Journal ArticleDOI
Adsorption of Charged Colloid Particles to Charged Liquid Surfaces
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TLDR
In this paper, a thermodynamic model for the adsorption of charged colloidal particles to air−water and oil−water interfaces from water-based suspensions is presented, where the effects of electrolyte concentration, surface charge density of both the particles and the air-water (oil−water) interface, particle contact angle, and particle volume fraction are studied in detail.Abstract:
In this paper we present a thermodynamic model for the adsorption of charged colloidal particles to air−water and oil−water interfaces from water-based suspensions and derive the equations for the respective particle adsorption isotherms. The effects of electrolyte concentration, surface charge density of both the particles and the air−water (oil−water) interface, particle contact angle, and particle volume fraction are studied in detail. The model is based on a detailed account of the interfacial free energy of particles and electric double layer formation, as well as collective effects related to the free energy of mixing of the particles with the liquid phases (water and oil) and surface charge displacement. The effect of particle size on the adsorption at the air−water and the oil−water interfaces is discussed. An analytical expression for the distribution coefficient of particles between oil and water has been derived and discussed in terms of the effects of electrolyte, contact angle, surface charge...read more
Citations
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Emulsions stabilised solely by colloidal particles
TL;DR: In this paper, the free energy of formation of emulsion drops covered with close-packed monolayers of monodisperse spherical particles was investigated and the possibility of preparing novel solid materials by evaporating solid-stabilised emulsions is also proposed.
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Aqueous foams stabilized solely by silica nanoparticles.
Journal ArticleDOI
Foam stability: proteins and nanoparticles
Brent S. Murray,Rammile Ettelaie +1 more
TL;DR: This review has summarised the current state of knowledge surrounding the effects of particles as stabilizers of foams, in the context of food systems.
Journal ArticleDOI
Effect of nanoparticles on the interfacial properties of liquid/liquid and liquid/air surface layers.
TL;DR: An important role in the mixed particle-surfactant layer reorganization is played by the Brownian transport of particles from the bulk to the interface and by the surfactant redistribution between the particle and fluid interface.
Journal ArticleDOI
Novel Method for Determining the Three-Phase Contact Angle of Colloid Particles Adsorbed at Air−Water and Oil−Water Interfaces
TL;DR: In this article, a conceptually novel method has been developed for determining the three-phase contact angle of solid colloid particles adsorbed at the air−water or oil−water interface.
References
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Journal ArticleDOI
Particles as surfactants—similarities and differences
TL;DR: In this paper, the authors compare the behavior observed in systems containing either particles or surfactant molecules in the areas of adsorption to interfaces, partitioning between phases and solid-stabilised emulsions and foams.
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Stabilization of emulsions by fine particles I. Partitioning of particles between continuous phase and oil/water interface
TL;DR: In this paper, the thermodynamics of particle partitioning between a continuous aqueous phase and the oil/water interfaces of the emulsion droplets are analyzed, and an isolated particle with an appropriate three-phase contact angle is trapped in a deep energy well at the interface of an oil and water emulsion.
Journal ArticleDOI
Effects of oil type and aqueous phase composition on oil–water mixtures containing particles of intermediate hydrophobicity
Bernard P. Binks,S. O. Lumsdon +1 more
TL;DR: In this article, the behavior of stabilised by partially hydrophobic spherical silica particles is described for systems where the oil type is varied in mixtures with water, and for toluene-containing systems in which water is replaced by other polar solvents.
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Particle—fluid interactions with application to solid-stabilized emulsions part I. The effect of asphaltene adsorption
V.B. Menon,Darsh T. Wasan +1 more
TL;DR: In this paper, the effect of asphaltenes on the contact angle at the water/oil/solid interface and on the zeta potential of the particles was investigated, and the hydrophobic nature of the solids was found to be directly related to the amount of adsorbed on their surface.
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Mechanisms of aqueous foam stability in the presence of emulsified non-aqueous-phase liquids: structure and stability of the pseudoemulsion film
L.A. Lobo,Darsh T. Wasan +1 more
TL;DR: In this paper, the influence of the emulsified oil drops on the stability of an aqueous foaming system is investigated at the thin film level, and it is found that the film thins in discrete steps, which is indicative of the presence of an ordered micellar structure within the film.