Formation and characterization of microcapsules by complex coacervation with liquid or solid aroma cores
Formation and characterization of microcapsules by complex coacervation with liquid or solid aroma cores
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DOI：
10.1002/ffj.1911
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发表时间：
2009-01-01
影响因子：
2.6
通讯作者：
Reineccius, Gary A.
中科院分区：
文献类型：
--
作者：
Leclercq, Segolene;Harlander, Kristin R.;Reineccius, Gary A.
综述了文献中报道的通过凝聚法包封芳香化合物的工艺参数，并讨论了它们对胶囊形成的影响。然后，我们报告了我们的方法，以生产凝聚体[液体（柠檬烯或中链甘油三酯）或固体核心（薄荷醇）]使用阿拉伯胶/明胶作为壁材料。优化生产参数，以生产一致批次的凝聚层微胶囊。胶囊用戊二醛交联并冷冻干燥。凝聚体的结构和形状，尺寸分布，风味负荷和吸水率进行了表征。此外，一项简短的储存研究比较了凝聚胶囊和喷雾干燥胶囊（使用改性淀粉作为载体材料）保护柠檬烯免受氧化的能力。在45 ℃下储存25天后，在通过凝聚制备的胶囊中没有检测到氧化柠檬烯的可检测的增加，而在同一时间段内，在喷雾干燥的粉末中检测到氧化柠檬烯的显著增加。通过凝聚的封装（如本文所述）似乎是用于封装芳香化合物的有效技术，并提供了对敏感材料氧化的良好屏障。版权所有（C）2008约翰威利父子有限公司
The process parameters typically reported in the literature for the encapsulation of aroma compounds via coacervation are reviewed and their effects on capsule formation discussed. We then report on our approach to produce coacervates [liquid (limonene or medium chain triglycerides) or solid core (menthol)] using gum acacia/gelatin as wall materials. Manufacturing parameters were optimized to allow the production of consistent batches of coacervate microcapsules. Capsules were crosslinked with glutaraldehyde and freeze-dried. Coacervates were characterized for their structure and shape, size distribution, flavour load and water uptake rate. In addition, a brief storage study compared the ability of coacervate capsules and spray-dried capsules (using modified starch as carrier material) to protect limonene from oxidation. No detectable increase in limonene oxide could be detected in capsules made by coacervation over 25 days in storage at 45 C, whereas a significant increase in limonene oxide was detected in spray-dried powder over the same period. Encapsulation by coacervation (as described in this paper) appears to be an effective technique for encapsulating aroma compounds and provides a good barrier against oxidation of sensitive material. Copyright (C) 2008 John Wiley & Sons, Ltd.