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Understanding the mechanism of saccharides type and concentration affecting texture of freeze-dried pectin-CMC cryogels through experiment and molecular dynamic simulation

文献类型： 外文期刊

作者： Youchuan Ma;Jinfeng Bi;Zhonghua Wu;Jianyong Yi

作者机构：

关键词： Freeze-dried;Molecular dynamic simulation;Pectin;Saccharides;Texture

期刊名称： International Journal of Biological Macromolecules

ISSN： 0141-8130

年卷期： 2025 年 292 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Saccharides are the dominant factor shaping the texture of freeze-dried products. This study investigated the impact of various molecular-weight saccharides at different concentrations on the physical properties and intermolecular interactions of pectin-CMC cryogels by experiment and molecular dynamic (MD) simulations. Results showed that the increased shrinkage of cryogels and enhanced molecular interactions between saccharides and pectin-CMC were mechanisms that enhanced the hardness of cryogels. Notably, the cryogel with fructose exhibited significantly higher hardness compared to cryogels with other saccharides. The cryogel containing 16 % fructose had the lowest glass transition temperature (Tg), leading to the highest shrinkage (70 %). Moreover, the MD results revealed that fructose had the highest intermolecular interaction energy (coulombic short range) with pectin-CMC (−5316.78 kJ/mol). This study revealed that the intermolecular interactions between the added saccharide and the pectin-CMC, in addition to the density of the cryogel, are critical determinants of the hardness and crispness of cryogels.

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