Solubilization of Tea Seed Oil in a Food-Grade Water-Dilutable Microemulsion

Abstract

Food-grade microemulsions containing oleic acid, ethanol, Tween 20, and water were formulated as a carrier system for tea seed oil (Camellia oleifera Abel.). The effect of ethanol on the phase behavior of the microemulsion system was clearly reflected in pseudo-ternary diagrams. The solubilization capacity and solubilization efficiency of tea seed oil dispersions were measured along the dilution line at a 70/30 surfactant/oil mass ratio with Tween 20 as the surfactant and oleic acid and ethanol (1:3, w/w) as the oil phase. The dispersed phase of the microemulsion (1.5% weight ratio of tea seed oil to the total amount of oil, surfactant, and tea seed oil) could be fully diluted with water without phase separation. Differential scanning calorimetry and viscosity measurements indicated that both the carrier and solubilized systems underwent a similar microstructure transition upon dilution. The dispersion phases gradually inverted from the water-in-oil phase (< 35% water) to the bicontinuous phase (40–45% water) and finally to the oil-in-water phase (> 45% water) along the dilution line.

Effect of different solvents on subcritical solvent extraction of oil from Assam tea seeds (Camellia sinensis var. assamica): Optimization of oil extraction and physicochemical analysis

“…Moreover, the viscosity of the tea seed oil samples was not different to that of soybean oil but was lower than that of rice bran oil. In addition, the viscosity result in this study was similar to that obtained by Deng et al (). They found that commercial C. oleifera Abel oil in China had a viscosity value of approximately 49.1 mPa.s.…”

Recent Development of Nanomaterials for Transdermal Drug Delivery

“…Super paramagnet magnets (Fe 3 O 4 ) and magnetite (Fe 2 O 3ɣ ), commonly used in medical applications [ 50 ], have particle sizes of 3–30 nm and size distributions of ~10–20% and they dissolve in water [ 51 , 52 ]. Iron oxide (Fe 3 O 4 ) magnetic NPs of a small size are favored for biomedical and biological applications [ 53 ].…”

Design and formulation of surfactant stabilized O/W emulsion for application in enhanced oil recovery: effect of pH, salinity and temperature

“…An increase in temperature from 30°C to 70°C moved SF downwards with a shift towards right suggesting an increase in viscous behavior of emulsion. Temperature rise enhances the mobility of surfactant molecules making emulsion more flowable by reducing the relaxation time (Deng et al, 2015). Dominance of G 0 over G 00 (G 0 > G 00 ) after SF shows the transition from viscous to elastic nature.…”