多组分油凝胶的非等温结晶动力学研究。

Non-isothermal crystallization kinetics study of multi-component oleogels.

机构信息

South China Agricultural University, Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, Guangzhou, Guangdong 510642, PR China.

出版信息

Food Chem. 2022 Sep 30;389:133123. doi: 10.1016/j.foodchem.2022.133123. Epub 2022 Apr 29.

DOI:10.1016/j.foodchem.2022.133123

PMID:35504072

Abstract

In this study, the influence of non-isothermal conditions on multi-component oleogel (lecithin, LEC and ceramide, CER) was systematically investigated by rheological characterization, polarized light microscopy, and differential scanning calorimetry. Jeziorny and Mo models were applied to reveal the crystallization behavior. When the cooling rate increased, the LEC/CER oleogel exhibited lower G' and larger crystal size. The crystallization kinetics showed that at lower cooling rate, the LEC/CER co-assembled crystals grew at 2-3 dimensions by one step crystallization process. While at high cooling rate, the crystals first grew at 1-2 dimensions through self-assembly of CER. Then, the primary CER crystals served as nuclei for further co-assembly of CER/LEC growing in 2-3 dimensions. Our findings indicated that the cooling rate not only modulated the crystal structure and physical properties, but also the assembly mechanism of multi-component oleogels. Such information is useful for engineering the functional properties of oleogel-based lipidic materials.

摘要

在这项研究中，通过流变特性、偏光显微镜和差示扫描量热法系统研究了非等温条件对多组分油凝胶（卵磷脂，LEC 和神经酰胺，CER）的影响。应用 Jeziorny 和 Mo 模型揭示了结晶行为。当冷却速率增加时，LEC/CER 油凝胶表现出较低的 G' 和较大的晶体尺寸。结晶动力学表明，在较低的冷却速率下，LEC/CER 共组装晶体通过一步结晶过程在 2-3 维方向上生长。而在高冷却速率下，晶体首先通过 CER 的自组装在 1-2 维方向上生长。然后，初级 CER 晶体作为进一步共组装 CER/LEC 的晶核，在 2-3 维方向上生长。我们的研究结果表明，冷却速率不仅调节了晶体结构和物理性质，而且调节了多组分油凝胶的组装机制。这些信息对于工程化基于油凝胶的脂质材料的功能性性质是有用的。