Zhongguo youzhi (Mar 2023)
青金桔籽油微胶囊的喷雾干燥技术制备工艺优化Optimization of preparation of green kumquat seed oil microcapsules by spray drying technology
Abstract
为有效保留青金桔籽油中营养活性成分及特殊风味物质，并方便应用于食品中，对采用喷雾干燥技术制备青金桔籽油微胶囊进行了研究。在筛选出的包埋效果及乳液稳定性均佳的大豆分离蛋白与麦芽糊精（质量比1∶ 1）为复合壁材基础上，以包埋率为指标，采用单因素实验和正交实验对青金桔籽油微胶囊的制备工艺条件进行优化，并对微胶囊的性质进行表征。结果表明：最佳工艺条件为壁材水溶液质量浓度19.23 g/mL、芯壁比1∶ 2.5、单甘酯与蔗糖酯按质量比3∶ 7组成的乳化剂总添加量占乳液质量的1.00%、喷雾干燥进风温度180 ℃，在此条件下包埋率为84.33%；制备的青金桔籽油微胶囊为均匀的球形纳米颗粒，表面光滑且结构紧密，包埋效果好，水分含量为2.47%，平均粒径为238.56 nm，分散系数为0.26，休止角为32.81°，堆积密度为0.33 g/mL。综上，采用喷雾干燥技术可制备包埋效果和性质良好的青金桔籽油微胶囊 In order to effectively retain the nutritional activity components and special flavor substances in green kumquat seed oil, and to facilitate its application in food, spray drying technology was used to prepare green kumquat seed oil microcapsules. Based on the screening of soybean isolate protein and maltodextrin (mass ratio 1∶ 1) as the composite wall material with good embedding effect and emulsion stability, single-factor experiment and orthogonal experiment were used to optimize the preparation process conditions of green kumquat seed oil microcapsules using the embedding rate as the index, and the properties of the microcapsules were characterized. The results showed that the optimal preparation conditions were obtained as follows: mass concentration of aqueous solution of wall material 19.23 g/mL, ratio of core material to wall material 1∶ 2.5, total amount of emulsifier composed of monoglyceride and sucrose ester with mass ratio of 3∶ 7 1.00%（based on the mass of emulsion）and spray drying inlet air temperature 180 ℃. Under the optimal conditions， the embedding rate reached 84.33%. The prepared green kumquat seed oil microcapsules were uniform spherical nanoparticles with smooth surface, compact structure and good embedding effect,and its moisture content was 2.47%, the average particle size was 238.56 nm,the dispersion coefficient was 0.26, the repose angle was 32.81°, and bulk density was 0.33 g/mL. In conclusion, the green kumquat seed oil microcapsules with good encapsulation efficiency and properties can be prepared by spray drying technology.
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