Irregular solution thermodynamics of wood pulp in the superbase ionic liquid [m-TBDH][AcO]

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http://hdl.handle.net/10138/323362

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Driver , G W & Kilpelainen , I A 2020 , ' Irregular solution thermodynamics of wood pulp in the superbase ionic liquid [m-TBDH][AcO] ' , RSC Advances , vol. 10 , no. 69 , pp. 42200-42203 . https://doi.org/10.1039/d0ra08892g

Title: Irregular solution thermodynamics of wood pulp in the superbase ionic liquid [m-TBDH][AcO]
Author: Driver, Gordon W.; Kilpelainen, Ilkka A.
Contributor: University of Helsinki, Department of Chemistry
University of Helsinki, Helsinki Institute of Sustainability Science (HELSUS)
Date: 2020-11-22
Language: eng
Number of pages: 4
Belongs to series: RSC Advances
ISSN: 2046-2069
URI: http://hdl.handle.net/10138/323362
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 (a(i,j)) and associated mass fraction (w(i,j)) activity coefficients (omega(i,j)), are determined to quantify inherent solution non-ideality. Access to the Gibbs energy of mixing, G(mix), 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.
Subject: IONCELL-F
CELLULOSE
DISSOLUTION
116 Chemical sciences
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