A study on the Thermophysical Properties and Excess Functions of Binary Mixtures of the Ionic Liquid [BMIM][NTf₂] with 2-Methoxyethanol at 298.15–323.15 K

Author(s)	Mr. Chandrabhan Singh Niranjan, Dr. Rakesh Kumar Singh, Dr. Prakash Chandra
Country	India
Abstract	Experimental density (ρ) and viscosity (η) data were measured for binary mixtures of the ionic liquid [BMIM][NTf₂] with 2-methoxyethanol over the full composition range at temperatures from 298.15 to 323.15 K and atmospheric pressure. Excess molar volumes (Vᴱ) and viscosity deviations (Δη) were derived to assess mixture non-ideality. Density increases with ionic liquid mole fraction and decreases slightly with temperature. Negative Vᴱ values across most compositions indicate strong attractive interactions and efficient molecular packing. Viscosity rises markedly with ionic liquid content and decreases with temperature, while predominantly negative Δη values confirm significant non-ideal flow behavior due to specific intermolecular interactions. The combined volumetric and transport property data provide valuable insight into the molecular interactions governing the thermophysical behavior of [BMIM][NTf₂]–2ME mixtures and are expected to be useful for the design and optimization of ionic-liquid-based solvent systems in industrial and environmental applications.
Keywords	Redlich–Kister coefficients, ionic liquids, binary mixtures
Field	Chemistry
Published In	Volume 7, Issue 6, November-December 2025
Published On	2025-12-20
DOI	https://doi.org/10.36948/ijfmr.2025.v07i06.64010

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