Showing papers in "Journal of Colloid and Interface Science in 1986"

TL;DR: In this paper, the thermodynamic nature of interfaces and of adhesion is reexamined in the light of the Lifshitz theory of the forces acting across condensed phases, and a new term is proposed, γLW, which consists of the sum of the terms heretofore ascribed to London, Debye, and Keesom forces, LW referring to lifshitz-van der Waals.

TL;DR: The static shear modulus of a series of concentrated, well-characterized oil-in-water emulsions has been determined and is found to accurately represent G = 1.769 σ R 32 φ 1 3 (φ − 0.712), where σ is the interfacial tension, R32 is the surface-volume mean drop radius, and φ is the volume fraction of the dispersed phase as mentioned in this paper.

TL;DR: In this article, the fractal dimension of coal and char samples was determined from the relation dV p dP ∝ P D−4, where P is the pressure, and three pressure regimes were indicated by distinct values of D; in order of increasing pressure, these correspond to interparticle penetration, pore penetration and sample compressibility.

TL;DR: In this paper, the interface between human tissue and implants of titanium and stainless steel has been studied and the changes of the oxide thickness and nature depend on the location of the implant in the body.

TL;DR: For this purpose, antisera containing a set of antibodies to a specific human protein appear more useful to identify the protein than any monoclonal antibody that would provide information on specific groups remaining or becoming exposed as a specific protein is adsorbed.

TL;DR: In this article, the pristine point of zero charge (PPZC) may well be a function of the degree of surface heterogeneity, and the shape of the surface charge (σ 0)-pH curves is very insensitive towards the degree heterogeneity.

TL;DR: In this paper, the zeta-potential of microbubbles in the 40-to 80-μm size range have been determined by means of a simple microelectrophoresis technique.

TL;DR: In this article, the formation of high temperature aerosol agglomerates is simulated by following the Langevin trajectory of each particle with the boundary condition that the particles stick upon collision.

TL;DR: In this article, a simple two-component model of adsorption involving PO43 or CaPO4− and HPO42− or CaHPO40 has been applied to the coprecipitation of phosphate with calcite at various precipitation rates and in a temperature range of 5 to 25°C.

TL;DR: Aqueous diffusivity of macromolecules of natural and synthetic origin in dilute solution (10−20 mg/liter) were estimated by measuring external mass transfer coefficients in a short fixed-bed activated carbon column as mentioned in this paper.

TL;DR: In this article, the results obtained through the use of the well-known Smoluchowski formula are compared with those deduced from a more elaborated treatment (R. W. O'Brien and L. R. White, J. Faraday Trans. Chem. Soc. 2 74, 1607, 1978) of electrophoresis.

TL;DR: In this paper, the authors used FTIR spectroscopy and contact angle measurements to determine the characteristic time scales of formation of some representative oleophobic monolayers produced on polar solids by spontaneous adsorption from organic solutions, and investigate the mechanis of solvent incorporation into such organized films during their formation and its subsequent release.

TL;DR: The condensation polymerization between silicic acid and silica surfaces has been studied in the absence of nucleation, by seeding silic acid solutions with colloidal amorphous silica particles of known surface area.

TL;DR: In this article, the rheological properties of aqueous dispersions of Laponite-RD, a synthetic hectorite-type swelling clay, have been studied at low ionic strength with a Weissenberg rheogoniometer.

TL;DR: In this paper, the authors investigated the dielectric response of a colloid in which the particle radius a is much greater than the double-layer thickness κ −1 and showed that such colloids exhibit two types of dielectrics dispersion: one at frequencies of order D / a 2, and the other at higher frequency of order κ 2 D where D is the ion diffusivity.

TL;DR: In this article, a model of the fouling of reverse osmosis membranes by colloidal material has been developed for laminar flow and compared with the experimental results of colloidal ferric hydroxide.

TL;DR: In this paper, a dynamic model of the Stern layer was used to depict the electrophoretic mobility of individual particles and electrical conductivity of a suspension over a wide range of electrolyte concentrations, and the discrepancy between the ζ potentials (or surface charge densities) inferred from applying the standard theory (which omits the surface transport of ions) to mobility and conductivity measurements is due to the fact that lateral transport in the Sternlayer acts so as to reduce the effective electric force on a small particle, which reduces the apparent charge, whereas such transport affects the

TL;DR: In this article, a formalism is developed to investigate the instability and the time of rupture of thin films which are subjected to finite amplitude perturbations, and the analytical expressions for a thin film devoid of surfactants are in good agreement with the numerical calculations of Williams and Davis.

TL;DR: In this paper, the effect of n-alkanols from C1 to C5 on both equilibrium and dynamic properties of SDS micellar solutions has been investigated using electrical conductivity and pressure jump methods.

TL;DR: In this article, the adsorption of uranyl species onto a well-characterized hematite sol has been studied in the presence of bicarbonate ions and it was shown that the uptake of uranium decreases abruptly with increasing solution pH.

TL;DR: In this paper, the effect of the addition of alkanols on the micellization of various surfactant molecules has been investigated using a molecular thermodynamic approach and the calculated values of the CMC are in agreement with experimental values reported in the literature.

TL;DR: In this article, the adsorption of two cationic polyelectrolytes onto carboxymethylated fibers of cellulosic pulp and rayon has been studied both by equilibrium measurements and in dynamic experiments with consecutive addition of the poly electrolyte.

TL;DR: In this paper, sterically stabilized poly(methylmethacrylate) (PMMA) particles were dispersed in silicone fluids of different viscosities, at concentrations up to 45% by volume.

TL;DR: Results indicate that platelet deposition and thrombus formation are strongly influenced by the sequence of protein adsorption.

TL;DR: In this paper, the influence of reaction conditions of the silylation and the effect of subsequent heat treatment and water addition were studied, and the resulting differences shed new light on the combined effects of reaction condition and silica surface structures on the course of the reactions.

TL;DR: In this paper, the levitation of a single micrometer-sized particle in a controlled water vapor environment is shown to be a novel experimental technique for measuring the thermodynamic properties of concentrated electrolyte solutions.

TL;DR: In this paper, photon correlation spectroscopy (PCS) and small angle neutron scattering (SAS) were used to determine the adsorbed amounts of polystyrene latex particles.

TL;DR: In this article, the dynamic drop volume method is introduced for measuring dynamic interfacial tensions at the oil/water interface, and experiments were performed for nonionic surfactants solved in aqueous phase, resulting in diffusion controlled (eventually with rapid demicellization) adsorption kinetics.

TL;DR: Etudes de la force et des criteres de rupture du pont liquide entre 2 spheres, dans un champ gravitationnel as discussed by the authors, in 2 spheres.

TL;DR: In this article, stable sols of ruthenium, rhodium, palladium, platinum, silver, and gold were prepared from aqueous solutions of the corresponding noble metal salts by reduction with sodium borohydride in the presence of three different types of surfactants, stearyltrimethylammonium chloride (SC), sodium dodecylbenzenesulfonate (SD), and polyethylene glycol mono-p-nonylphenyl ether (PN).