Abstract Deep eutectic solvents have aroused a great level of interest in recent years. In this regard, a simple model is presented for the calculation of viscosities of a wide range of deep eutectic solvents. Based on a databank covering 156 deep eutectic solvents of different natures, a straightforward, simple, accurate, and global correlation is proposed. This model, which covers wide ranges of temperatures, requires the critical pressure, critical temperature, and one reference viscosity data as its input parameters. Since the model has one set of global constants, it can be used for any DES. Apart from this correlation, a second approach was also taken in this study, which was to obtain the constants of the Vogel-Fulcher-Tamman (VFT) model for all of the investigated DESs. With this approach, the constants are individually fit to each DES, therefore, no physical properties are required as input. The average absolute relative deviation errors of 10.4% and 1.7% for the proposed model and the VFT model, respectively, are compared to literature models. The results indicate that the proposed correlation, in addition to its acceptable accuracy and simplicity, is a general model for the estimation of the viscosities of different-natured deep eutectic solvents.

中文翻译：

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低共熔溶剂粘度的简单模型

摘要 近年来，深共熔溶剂引起了人们极大的兴趣。在这方面，提出了一个简单的模型来计算各种低共熔溶剂的粘度。基于一个涵盖 156 种不同性质的深共熔溶剂的数据库，提出了一种直接、简单、准确和全局的相关性。该模型涵盖广泛的温度范围，需要临界压力、临界温度和一个参考粘度数据作为其输入参数。由于该模型具有一组全局常量，因此它可以用于任何 DES。除了这种相关性之外，本研究还采用了第二种方法，即获得所有研究的 DES 的 Vogel-Fulcher-Tamman (VFT) 模型的常数。通过这种方法，常数分别适合每个 DES，因此，不需要物理属性作为输入。与文献模型相比，所提出模型和 VFT 模型的平均绝对相对偏差误差分别为 10.4% 和 1.7%。结果表明，所提出的相关性，除了其可接受的准确性和简单性之外，还是用于估计不同性质的深共晶溶剂粘度的通用模型。