橘皮精油微胶囊的制备及其稳定性研究

Study on the Preparation and Stability of Orange Peel Essence Oil Microcapsule

橘皮精油的易挥发性影响了它的实际应用,为扩大其应用,本研究以β-环糊精为包埋剂,以包埋率为主要评价指标,采用Box-Behnken中心组合试验和响应面分析法,优化了橘皮精油微胶囊化工艺;并通过考察橘皮精油微胶囊的挥发率来研究其稳定性。结果表明:橘皮精油微胶囊化的适宜工艺为芯壁材质量比(橘皮精油∶β-环糊精)为1∶5.7、于47℃包埋1.7 h,此工艺条件下制备的微胶囊包埋率达66.7%,包埋得率达88.5%。其稳定性研究表明,在20℃鼓风干燥24 h条件下,橘皮精油微胶囊的挥发率较液态精油降低了65.9%,80℃鼓风干燥24 h条件下,其精油损失也仅为液态精油(20℃鼓风干燥24 h)的42.2%,控释效果明显。

Volatility of Orange peel essence oil affects its practical application. To expand the application of orange peel essence oil, the processing technology for preparing orange peel essence oil mierocapsule with β- cyclodex- trin was investigated and optimized by Box - Behnken central composite test and response surface methodology. After- wards, the stability of orange peel essential 0il microcapsule was investigated by measuring its volatilization rate. The results showed that the encapsulating rate and the encapsulating yield of orange peels essence oil can reach 66.7% and 88.5%, respectively under condition of encapsulating temperature 47 ℃, encapsulating time 1.7 h, and core/wall material ratio（orange peel essential oil β-cyclodextrin）1：5.7. Besides, compared with the liquid orange peel es- sence oils,the volatilization rate of orange peel essence oil microcapsule was reduced by 65.9% （20 ℃ normal pres- sure blowing drying for 24 h）, and under the condition that 80℃ normal pressure blowing drying for 24 h its loss of essence oil was only 42.2% of the liquid essence oi1（20 ℃normal pressure blowing drying for 24 h）. Results indica- ted that the microcapsule existed controlled -release capacity and high stability.