Abstract

Interference and ellipsometric methods were used to measure the equilibrium thicknesses of wetting films (50–70 nm) of aqueous solutions of CTAB and NaCI. The experimental isotherms of disjoining pressure of wetting films agree with the results of calculations performed according to the theory of electrostatic forces acting between film surfaces whose potentials differ in value. The ranges of the stability, metastability, and instability of the films were determined. The rupturing of metastable films is accompanied by a transition from complete to partial wetting.

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