Drying kinetics of soy protein isolate-corn starch film during preparation and its moisture adsorption characteristics during storage

Q2 Agricultural and Biological Sciences Grain Oil Science and Technology Pub Date : 2023-09-01 DOI:10.1016/j.gaost.2023.08.002

Tingwei Zhu, Jinyu Yang, Wanting Qin, Yadong Tian, Yingying Wang, Xingfeng Guo

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引用次数: 1

Abstract

To better understand the mass transfer process of moisture in the soy protein isolate-corn starch (SPI-CS) films during preparation and storage process, the drying kinetics model of SPI-CS films with different formation conditions during the drying process and the moisture adsorption characteristics of the SPI-CS films under different humidity conditions were investigated. Within the range of experimental conditions, the moisture migration rule in the SPI-CS films during the drying preparation was combined with the Page model which was expressed as MR = exp (−ktⁿ). It was found that the adsorption equilibrium needed shorter time (about 3 h) when the SPI-CS films existed in the environment with lower humidity (RH < 54%). Additionally, the second-order adsorption kinetic equation was successful to describe the moisture adsorption characteristic of the SPI-CS films during storage under different humidity conditions.

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大豆分离蛋白玉米淀粉膜制备过程中的干燥动力学及其贮存过程中的吸湿特性

为了更好地了解大豆分离蛋白-玉米淀粉（SPI-CS）膜在制备和储存过程中水分的传质过程，研究了不同形成条件下SPI-CS膜在干燥过程中的干燥动力学模型以及不同湿度条件下SPI-CS膜的吸湿特性。在实验条件范围内，将SPI-CS薄膜在干燥制备过程中的水分迁移规律与Page模型相结合，该模型表示为MR=exp（−ktn）。研究发现，当SPI-CS膜存在于较低湿度（RH<；54%）的环境中时，吸附平衡需要较短的时间（约3h）。此外，二阶吸附动力学方程成功地描述了SPI-CS薄膜在不同湿度条件下储存过程中的水分吸附特性。

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