Online citations, reference lists, and bibliographies.
Please confirm you are human
(Sign Up for free to never see this)
← Back to Search

The Role Of Surfactants On The Coalescences Of Emulsion Droplets

I. Ivanov, R. Jain, P. Somasundaran, T. T. Traykov
Published 1979 · Materials Science

Save to my Library
Download PDF
Analyze on Scholarcy
The coalescence of droplets and their life-time are shown to depend strongly on the surfactant properties _aod concentration. The following more important effects are predicted: 1) With pure liquids the energy is mainly dissipated in the droplets and the velocity of thinning, V, sho~ld not depend on the film viscosity. 2) The surfactant partition coefficient should playa crucial role on the emulsion stability. When it is soluble in the continuous phase, the surface mobility and the rate of thinning should be small and the flow in the droplet(s) could be disregarded; When the surfactant is soluble in the droplet(s), it should have no effect on the surface mobility and hence on the rate of thinning which must be much higher than it would be in the former case. 3) While the rate of thinning virtually should not depend on the surface viscosity. even values as small as 10-7 kg. s-1 would be sufficient to consider the interfaces as tangentially immobile with respect to the wave motion. 4) The film profile and hence the critical thickness at which the rupture occurs, should not depend on factors affecting to the same extent both the thinning and the wave motion. 5) The effect of the surfactant on the lifetime of the droplets is mainly due to its influence on the velocity of thinning rather th~ on the critical thickness of rupture.
This paper references
Hydrodynamics of thin liquid films Effect of surface diffusion on the rate of thinning of foam films
E. Manev (1976)
A new surface viscometer of high sensitivity. II. Experiments with stearic acid monolayers
A. Poskanzer (1975)
Hydrodynamics of thin liquid films. Experimental investigation of the effect of surfactants on the drainage of emulsion films
T. T. Traykov (1977)
Slow motion of two droplets and a droplet towards a fluid or solid interface
V. Beshkov (1978)
A fluorescence approach of the determination of translational diffusion coefficients of lipids in phospholipid monolayer at the air-water interface.
J. Teissié (1978)
Thermodynamics of thin liquid films
B. Toshev (1975)
Possible mechanism for the spontaneous rupture of thin, free liquid films
A. Vrij (1966)
R. J. Gumerman (1975)
Properties of capillary waves
E. H. Lucassen-Reynders (1970)
Dynamics of a fluid interface Equation of motion for Newtonian surface fluids
L. Scriven (1960)
Recent developments in separation science
R. Amos (1975)
Interfacial turbulence: Hydrodynamic instability and the marangoni effect
C. V. Sternling (1959)
Thin liquid films
A. Sheludko (1967)
The gravity approach and coalescence of fluid drops at liquid interfaces
G. Mackay (1963)
Effect of surfactant concentration on the critical thicknesses of liquid films
E. Manev (1974)
Hydrodynamic stability of thin spherically concentric fluid shells
J. F. Patzer (1975)
Theory of the critical thickness of rupture of thin liquid films
I. Ivanov (1970)
IV. On the theory of lubrication and its application to Mr. Beauchamp tower’s experiments, including an experimental determination of the viscosity of olive oil
O. Reynolds (1886)
Hydrodynamics of thin liquid films effect of the surfactant on the rate of thinning
B. P. Radoëv (1974)
Thermodynamics of thin liquid films
I. Ivanov (1975)
Hydrodynamics of thin liquid films. Rate of thinning of emulsion films from pure liquids
I. Ivanov (1976)
Hydrodynamics of thin liquid films. Effect of surfactants on the velocity of thinning of emulsion films
T. T. Traykov (1977)
Hydrodynamics of thin liquid films
I. Ivanov (1974)
Deformational instability of a plane interface with transfer of matter. Part 1.—Non-oscillatory critical states with a linear concentration profile
M. Hennenberg (1977)
Hydrodynamics of thin liquid films. On the rate of thinning of microscopic films with deformable interfaces
D. Dimitrov (1978)
Stability of stagnant viscous films on a solid surface
R. K. Jain (1976)

This paper is referenced by
Semantic Scholar Logo Some data provided by SemanticScholar