Effect of composition and water content on physicochemical properties of choline chloride-boric acid low-melting mixtures

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Abstract

Deep eutectic solvents are potential alternatives to volatile petrochemical solvents because they are comparatively inexpensive and easy to prepare. Further, the melting point of eutectic solvents may drop remarkably when mixing two components, the hydrogen bond donor and acceptor, together. A systematic study of these mixtures can foster the development of new design solvents for numerous industrial applications. This study presents a detailed characterization and effect of water on low-melting mixtures consisting of choline chloride and boric acid. The results indicate that a eutectic point occurred in 1:1 ratio, with a melting point of 21 °C. In all mixtures, viscosities showed non-Newtonian behaviour. The findings suggest a specific amount of water can reduce viscosity, density, energy of activation, and acidity of these mixtures. Additionally, Nuclear Magnetic Resonance, Fourier-transform infrared spectroscopy and X-ray Diffractometer were used to characterize the mixtures. The results suggest that the coordination of boron changed as the amount of choline chloride and water increased.
Original languageEnglish
Pages (from-to)104-110
Number of pages7
JournalJournal of Molecular Liquids
Volume280
DOIs
Publication statusPublished - 15 Apr 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

choline
boric acids
Boric acid
Choline
Water content
moisture content
Melting
chlorides
melting
Eutectics
eutectics
Chemical analysis
Melting point
Water
melting points
Viscosity
Boron
viscosity
water
Diffractometers

Keywords

  • deep eutectic solvent
  • low-melting mixture
  • choline chloride
  • boric acid
  • gutmann acceptor number
  • water influence

Cite this

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title = "Effect of composition and water content on physicochemical properties of choline chloride-boric acid low-melting mixtures",
abstract = "Deep eutectic solvents are potential alternatives to volatile petrochemical solvents because they are comparatively inexpensive and easy to prepare. Further, the melting point of eutectic solvents may drop remarkably when mixing two components, the hydrogen bond donor and acceptor, together. A systematic study of these mixtures can foster the development of new design solvents for numerous industrial applications. This study presents a detailed characterization and effect of water on low-melting mixtures consisting of choline chloride and boric acid. The results indicate that a eutectic point occurred in 1:1 ratio, with a melting point of 21 °C. In all mixtures, viscosities showed non-Newtonian behaviour. The findings suggest a specific amount of water can reduce viscosity, density, energy of activation, and acidity of these mixtures. Additionally, Nuclear Magnetic Resonance, Fourier-transform infrared spectroscopy and X-ray Diffractometer were used to characterize the mixtures. The results suggest that the coordination of boron changed as the amount of choline chloride and water increased.",
keywords = "deep eutectic solvent, low-melting mixture, choline chloride, boric acid, gutmann acceptor number, water influence",
author = "Riina H{\"a}kkinen and Pia Willberg-Keyril{\"a}inen and Jarmo Ropponen and Tommi Virtanen",
year = "2019",
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T1 - Effect of composition and water content on physicochemical properties of choline chloride-boric acid low-melting mixtures

AU - Häkkinen, Riina

AU - Willberg-Keyriläinen, Pia

AU - Ropponen, Jarmo

AU - Virtanen, Tommi

PY - 2019/4/15

Y1 - 2019/4/15

N2 - Deep eutectic solvents are potential alternatives to volatile petrochemical solvents because they are comparatively inexpensive and easy to prepare. Further, the melting point of eutectic solvents may drop remarkably when mixing two components, the hydrogen bond donor and acceptor, together. A systematic study of these mixtures can foster the development of new design solvents for numerous industrial applications. This study presents a detailed characterization and effect of water on low-melting mixtures consisting of choline chloride and boric acid. The results indicate that a eutectic point occurred in 1:1 ratio, with a melting point of 21 °C. In all mixtures, viscosities showed non-Newtonian behaviour. The findings suggest a specific amount of water can reduce viscosity, density, energy of activation, and acidity of these mixtures. Additionally, Nuclear Magnetic Resonance, Fourier-transform infrared spectroscopy and X-ray Diffractometer were used to characterize the mixtures. The results suggest that the coordination of boron changed as the amount of choline chloride and water increased.

AB - Deep eutectic solvents are potential alternatives to volatile petrochemical solvents because they are comparatively inexpensive and easy to prepare. Further, the melting point of eutectic solvents may drop remarkably when mixing two components, the hydrogen bond donor and acceptor, together. A systematic study of these mixtures can foster the development of new design solvents for numerous industrial applications. This study presents a detailed characterization and effect of water on low-melting mixtures consisting of choline chloride and boric acid. The results indicate that a eutectic point occurred in 1:1 ratio, with a melting point of 21 °C. In all mixtures, viscosities showed non-Newtonian behaviour. The findings suggest a specific amount of water can reduce viscosity, density, energy of activation, and acidity of these mixtures. Additionally, Nuclear Magnetic Resonance, Fourier-transform infrared spectroscopy and X-ray Diffractometer were used to characterize the mixtures. The results suggest that the coordination of boron changed as the amount of choline chloride and water increased.

KW - deep eutectic solvent

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KW - choline chloride

KW - boric acid

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KW - water influence

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