Wetting under chemical equilibrium and nonequilibrium conditions

Journal Article · Mon Dec 31 23:00:00 EST 1973 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100605a009· OSTI ID:6904368

Aksay, I A; Hoge, C E; Pask, J A

The thermodynamics of a solid-liquid-vapor system both under chemical equilibrium and nonequilibrium conditions, based on the model of Gibbs, is discussed. Under chemical equilibrium conditions, the degree of wetting or nonwetting of a flat and nondeformable solid by the liquid is defined by Young's equation in terms of the static interfacial tensions. Under chemical nonequilibrium conditions, mass transfer across an interface results in a transient decrease in the corresponding specific interfacial free energy and the interfacial tension by an amount equal to the free energy of the effective chemical reaction per area at that interface. When the reaction is between the solid and the liquid, this transient lowering of the interfacial tension can cause the liquid drop to spread on the solid substrate if the interfacial energy reduction is large enough and also if the diffusion rates of the reacting components in the solid phase are slow enough relative to the flow rate of the liquid to cause the liquid at the periphery of the drop to be in dynamic contact with unreacted solid.

• Research Organization: Univ. of California, Berkeley
• OSTI ID: 6904368
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 78:12; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ENERGY
EQUILIBRIUM
FLOW RATE
FLUIDS
FREE ENTHALPY
GASES
LIQUIDS
MASS TRANSFER
MATHEMATICAL MODELS
PHYSICAL PROPERTIES
SOLIDS
SURFACE PROPERTIES
SURFACE TENSION
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TIME DEPENDENCE
VAPORS
WETTABILITY