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Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa

Density and dielectric spectra have been measured in the liquid phase of dimethyl ether (DME)–ethanol by an oscillating U-tube densimeter and a complex dielectric spectrometer under 1.00 MPa. The density was measured at 303.15 and 313.15 K and converted to the excess molar volume. The excess molar v...

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Main Authors: Hoshina, Taka-Aki, Sato, Kazunori, Okada, Masaki, Tsuji, Tomoya, Hiaki, Toshihiko
Format: Article
Published: Springer Nature 2024
Subjects:
Q Science (General)
Online Access:http://eprints.utm.my/108934/
http://dx.doi.org/10.1007/s10953-023-01329-5
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spelling my.utm.1089342024-12-15T06:09:23Z http://eprints.utm.my/108934/ Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa Hoshina, Taka-Aki Sato, Kazunori Okada, Masaki Tsuji, Tomoya Hiaki, Toshihiko Q Science (General) Density and dielectric spectra have been measured in the liquid phase of dimethyl ether (DME)–ethanol by an oscillating U-tube densimeter and a complex dielectric spectrometer under 1.00 MPa. The density was measured at 303.15 and 313.15 K and converted to the excess molar volume. The excess molar volumes were no smaller than − 0.880 and − 0.909 cm3·mol–1 at 303.15 and 313.15 K, respectively. The mole fraction dependence can be correlated with the Redlich–Kister equation, whose minimum was found to be around 0.58 for the mole fraction of DME. The dielectric constant and the dielectric relaxation time were evaluated from the complex dielectric spectra in the frequency range from 0.5 to 18 GHz at (293.2–313.2) K and 1.00 MPa. The dielectric constants and the relaxation time were decreased with the mole fraction of DME, and the latter tended to be around 25 ps in the mole fraction range higher than 0.6. The logarithmic dielectric constants can be correlated with a similar function to the Hildebrand equation with the volume fraction. The effective Kirkwood g-factor was evaluated at 293.2–313.2 K and 1.00 MPa. The g-factors were given by two linear functions crossed around 0.6 for the mole fraction of DME. Considering an atomic composition (C2H6O), the molecular sizes are not so different for DME and ethanol. Then, the solution structure was thought to be microscopically changed around 0.6 for the mole fraction of DME. The mole fraction will be utilized to switch the solubility to extract amphipathic compounds. Springer Nature 2024 Article PeerReviewed Hoshina, Taka-Aki and Sato, Kazunori and Okada, Masaki and Tsuji, Tomoya and Hiaki, Toshihiko (2024) Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa. Journal of Solution Chemistry, 53 (2). pp. 278-293. ISSN 0095-9782 http://dx.doi.org/10.1007/s10953-023-01329-5 DOI:10.1007/s10953-023-01329-5
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science (General)
spellingShingle Q Science (General)
Hoshina, Taka-Aki
Sato, Kazunori
Okada, Masaki
Tsuji, Tomoya
Hiaki, Toshihiko
Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa
description Density and dielectric spectra have been measured in the liquid phase of dimethyl ether (DME)–ethanol by an oscillating U-tube densimeter and a complex dielectric spectrometer under 1.00 MPa. The density was measured at 303.15 and 313.15 K and converted to the excess molar volume. The excess molar volumes were no smaller than − 0.880 and − 0.909 cm3·mol–1 at 303.15 and 313.15 K, respectively. The mole fraction dependence can be correlated with the Redlich–Kister equation, whose minimum was found to be around 0.58 for the mole fraction of DME. The dielectric constant and the dielectric relaxation time were evaluated from the complex dielectric spectra in the frequency range from 0.5 to 18 GHz at (293.2–313.2) K and 1.00 MPa. The dielectric constants and the relaxation time were decreased with the mole fraction of DME, and the latter tended to be around 25 ps in the mole fraction range higher than 0.6. The logarithmic dielectric constants can be correlated with a similar function to the Hildebrand equation with the volume fraction. The effective Kirkwood g-factor was evaluated at 293.2–313.2 K and 1.00 MPa. The g-factors were given by two linear functions crossed around 0.6 for the mole fraction of DME. Considering an atomic composition (C2H6O), the molecular sizes are not so different for DME and ethanol. Then, the solution structure was thought to be microscopically changed around 0.6 for the mole fraction of DME. The mole fraction will be utilized to switch the solubility to extract amphipathic compounds.
format Article
author Hoshina, Taka-Aki
Sato, Kazunori
Okada, Masaki
Tsuji, Tomoya
Hiaki, Toshihiko
author_facet Hoshina, Taka-Aki
Sato, Kazunori
Okada, Masaki
Tsuji, Tomoya
Hiaki, Toshihiko
author_sort Hoshina, Taka-Aki
title Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa
title_short Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa
title_full Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa
title_fullStr Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa
title_full_unstemmed Volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) K and 1.00 MPa
title_sort volumetric and dielectric properties in liquid phase of dimethyl ether-ethanol at (293.2-313.2) k and 1.00 mpa
publisher Springer Nature
publishDate 2024
url http://eprints.utm.my/108934/
http://dx.doi.org/10.1007/s10953-023-01329-5
_version_ 1818834068241907712
score 13.223943

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