芳樟醇型叶用精油的热降解及其用β-环糊精微胶囊化的稳定化作用。
Thermal Degradation of Linalool-Chemotype Leaf Essential Oil and Its Stabilization by Microencapsulation with β-Cyclodextrin.
机构信息
School of Forestry and Resource Conservation, National Taiwan University, Taipei 10617, Taiwan.
Department of Wood Based Materials and Design, National Chiayi University, Chiayi 600355, Taiwan.
出版信息
Molecules. 2021 Jan 14;26(2):409. doi: 10.3390/molecules26020409.
The thermal degradation of linalool-chemotype leaf essential oil and the stability effect of microencapsulation of leaf essential oil with β-cyclodextrin were studied. After thermal degradation of linalool-chemotype leaf essential oil, degraded compounds including β-myrcene, -ocimene and -ocimene, were formed through the dehydroxylation of linalool; and ene cyclization also occurs to linalool and its dehydroxylated products to form the compounds such as limonene, terpinolene and α-terpinene. The optimal microencapsulation conditions of leaf essential oil microcapsules were at a leaf essential oil to the β-cyclodextrin ratio of 15:85 and with a solvent ratio (ethanol to water) of 1:5. The maximum yield of leaf essential oil microencapsulated with β-cyclodextrin was 96.5%. According to results from the accelerated dry-heat aging test, β-cyclodextrin was fairly stable at 105 °C, and microencapsulation with β-cyclodextrin can efficiently slow down the emission of linalool-chemotype leaf essential oil.
研究了芳樟醇型叶精油的热降解以及β-环糊精包埋叶精油的稳定性效应。芳樟醇型叶精油热降解后，通过芳樟醇的去羟基化形成降解化合物，包括β-月桂烯、-罗勒烯和-罗勒烯；烯环化也发生在芳樟醇及其去羟基化产物上，形成化合物，如柠檬烯、松油萜和α-松油烯。叶精油微胶囊的最佳包埋条件为叶精油与β-环糊精的比例为 15:85，溶剂比（乙醇与水）为 1:5。β-环糊精包埋叶精油的最大产率为 96.5%。根据加速干热老化试验结果，β-环糊精在 105°C 时相当稳定，β-环糊精包埋可以有效地减缓芳樟醇型叶精油的释放。
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