Abstract

Deep Eutectic Solvents (DESs) have recently emerged as green alternatives to ionic liquids (ILs). Encouraged by the sustainability of this novel class of solvents, the aim of this work is to prepare DESs using three different hydrogen bond acceptors (HBA), such as cholinium chloride, acetylcholinium chloride and benzyldimethyl(2-hydroxyethyl)ammonium chloride and five naturally occurring carbohydrates, namely D-(+)-Xylose, D-(+)-Mannose, D-(−)-Fructose, D-(+)-Glucose and D-(−)-Ribose, which will act as hydrogen bond donors (HBD). NMR and FTIR were used to ascertain about the chemical structures and purities of these carbohydrates-based DESs, while their thermal properties were evaluated through DSC and TGA analysis. Due to the high viscosity of the carbohydrate-based DESs, and its high hydrophilic and hygroscopic nature, 10 wt% of water was added to mimic its use under normal atmosphere conditions and enable their use as solvents. Densities and viscosities at atmospheric pressure and in the temperature range between 293.15 K and 353.15 K were measured for the prepared DES aqueous solutions. Finally, the suitability of these carbohydrates-based DESs as solvents for the dissolution of rice straw was investigated.

Original languageEnglish
Pages (from-to)441-447
Number of pages7
JournalJournal of Molecular Liquids
Volume247
DOIs
Publication statusPublished - 1 Dec 2017

Fingerprint

carbohydrates
thermophysical properties
Straw
rice
Carbohydrates
eutectics
Eutectics
dissolving
Dissolution
Thermodynamic properties
Chlorides
Hydrogen bonds
chlorides
xylose
Viscosity
viscosity
hydrogen bonds
ribose
Ionic Liquids
Ammonium Chloride

Keywords

  • Carbohydrates
  • Deep eutectic solvents
  • Green solvents
  • Rice straw dissolution
  • Thermophysical properties

Cite this

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abstract = "Deep Eutectic Solvents (DESs) have recently emerged as green alternatives to ionic liquids (ILs). Encouraged by the sustainability of this novel class of solvents, the aim of this work is to prepare DESs using three different hydrogen bond acceptors (HBA), such as cholinium chloride, acetylcholinium chloride and benzyldimethyl(2-hydroxyethyl)ammonium chloride and five naturally occurring carbohydrates, namely D-(+)-Xylose, D-(+)-Mannose, D-(−)-Fructose, D-(+)-Glucose and D-(−)-Ribose, which will act as hydrogen bond donors (HBD). NMR and FTIR were used to ascertain about the chemical structures and purities of these carbohydrates-based DESs, while their thermal properties were evaluated through DSC and TGA analysis. Due to the high viscosity of the carbohydrate-based DESs, and its high hydrophilic and hygroscopic nature, 10 wt{\%} of water was added to mimic its use under normal atmosphere conditions and enable their use as solvents. Densities and viscosities at atmospheric pressure and in the temperature range between 293.15 K and 353.15 K were measured for the prepared DES aqueous solutions. Finally, the suitability of these carbohydrates-based DESs as solvents for the dissolution of rice straw was investigated.",
keywords = "Carbohydrates, Deep eutectic solvents, Green solvents, Rice straw dissolution, Thermophysical properties",
author = "Catarina Florindo and Oliveira, {M. Margarida} and Branco, {Lu{\'i}s C.} and Marrucho, {Isabel M.}",
year = "2017",
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doi = "10.1016/j.molliq.2017.09.026",
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journal = "Journal of Molecular Liquids",
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publisher = "Elsevier Science B.V., Amsterdam.",

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T1 - Carbohydrates-based deep eutectic solvents

T2 - Thermophysical properties and rice straw dissolution

AU - Florindo, Catarina

AU - Oliveira, M. Margarida

AU - Branco, Luís C.

AU - Marrucho, Isabel M.

PY - 2017/12/1

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AB - Deep Eutectic Solvents (DESs) have recently emerged as green alternatives to ionic liquids (ILs). Encouraged by the sustainability of this novel class of solvents, the aim of this work is to prepare DESs using three different hydrogen bond acceptors (HBA), such as cholinium chloride, acetylcholinium chloride and benzyldimethyl(2-hydroxyethyl)ammonium chloride and five naturally occurring carbohydrates, namely D-(+)-Xylose, D-(+)-Mannose, D-(−)-Fructose, D-(+)-Glucose and D-(−)-Ribose, which will act as hydrogen bond donors (HBD). NMR and FTIR were used to ascertain about the chemical structures and purities of these carbohydrates-based DESs, while their thermal properties were evaluated through DSC and TGA analysis. Due to the high viscosity of the carbohydrate-based DESs, and its high hydrophilic and hygroscopic nature, 10 wt% of water was added to mimic its use under normal atmosphere conditions and enable their use as solvents. Densities and viscosities at atmospheric pressure and in the temperature range between 293.15 K and 353.15 K were measured for the prepared DES aqueous solutions. Finally, the suitability of these carbohydrates-based DESs as solvents for the dissolution of rice straw was investigated.

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