摘要
制备微藻油微胶囊产品,通过对其理化性质的测定,考察产品在贮藏期间的稳定性。结果表明:微胶囊水分含量为3.68%,包埋率为94.30%,平均粒径为497.9nm,溶解度为94.37%时,在贮藏过程中较为稳定;扫描电镜结果证实了微胶囊较好的包埋效果,能够对芯材起到保护作用;差示扫描热分析(DSC)结果显示,微胶囊的热溶解温度较高,其完整结构能够在大多数加工过程中稳定存在,在贮藏过程中热稳定性虽有所下降,但变化不大。在耐热强度实验中,微胶囊破坏率随温度升高而增高,表明微胶囊应低温贮藏。
The storage stability of microalgal oil microcapsules was investigated by determining physico-chemical properties. The moisture content, the encapsulation efficiency, the average particle size and the solubility of freshly prepared microalgal oil microcapsules were 3.68%, 94.30%, 497.9 nm and 94.37%, respectively. All these indexes were relatively stable during 180 d storage. The core material was found to be well protected under scanning electron microscopy （SEND. DSC analysis indicated that the Tm of microalgal oil microcapsules was high, suggesting that the complete structure of microcapsules can exist stably during thermal processing. A slight decrease in the thermal stability was seen during storage. With the temperature increasing, the microcapsule damage rate increased in heat resistant strength test, suggesting that microalgal oil microcapsules should be stored at low temperature.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第17期123-126,共4页
Food Science
基金
"十一五"国家科技支撑计划项目(2006BAD27B04)
关键词
微藻油
DHA
微胶囊
理化性质
稳定性
micro-algal oil
DHA
microcapsule
physico-chemical properties
stability
