喷雾干燥制备高纯α-亚麻酸微胶囊研究

摘要

The microencapsulation of high-purity a-linolenic acid was prepared with the spray drying method using high-purity α-linolenic acid as core material and flaxseed gum as wall material. The acting factors of preparing high-purity α-linolenic acid microcapsule have been investigated in detail according to microencapsulation efficiency and the ratio of oil content. The results showed that the best material compositions for microencapsulation were as follows: core material/wall material(m/m) 3:2,material concentration (mass-volume percentage,core material plus wall materials to mixed solution) 5% ,and feeding temperature 20 ℃ ;the optimal spray drying processing conditions were determined as follows,the air temperature at the inlet was 180 ℃,while at the exit was 80 ℃,the rotating speed of centrifugal atomizer was 21000 rpm.and liquid feed rate was 42.01 mL/min. The content of microencapsulation efficiency was 96.18% and the ratio of oil content was 60.09%.%本文采用喷雾干燥法制备高纯α-亚麻酸为芯材、亚麻籽胶为壁材的微胶囊,并以微胶囊化效率和含油率为指标,考察了制备工艺.结果表明,最佳微胶囊原料配方为:芯材与壁材的比例为(m/m)3∶2,料液浓度为5％,进料温度为20℃；最佳喷雾干燥工艺条件:进风温度为180℃,出风温度为80℃,雾化器转速21000 rpm,进料速度为42.01 mL/min.在此工艺条件下亚麻酸的微胶囊化效率为96.18％,含油率为60.09％.