Interaction of gum acacia and natural deep eutectic solvents: Effect on conductivity, thermal stability, compression, and stress relaxation properties

Food Physics Pub Date : 2024-11-30 DOI:10.1016/j.foodp.2024.100045

Rebika Salam, Prostuti Chakravorty, Amit Baran Das

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Abstract

The present study discussed the structure-function relationships of gum acacia and natural deep eutectic solvents (NADES) through interactive effects on physical, chemical, and rheological properties. Lactic acid, malic acid, glucose, and fructose-based NADES were prepared using the heating and stirring method. These NADES were mixed with 5 and 7 % gum acacia to obtain dispersion. The NADES-gum acacia dispersion was analysed using FTIR, DSC, compression extrusion test and rheometer to measure the change in physical, thermal, and rheological characteristics. The gum acacia dispersion with lactic acid, and malic acid NADES showed low pH with high conductivity and density. The dispersion with sugar NADES showed higher thermal stability than dispersion with acid NADES. FTIR showed that there was a strong interaction between gum acacia and NADES. The dispersion having sugar NADES showed higher peak force and energy than acid NADES. The dispersion showed non-Newtonian and pseudo-plastic behaviour and experimental data well fitted with Carreau-Yasuda model. The gum acacia with sugar NADES dispersions exhibited high zero share viscosity and relaxation time. Therefore, the present study manifested a tailoring approach for gum acacia dispersion according to the purpose to use.

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金合欢胶与天然深共晶溶剂的相互作用：对电导率、热稳定性、压缩和应力松弛性能的影响

本研究通过对天然深共晶溶剂（NADES）的物理、化学和流变性能的相互作用，探讨了金合欢胶与天然深共晶溶剂的结构-功能关系。采用加热搅拌法制备乳酸基、苹果酸基、葡萄糖基和果糖基NADES。这些NADES与5和7 %的金合欢胶混合得到分散体。采用红外光谱（FTIR）、DSC、压缩挤压试验和流变仪对nades -阿拉伯胶分散体进行分析，测量其物理、热、流变特性的变化。皂荚胶与乳酸、苹果酸NADES的分散具有低pH、高电导率和高密度的特点。与酸性NADES相比，含糖NADES的分散体表现出更高的热稳定性。FTIR结果表明，金合木与NADES之间存在较强的相互作用。含糖NADES的分散体表现出比酸性NADES更高的峰值力和能量。色散表现出非牛顿和伪塑性行为，实验数据与carau - yasuda模型拟合良好。含糖NADES分散体的金合欢胶具有较高的零粘度和松弛时间。因此，本研究显示了一种根据使用目的定制相思胶分散体的方法。

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Food Physics

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