Surface thermodynamic functions of dilute solutions of methylcyclohexanols in ethylene glycol

Surface thermodynamic functions (surface entropy, surface enthalpy, and surface composition) of dilute solutions of 2-, 3-, and 4-methylcyclohexanol in ethylene glycol were obtained using surface tension measurements at various temperatures. Surface excess values and surface mole fractions were obta...

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Published inJournal of colloid and interface science Vol. 286; no. 1; pp. 349 - 354
Main Authors Azizian, Saeid, Bashavard, Nowrouz
Format Journal Article
LanguageEnglish
Published San Diego, CA Elsevier Inc 01.06.2005
Elsevier
Subjects
Chemistry
Clathrate-like solvates
Ethylene glycol
Exact sciences and technology
General and physical chemistry
Methylcyclohexanol
Surface tension
Surface thermodynamics
Ethylene glycol
Clathrate-like solvates
Surface tension
Surface thermodynamics
Methylcyclohexanol
Thermodynamics
Thermodynamic function
Ethylene
Dilute solution
Physicochemical properties
Glycol
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Summary:Surface thermodynamic functions (surface entropy, surface enthalpy, and surface composition) of dilute solutions of 2-, 3-, and 4-methylcyclohexanol in ethylene glycol were obtained using surface tension measurements at various temperatures. Surface excess values and surface mole fractions were obtained from Gibbs equation and extended Langmuir model respectively. The results show that all methylcyclohexanols are surface active in ethylene glycol. The lyophobicity of solutes decreases with increasing temperature. The presence of a maximum point in the surface entropy diagram in all systems is explained by the formation of clathrate-like solvates at the surface of these systems.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2005.01.040