The relationships between the tension Δ of a thin liquid film, the disjoining pressure Π in it, and the contact angle θ between the thin film and bulk liquid with which the film is in equilibrium, are considered. The possibility of measuring θ is discussed and two methods are suggested : (a) a “topographic method” suitable for the measurement of small θ, and (b) an “extension method” for larger θ. Both methods refer to microscopic films in hanging biconcave drops.
No takes yet. Share an insight, caveat, or question.
Scheludko et al. (1968) studied this question.