Density and excess molar volume of the protic ionic liquid bis(2-hydroxyethyl)ammonium acetate with alcohols

• Main Authors: Kiki, Adi Kurnia, Ariwahjoedi, B., Abdul Mutalib, M I, T., Murugesan
• Format: Citation Index Journal
• Language: English
• Published: Springer 2011
• Subjects: TP Chemical technology
• Online Access: http://scholars.utp.edu.my/id/eprint/6630/1/JSC-2011.pdf; http://scholars.utp.edu.my/id/eprint/6630/
• Institution: Universiti Teknologi Petronas

Densities were determined for binary mixtures containing the protic ionic liquid bis(2-hydroxyethyl)ammonium acetate [BHEAA] and an alcohol (methanol, ethanol, and 1-propanol) at four different temperatures (293.15, 303.15, 313.15, and 323.15) K and ambient pressure. Coefficients of thermal expansion and excess molar volumes were calculated from the experimental densities. The excess molar volumes were fitted using the Redlich-Kister polynomial equation. Negative deviations from ideal behavior of the excess molar volume were observed for all systems investigated in this study. The results were interpreted in terms of ion-dipole interactions and structural factors of the ionic liquid and alcohol. It was observed that an increase of the alcohol carbon chain length led to lower interactions on mixing.