维生素E-植物甾醇亚油酸酯复合脂质体的制备工艺优化及表征

    Optimization of preparation process and characterizations of liposomes co-encapsulating vitamin E and phytosterol linoleate ester

    • 摘要: 为了提高维生素E的水溶性、稳定性以及生物利用率,以大豆磷脂和植物甾醇亚油酸酯为膜材,采用薄膜-超声分散法包埋维生素E,制备维生素E-植物甾醇亚油酸酯复合脂质体。以包封率为指标,通过Box-Behnken响应面试验优化制备工艺,并使用透射电子显微镜、傅里叶红外光谱和X-射线衍射对该复合脂质体其进行表征。结果表明:最佳制备工艺条件为植物甾醇亚油酸酯与大豆磷脂质量比1:25、维生素E与大豆磷脂质量比1:4、磷酸盐缓冲液pH 7.4、超声时间5 min、超声功率265 W、水化温度55℃,复合脂质体的包封率可达(94.59±0.67)%。傅里叶红外光谱与X-射线衍射分析结果表明,植物甾醇亚油酸酯和维生素E被脂质体成功包埋;透射电子显微镜结果表明,维生素E-植物甾醇亚油酸酯复合脂质体囊泡形貌呈规则球型,且均匀分散。该研究为维生素E-植物甾醇亚油酸酯复合脂质体在食品工业中的应用提供了理论依据和新思路。

       

      Abstract: In order to enhance the stability, water dispersibility, and bioavailability of vitamin E, liposomes co-encapsulating vitamin E and phytosterol linoleate ester was prepared by employing a thin-film ultrasound method with the utilization of soy phosphatidylcholine and phytosterol linoleic acid esters in this study. The preparation process was optimized by Box-Behnken response surface test with encapsulation efficiency as index. The liposomes were observed by transmission electron microscopy and characterized by fourier transform infrared spectroscopy and X-ray diffraction. The results showed that the optimal preparation conditions were as follows: the mass ratio of phytosterol linoleic acid ester to soybean phospholipid was 1: 25, the mass ratio of vitamin E to soybean phospholipid was 1: 4, the pH of phosphate buffer was 7.4, the ultrasonic time was 5 min, the ultrasonic power was 265 W, and the hydration temperature was 55℃. The encapsulation efficiency of the liposome was 94.59 ±0.67%. The results of fourier transform infrared spectroscopy and X-ray diffraction analysis showed that phytosterol linoleic acid ester and vitamin E were successfully embedded into liposomes. The results of transmission electron microscopy showed that the morphology of liposomes co-encapsulating vitamin E and phytosterol linoleate ester vesicles was regular spherical and uniformly dispersed. This study provides a theoretical basis and new ideas for the application of liposomes co-encapsulating vitamin E and phytosterol linoleate ester in the food industry.

       

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