Investigation of the Neumann triangle for dodecane liquid lenses on water

Liquid lenses of dodecane resting on a water surface are imaged and analyzed computationally. The equilibrium condition for the three-phase line is a vector balance of three interfacial tensions known as the Neumann triangle. Measurement of the interfacial tensions, and two angles, allows the relati...

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Vydané v:Colloids and surfaces. A, Physicochemical and engineering aspects Ročník 333; číslo 1; s. 12 - 18
Hlavní autori: David, Robert, Dobson, Stephanie M., Tavassoli, Zahra, Cabezas, M. Guadalupe, Neumann, A. Wilhelm
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Kidlington Elsevier B.V 05.02.2009
Elsevier
Predmet:
Chemistry
Colloidal state and disperse state
Contact angle
Exact sciences and technology
General and physical chemistry
Interfacial tension
Line tension
Liquid lens
Neumann triangle
Surface physical chemistry
Line tension
Liquid lens
Contact angle
Neumann triangle
Interfacial tension
Water
Liquid
Thermodynamics
Dodecane
Interface tension
Liquid lens;Line tension
Equilibrium condition
Physicochemical properties
ISSN:0927-7757, 1873-4359
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Popis
Shrnutí:Liquid lenses of dodecane resting on a water surface are imaged and analyzed computationally. The equilibrium condition for the three-phase line is a vector balance of three interfacial tensions known as the Neumann triangle. Measurement of the interfacial tensions, and two angles, allows the relation to be verified. Despite use of purified dodecane and the highest accuracy methods currently available at the millimetre length scale, a discrepancy with the Neumann triangle is found. The results, as well as literature data, are not consistent with interpretation as a thermodynamic line tension or as a pseudo-line tension. Alternative possibilities are briefly discussed.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2008.09.018