PFG-NMR on Double Emulsions: a Detailed Look into Molecular Processes
PFG-NMR on Double Emulsions: a Detailed Look into Molecular Processes
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双乳液的 PFG-NMR：分子过程的详细研究
DOI：
10.1039/9781849732994-00039
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
H.P. Schuchmann
中科院分区：
文献类型：
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作者：
R. Bernewitz;X. Guan;G. Guthausen;F. Wolf;H.P. Schuchmann
单乳液在不同的领域都有很高的兴趣，因此得到了很好的研究。当一种乳剂是另一种乳剂的一部分时，如双重或多重乳剂，它们提供更多的优势。多种乳剂作为一种新型的食品体系，可以减少食品中的脂肪含量或封装活性物质。它们不仅用于食品，而且用于制药或化妆品。与单乳液一样，多乳液的多模态和液滴尺寸分布（DSD）是影响产品质量和物理性能（如粘度和保质期）的重要参数。这些参数对于深入了解两步生产双乳液的第二步发生的机制也很重要，这仍然没有得到详细的了解。目前，用于测定单乳液DSD及其形态的常用测量技术有激光散射、激光衍射、超声波衰减和PFG-NMR。然而，声学和光学方法不能正常工作，甚至根本不能，当目标是关于内部乳剂的结构性质的信息。此外，由于双乳液内部存在多重衍射，使用光学方法对外部乳液的结果不再可靠。
Single emulsions are of high interest in different fields and therefore well investigated. They provide more advantages when an emulsion is part of another emulsion, as double-or multiple emulsion. Multiple emulsions, as novel food systems, reduce the amount of fat in food or encapsulate active substances. They are not only of interest for food, but also for pharmaceutical or cosmetic products.As in case of single emulsions, multi-modality and droplet size distribution (DSD) of multiple emulsions are important parameters for product quality and physical properties (eg viscosity and shelf life). These parameters are also important to gain insight into mechanisms taking place in the second step of the two-step production of double emulsions, which still is not understood in detail. Currently, common measurement techniques for the determination of DSD and its modality of single emulsions are Laser light scattering, Laser diffraction, Ultra sonic attenuation and PFG-NMR. However, acoustic and optical methods do not work properly or not even at all, when aiming for information about structure properties of the inner emulsions. Additionally, results on the outer emulsion are not reliable anymore when using the optical methods, due to multiple diffraction inside the double emulsion.
多重乳液 - 制备和稳定性
DOI：
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发表时间：
2006
期刊：
影响因子：
--
作者：
G. Muschiolik;I. Scherze;P. Preissler;J. Weiss;Annett Dipl.;A. Fechner
通讯作者：
A. Fechner