturrax T18, IKA, Germany) until the emulsion was obtained.
Emulsion preparationOil-water-cellulose ether emulsions were prepared with two different cellulose ethers with thermogelling ability, supplied by The Dow Chemical Co. (K4M and K250M). Both are hydroxipropilmethylcellulose, but K4M has a viscosity of 4 Pas in a 2 g/ 100 g aqueous solution at 20 C, and K250M has a viscosity of 250 Pas. The ingredients of the emulsion were sunflower oil with a high level of oleic acid (Carrefour, Madrid, Spain), water and thedifferent cellulose ethers. The proportions used were sunflower oil 51 g/100 g, cellulose ether 2 g/100 g and water 47 g/100 g. The cellulose etherwas first dispersed in the oil using a Heidolph stirrer at the lowest speed for 5 min. The cellulose ether was then hydratedby gradually adding the water at 10 C while continuing to stir. Stirring continued using a homogenizer (Ultraturrax T18, IKA, Germany) until the emulsion was obtained.
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