Irregular solution thermodynamics of wood pulp in the superbase ionic liquid [m-TBDH][AcO]
Open Access
- 19 November 2020
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in RSC Advances
- Vol. 10 (69), 42200-42203
- https://doi.org/10.1039/d0ra08892g
Abstract
Knowledge of solution thermodynamics is fundamental for solution control and solvent selection processes. Herein, experimentally determined thermodynamic quantities for solutions of wood pulp (hardwood dissolving pulp, i.e. cellulose) in [m-TBDH][AcO] are presented. Model-free activities (ai,j) and associated mass fraction (wi,j) activity coefficients (Ωi,j), are determined to quantify inherent solution non-ideality. Access to the Gibbs energy of mixing, Gmix, in combination with associated partial molar thermodynamic quantities, reveal strong enthalpically favourable (exothermic) interactions due to solvent-j and solute-i contact-encounters. Onset of an entropy driven phase instability appears at increased temperatures as excess entropic contributions dominate solvation character of the irregular solutions formed.This publication has 20 references indexed in Scilit:
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