四种复合壁材对微胶囊大豆油的性能影响

The influence of four blended wall materials on soybean oil microencapsulation

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。

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 （ M D）, 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~C, 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.