Generalised line tension theory revisited

摘要: Abstract A generalised thermodynamic theory of the line tension in thin liquid films and layers [1] , [2] is reviewed light numerical computation values sign function shape disjoining pressure isotherm physico-chemical parameters. The depends on parameters characterising Π(H) films, as well contact angle, capillary Pc interaction free energy (the grand potential) ΔΩHf film thickness Hf. most significant effect its produced by Π(H)-isotherm rather than absolute value ΔΩHf, i.e. angle θf. Π(H)-isotherms with only one coagulation minimum or barrier lead to tensions negative positive signs, respectively. It a general rule that coincides for these simple Π(H)-isotherms. As soon either added near minimum, appears besides barrier, tends change. signs both, τ, characterise Π(H)-isotherm. This justifies efforts directed towards an experimental determination tension, since knowledge this parameter should provide new information isotherm.