Characterization of the spray drying behaviour of emulsions containing oil droplets with a structured interface
Characterization of the spray drying behaviour of emulsions containing oil droplets with a structured interface
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DOI：
10.3109/02652048.2012.726282
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发表时间：
2013-05
影响因子：
3.9
通讯作者：
Yvonne Serfert;J. Schröder;A. Mescher;J. Laackmann;M. Q. Shaikh;K. Rätzke;V. Gaukel;H. Schuchmann;P. Walzel;H. Moritz;S. Drusch;Karin Schwarz
中科院分区：
文献类型：
--
作者：
Yvonne Serfert;J. Schröder;A. Mescher;J. Laackmann;M. Q. Shaikh;K. Rätzke;V. Gaukel;H. Schuchmann;P. Walzel;H. Moritz;S. Drusch;Karin Schwarz
本研究的目的是研究卵磷脂(单层乳剂)和卵磷脂/壳聚糖(双层乳剂)逐层乳剂的雾化干燥过程以及微胶囊在储存过程中的氧化稳定性。为此，对双流体喷嘴和旋转雾化过程中的乳化液雾化液滴尺寸进行了分析，以确定合适的工艺参数。通过计算声悬浮条件下单液滴干燥过程中的体积流动密度，研究了单层和双层乳状液的干燥行为。在喷雾干燥固体颗粒中，单层微胶囊的氧化稳定性高于双层微胶囊。这部分归因于与单层微囊相比，双层微囊的微胶囊效率较低。此外，可以看出，壳聚糖在载体基质中的过量会影响自由体积元素，从而影响氧的扩散。
The aim of this study was to characterize the process of atomization and drying of layer-by-layer emulsions containing lecithin (single layer emulsion) and lecithin/chitosan (bilayer emulsion) and the oxidative stability of the microcapsules during storage. For this purpose, the analysis of the emulsion spray droplet size during two-fluid nozzle and rotary atomization was carried out to identify suitable process parameters. The drying behaviour of single and bilayer emulsions was investigated by calculation of the volume flow density during single-droplet drying during acoustic levitation. In spray-dried solid particles, the oxidative stability in the single layer microcapsules was higher than in the bilayer microcapsules. This was partly attributed to lower microencapsulation efficiency in the bilayer microcapsules compared to the single layer microcapsules. Furthermore, it could be shown, that excess chitosan in the bulk carrier matrix affects the free volume elements and thus oxygen diffusion.