Sousa F L, Santos M, Rocha S M, Trindade T
Department of Chemistry, CICECO, University of Aveiro, Campus de Santiago , Aveiro , Portugal and.
J Microencapsul. 2014;31(7):627-35. doi: 10.3109/02652048.2014.911376. Epub 2014 Apr 25.
Natural substances derived from plants such as essential oils (EOs) are used in a variety of applications such as in the release of fragrances or active substances in cosmetics, in food industries to protect sensitive ingredients against oxidative processes and as antimicrobial agents. However, the labile and volatile nature of EOs reduces their activity during application or storage. Here, the microencapsulation of EOs in silica capsules was investigated as a mean to control the fast release of their volatile constituents. The preparation of silica capsules with oil cores was obtained by employing a sol-gel method to oil-in-water-in-oil (O/W/O) multiple emulsions. The volatile release from the SiO2 capsules was investigated by comprehensive two-dimensional gas chromatography with time of flight mass spectrometry detection (GC × GC-ToFMS). This research demonstrates that the SiO2 capsules have selectively encapsulated the different volatile species and the corresponding release profiles depend on the chemical properties of each component.
源自植物的天然物质，如香精油（EOs），被用于多种应用中，比如在化妆品中释放香料或活性物质，在食品工业中保护敏感成分免受氧化过程影响以及作为抗菌剂。然而，香精油不稳定且易挥发的特性会降低其在应用或储存过程中的活性。在此，研究了将香精油微囊化于二氧化硅胶囊中，作为一种控制其挥发性成分快速释放的方法。通过采用溶胶 - 凝胶法将油包水包油（O/W/O）多重乳液用于制备具有油芯的二氧化硅胶囊。利用全二维气相色谱 - 飞行时间质谱检测（GC × GC - ToFMS）研究了二氧化硅胶囊的挥发性成分释放情况。这项研究表明，二氧化硅胶囊已选择性地包封了不同的挥发性物质，且相应的释放曲线取决于每种成分的化学性质。
