Characteristics of a Temperature-Dependent Aqueous Solution of Maltitol with DEGMME/DEGMEE: An Acoustic and Volumetric Approach

Abstract

This study provides a great understanding of molecular interactions occurring in the ternary system, consisting of two solutes (diethylene glycol monomethyl ether and diethylene glycol monoethyl ether) and solvent (maltitol (aq)). This research was conducted at four temperatures, ranging from 288.15 to 318.15 K, with intervals of 10 K. The experiments were performed at a 3 MHz frequency and an experimental pressure of 0.1 MPa, using the Anton Paar DSA 5000 M. The values of density (ρ) and speed of sound (c) for the ternary mixtures (DEGMME/DEGMEE + maltitol (aq)) were obtained experimentally at various concentrations of maltitol (0.04, 0.06, and 0.08 mol·kg^–1). Based on the obtained values of density and speed of sound, the apparent molar properties of DEGMME/DEGMEE in aqueous maltitol solutions were estimated. Additionally, the partial molar properties and transfer properties were estimated. The calculated interaction coefficients and thermal expansion coefficient further contributed to a deeper understanding of the nature of interactions within the solution.