Ultralow interfacial tension in the vicinity of the lower critical solution temperature of the mixture of water and diethylene glycol diethyl ether

Makoto Aratono, Kinsi Motomura

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5 Citations (Scopus)

Abstract

The ultralow interfacial tension between two phases of the water and diethylene glycol diethyl ether mixture was measured at many temperatures near the lower critical solution temperature under atmospheric pressure. It was observed that the interfacial tension decreases as the temperature decreases and is reduced to zero at the critical solution temperature. By applying the thermodynamics of interfaces to the experimental results, the entropy and energy of interface formation were evaluated and compared with those of the water and isobutyric acid mixture which has an upper critical solution temperature. The entropy and energy were examined in connection with the partial molar entropy and energy changes of components associated with the transfer of component molecules between the conjugate phases, respectively.

Original languageEnglish
Pages (from-to)159-164
Number of pages6
JournalJournal of Colloid And Interface Science
Volume117
Issue number1
DOIs
Publication statusPublished - May 1987

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Glycols
Ether
Surface tension
Ethers
Water
Entropy
Temperature
Atmospheric pressure
diethylene glycol
Thermodynamics
Molecules
Acids

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Cite this

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N2 - The ultralow interfacial tension between two phases of the water and diethylene glycol diethyl ether mixture was measured at many temperatures near the lower critical solution temperature under atmospheric pressure. It was observed that the interfacial tension decreases as the temperature decreases and is reduced to zero at the critical solution temperature. By applying the thermodynamics of interfaces to the experimental results, the entropy and energy of interface formation were evaluated and compared with those of the water and isobutyric acid mixture which has an upper critical solution temperature. The entropy and energy were examined in connection with the partial molar entropy and energy changes of components associated with the transfer of component molecules between the conjugate phases, respectively.

AB - The ultralow interfacial tension between two phases of the water and diethylene glycol diethyl ether mixture was measured at many temperatures near the lower critical solution temperature under atmospheric pressure. It was observed that the interfacial tension decreases as the temperature decreases and is reduced to zero at the critical solution temperature. By applying the thermodynamics of interfaces to the experimental results, the entropy and energy of interface formation were evaluated and compared with those of the water and isobutyric acid mixture which has an upper critical solution temperature. The entropy and energy were examined in connection with the partial molar entropy and energy changes of components associated with the transfer of component molecules between the conjugate phases, respectively.

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