Fig 1.
Pseudo-ternary phase diagrams for microemulsions.
Pseudo-ternary phase diagrams for microemulsions of oleic acid, ethanol, Tween 20, and water. The oil phase used were (a) oleic acid; (b) oleic acid/ethanol = 3:1; (c) oleic acid/ethanol = 1:1; (d) oleic acid/ethanol = 1:3.
Fig 2.
Solubilization capacity and solubilization efficiency of tea seed oil.
The solubilization capacity of tea seed oil (amount of tea seed oil per preparation) (×), and solubilization efficiency (amount of tea seed oil normalized to the amount of oil, ethanol, and surfactant) (∆) were plotted against the aqueous phase content, along the dilution line D73 at 25°C.
Fig 3.
DSC curves of carrier and solubilized systems.
DSC curves of microemulsions along dilution line D73: (a) the carrier system; (b) the solubilized system (1.5% weight ratio of tea seed oil to the total amount of oil and surfactant).
Table 1.
Thermal behavior of the carrier system along the dilution line D73 at different water contents measured by DSC.
Table 2.
Thermal behavior of the solubilized system along dilution line D73 at different water contents measured by DSC.
Fig 4.
The contents of water at different states in carrier and solubilized systems.
Variation in the content of non-freezable (∆), bound (□), interfacial (○), and free water (☆) as a function of water content along dilution line D73 for the (a) carrier (hollow symbol), and (b) solubilized systems (hollow plus cross symbol). Some data points of the carrier and solubilized systems are totally overlapped with each other.
Fig 5.
The viscosity of carrier and solubilized systems.
The viscosity of microemulsions along dilution line D73 for the carrier (∆) and solubilized (□) systems.