【摘要】 采用乳液模板-层层自组装法,以百里香精油乳液为模板、壳聚糖和海藻酸钠为壁材,制备百里香精油微胶囊(Thyme oil microcapsules,TMS)。以TMS的包埋率为指标,通过单因素和正交试验对其制备工艺进行了优化;通过马尔文激光粒度仪、扫描电镜、透射电镜以及GC-MS对百里香精油微胶囊进行了表征。结果表明,最佳制备参数为:均质压力62 MPa、均质循环6次,NaCl添加量为0.3%,pH 6,基于静电作用组装的TMS包埋率为71.13%±0.03%,平均粒径为140 nm,球形规整,能保留百里香精油的主要成分。更多还原

【Abstract】 The thyme oil microcapsules(TMS) were prepared by layer-by-layer self-assembly method using thyme oil emulsion as the template, chitosan and sodium alginate as wall materials. The formulation and process of TMS were studied by single factor and orthogonal experiment. The TMS were characterized by Malvern laser particle size analyzer, transmission electron microscopy, scanning electron microscopy and GC-MS(gas chromatography-mass spectrometry). The results showed that the optimal formulas were 62 MPa for homogenization pressure, 6 for homogenization times, 0.3% for NaCl content and the pH 6. At this condition, the TMS were successfully assembled, based on electrostatic interactions, and the encapsulation efficiency of TMS was 71.13%±0.03%. TMS were with average particle size at 140 nm with regular morphology, and the TMS could maintain the activity of main components of thyme oil.更多还原