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Measurement of relative static permittivity and solvatochromic parameters of binary and ternary CO2-expanded green solvents

Cui, Jingwen LU ; Norberg, Mynta ; Andersson, Martin ; Klintberg, Lena ; Sandahl, Margareta LU ; Cunico, Larissa P. LU and Turner, Charlotta LU orcid (2021) In Journal of Supercritical Fluids 171.
Abstract

CO2-expanded liquids (CXLs) is a class of solvent systems giving relatively low viscosity in comparison to neat organic solvents. The challenge is to achieve a high overall polarity of the CXL, despite the presence of compressed liquid CO2. In this study, the relative static permittivity (εr) was measured for binary and ternary one-phase mixtures of CO2 + green solvent using an in-line microfluidic device. In addition, Kamlet-Taft solvatochromic parameters were experimentally determined, allowing the characterization of the polarizability, acidity, and basicity. Novel data is shown for binary and ternary systems of CO2 expanded ethanol and ethyl lactate, with or without glycerol or... (More)

CO2-expanded liquids (CXLs) is a class of solvent systems giving relatively low viscosity in comparison to neat organic solvents. The challenge is to achieve a high overall polarity of the CXL, despite the presence of compressed liquid CO2. In this study, the relative static permittivity (εr) was measured for binary and ternary one-phase mixtures of CO2 + green solvent using an in-line microfluidic device. In addition, Kamlet-Taft solvatochromic parameters were experimentally determined, allowing the characterization of the polarizability, acidity, and basicity. Novel data is shown for binary and ternary systems of CO2 expanded ethanol and ethyl lactate, with or without glycerol or water added, at moderate conditions of pressure and temperature (8 MPa and 35 °C). One-phase CXLs systems of a wide relative permittivity range (7.7–75.3) at lowered viscosity were enabled, by mixing different green solvents with CO2.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Binary and ternary solvents, CO-expanded liquids, Green solvent, Kamlet-Taft solvatochromic parameters, Relative static permittivity
in
Journal of Supercritical Fluids
volume
171
article number
105196
publisher
Elsevier
external identifiers
  • scopus:85101340247
ISSN
0896-8446
DOI
10.1016/j.supflu.2021.105196
language
English
LU publication?
yes
id
cd8a00c4-b0ad-471d-ae83-3dbf02a227a9
date added to LUP
2021-03-08 12:14:02
date last changed
2024-05-02 04:27:45
@article{cd8a00c4-b0ad-471d-ae83-3dbf02a227a9,
  abstract     = {{<p>CO<sub>2</sub>-expanded liquids (CXLs) is a class of solvent systems giving relatively low viscosity in comparison to neat organic solvents. The challenge is to achieve a high overall polarity of the CXL, despite the presence of compressed liquid CO<sub>2</sub>. In this study, the relative static permittivity (ε<sub>r</sub>) was measured for binary and ternary one-phase mixtures of CO<sub>2</sub> + green solvent using an in-line microfluidic device. In addition, Kamlet-Taft solvatochromic parameters were experimentally determined, allowing the characterization of the polarizability, acidity, and basicity. Novel data is shown for binary and ternary systems of CO<sub>2</sub> expanded ethanol and ethyl lactate, with or without glycerol or water added, at moderate conditions of pressure and temperature (8 MPa and 35 °C). One-phase CXLs systems of a wide relative permittivity range (7.7–75.3) at lowered viscosity were enabled, by mixing different green solvents with CO<sub>2</sub>.</p>}},
  author       = {{Cui, Jingwen and Norberg, Mynta and Andersson, Martin and Klintberg, Lena and Sandahl, Margareta and Cunico, Larissa P. and Turner, Charlotta}},
  issn         = {{0896-8446}},
  keywords     = {{Binary and ternary solvents; CO-expanded liquids; Green solvent; Kamlet-Taft solvatochromic parameters; Relative static permittivity}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Supercritical Fluids}},
  title        = {{Measurement of relative static permittivity and solvatochromic parameters of binary and ternary CO<sub>2</sub>-expanded green solvents}},
  url          = {{http://dx.doi.org/10.1016/j.supflu.2021.105196}},
  doi          = {{10.1016/j.supflu.2021.105196}},
  volume       = {{171}},
  year         = {{2021}},
}