Insights on the water effect on deep eutectic solvents properties and structuring: The archetypical case of choline chloride plus ethylene glycol

The effect of water on the properties and nanostructuring of the prototypical choline chloride: ethylene glycol deep eutectic solvent is studied using a combined experimental and theoretical approach. The reported results showed large hydrophilic character of the solvent, which is based on the ability of water molecules to be hydrogen bonded to the different components of the eutectic in a efficient way. The effect of water on the studied fluid is largely dependent on the concentration range but the properties of the eutectic solvent can be maintained up to reasonably large water content. Therefore, the water content in these solvents may be used for tuning and controlling their properties but maintaining properties and features. (C) 2021 The Authors. Published by Elsevier B.V.

Automated summary

A combined experimental and theoretical approach was used to study the effect of water on the properties and nanostructuring of choline chloride: ethylene glycol deep eutectic solvent. The results showed a large hydrophilic character of the solvent due to the efficient hydrogen bonding between water molecules and different components of the eutectic. The impact of water on the studied fluid depends largely on the concentration range, but the properties of the eutectic solvent can be maintained even with a relatively high water content.