Experimental Study of Surface Solvation in Developing a Mathematical Theory of Stable Lyophilic Colloids
Abstract
A new method is described for measuring the thickness and disjoining effect of thin layers, for the case where these are boundary layers between a ly ophilic solid and a gas bubble. Further observations are reported on the nonequilibrium state of such wetting films. Experimental data are given which establish an equation for the state of a solvate layer expressing the equilibrium pressure (disjoining action) of this layer as a function of layer thickness, for both aqueous and nonaqueous media. The effect of electrolytes on the thickness h of a solvate film is described, as well as the effect of surface-active substances on a vaseline oil film solvating the surface of steel. A theory of micelle interaction is given which takes account of the disjoining effect pro duced by thin layers of the dispersion medium separating adjacent surfaces. Finally, these last calculations are used to develop a theory of slow coagulation and stability of colloids in disperse systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 22, 1963
- Accession Number
- AD0409072
Entities
People
- B. Deryagin
- M. Kusakov
Organizations
- National Air and Space Intelligence Center