共轭亚油酸乙酯微乳液的制备及其氧化稳定性的研究

Study on Preparation and Oxidation Stability of Conjugated Linoleic Acid Ethyl Ester Microemulsion

以二辛基琥珀酸磺酸钠(AOT)为表面活性剂,短链醇乙醇、正丙醇、正丁醇为助表面活性剂,对共轭亚油酸乙酯进行了微乳化实验。结果表明,使用不同结构的醇做助表面活性剂会影响微乳液形成的类型,而不同的Km值(表面活性剂/助表面活性剂)只影响所形成微乳液的面积。比较了共轭亚油酸乙酯和共轭亚油酸乙酯微乳液的氧化稳定性,结果证明微乳液的抗氧化能力更好,向其中增溶进0.1%的VC和0.1%的VE将大大提升产品的氧化稳定性。

The formation conditions and phase behaviors of conjugated linoleic acid ethyl ester （CLAEE） microemulaion were studied. Aerosol-OT （AOT） was used as surfactant, and several short chain alcohols （i.e. ethanol, n-propanol, and n-butanol） were investigated as cosurfactants. The results showed that different structures of alcohols used as surfactants can form different types of microemulsion, but different values of Km （surfacant/cosurfactant） can only affect the thus-formed microemulaion area. Comparing the oxidative stability of CLAEE, with that of CLAEE microemulsion sees an outstanding rise, in abcttcr reaistance to oxidation of the latter. Hence the practice of adding 0.1% vitamin C （VC） and 0.1% vitamin E （VE） into the CLAEE microemulsion can further increase the oxidative stability of the products.