مقاله Microemulsions and liquid crystalline formulated with triacylglycerols: Effect of ethanol and oil unsaturation : تی پی بین

خلاصه مقاله

Pseudo-ternary phase diagrams were constructed in order to evaluate the effect of the prevailing oil unsaturation and cosurfactant concentration on the phase behavior of systems prepared with sunflower oil or high oleic sunflower oil (HOSO), water, Tween 80 and ethanol. The phase diagrams showed small areas of one single translucid phase with production of water-in-oil (L₂) and oil-in-water (L₁) microemulsions. A higher cosurfactant concentration increased microemulsion area and allowed solubilize more water using lower surfactant content. Moreover, small angle X-ray scattering (SAXS) measurements showed that depending of the composition the surfactant self-assembly led to lamellar (Lα) or hexagonal (H₁) structures. Microemulsions showed Newtonian behavior, while Lα and H₁ showed shear-thinning behavior, viscoelasticity and thixotropy. This more complex rheological behavior was accentuated at lower cosurfactant concentration and with the less unsaturated oil, showing that both oil unsaturation and ethanol content exerted influence on systems properties. However, the higher concentration ethanol masked the effect of oil unsaturation.

نویسندگان

L.H. Fasolin [ Department of Food Engineering, Faculty of Food Engineering, University of Campinas – UNICAMP, CEP: 13083-862, Campinas, SP, Brazil ]

R.C. Santana [ Department of Food Engineering, Faculty of Food Engineering, University of Campinas – UNICAMP, CEP: 13083-862, Campinas, SP, Brazil ]

R.L. Cunha [ Department of Food Engineering, Faculty of Food Engineering, University of Campinas – UNICAMP, CEP: 13083-862, Campinas, SP, Brazil ]

کلمات کلیدی

Microemulsions Liquid crystalline Phase diagram Rheology Cosurfactant Oil unsaturation

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Colloids and Surfaces A: Physicochemical and Engineering Aspects

Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications ofcolloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.Criteria for publication in Colloids and Surfaces A are novelty, quality and current interest. Manuscripts which only make routine use of or minor extensions to well established methodologies (e.g. fitting adsorption data to a Langmuir or Freundlich isotherm) are no appropriate for the journal.

حوزه های تحت پوشش : Physicochemical , food, energy, minerals processing, pharmaceuticals , environment