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2023.
Antifreeze with coffee taste
This study presents the results of volumetric and viscometric measurements of caffeine solutions in an equimolar mixture of ethylene glycol – water, known as antifreeze. Measurements were made in the temperature range T = (283.15 – 313.15) K and up to a caffeine molality of 0.12 mol∙kg-1. Experimental results are supported by molecular dynamics (MD) computer simulations. The obtained results indicate that water molecules have a dominant role in the solvation of caffeine. At the same time, ethylene glycol acts as a dehydrating agent and promotes the self-aggregation of caffeine and the investigated mixture.