四种复合壁材对微胶囊大豆油的性能影响
详细信息The influence of four blended wall materials on soybean oil microencapsulation
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摘要: 研究了4种复合壁材对喷雾干燥微胶囊大豆油的性能影响。4种复合壁材由阿拉伯胶（AG）、辛烯基琥珀酸淀粉酯（OSA）、羧甲基纤维素钠（CMC）、卡拉胶（CAR）、麦芽糊精（MD）、大豆分离蛋白（SPI）复配形成。以微胶囊效率、热稳定性、玻璃化转变温度（Tg）和表面形态表征微胶囊性能。结果表明:四种微胶囊均在250℃发生降解,CAR-SPI-MD复合壁材制备的微胶囊,微胶囊效率最高,为95.10%,Tg为48.9℃;CMC-SPI-MD制备的微胶囊,微胶囊效率和Tg最低;而由AG-MD及OSA-MD制备的微胶囊,其微胶囊效率和Tg居两者之间。扫描电镜图（SEM）显示微胶囊呈球形,大部分颗粒表面无显著缝隙和孔洞,但CAR-SPI-MD制备的微胶囊部分颗粒表面存在缝隙和孔洞,需要进一步实验。Abstract: The influence of four blended wall materials on spray-dried soybean oil microencapsulation was studied. Those four blended wall materials were composed by arabic gum (AG) , starch octenylsuccinate (OSA) , sodium carboxymethylcellulose (CMC) , carrageenin (CAR) , maltodextrin (MD) , soy protein isolate (SPI) . The performance of microencapsulation was characterized by microencapsulation efficiency, thermal stability, glass transition temperature (Tg) and surface morphology. All samples were broken down at 250℃, the microencapsulation efficiency of microencapsulation made by CAR-SPI-MD wall material was the highest which was 95. 10%, and its glass transition temperature (Tg) was 48. 9℃. The microencapsulation made by CMC-SPI-MD had the lowest microencapsulation efficiency and Tg, and both of the microencapsulation made by AG-MD and OSA-MD had moderate value. According to scanning electron microscope (SEM) , the particles were rounded, and most of them had no distinct fissures and holes, but there were some fissures and holes around the particle surface made by CAR-SPI-MD, so further studies were needed to improve it.
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