Showing papers in "Journal of Colloid and Interface Science in 1971"

TL;DR: In this paper, a flat fluid interface moving steadily over a flat solid is modeled with the creeping flow approximation, which turns out to be self-consistent, and the role of long-range forces are explored with the aid of the lubrication flow approximation.

TL;DR: In this article, a single fiber was drawn out from the electrically charged drop which was suspended from a metal capillary, and the effects on fiber diameter and jet length of solution viscosity, surrounding gas, flow rate, voltage, and geometry were determined.

TL;DR: In this paper, the activation energy for crystal growth is 11.0 ± 1.0 kcal mole−1, and the rate is independent of the stirring rate, and photomicrographic evidence is presented in support of the suggestion that the initial surge in the growth curves results from additional nucleation at the surface of the added calcite crystals and in the bulk of the supersaturated solution.

TL;DR: In this article, a rigorous formulation for the rate of capillary penetration by a liquid is presented, and the resultant differential equation is solved numerically, which explains an apparent anomaly posed by the Washburn equation.

TL;DR: In this article, an expression for the "particle capture limit", i.e., the range of system properties such as particle size, velocity, and interaction energy within which particle capture will occur, is derived.

TL;DR: In this article, the interaction between polyvinylpyrrolidone (PVP) and sodium alkyl sulfate (RSO 4 Na) in 0.1 N NaCl solution has been studied by surface tension, dialysis equilibrium, and solubilization.

TL;DR: The solute effects described in this paper suggest a possible experimental test of the hypothesis that the thermal destruction of a biopolymer's hydration sheath might provide the basis of temperature control in homeothermic animals.

TL;DR: In this paper, the interfacial tension between the two aqueous phases of dextran water systems was determined by the rotating drop method, and a linear relationship between the logarithm of the inter-phase tension and the length of the tie line of the phase diagram was found.

TL;DR: In this article, the surface tension of surfactant solutions can be observed conveniently as a function of time in the 1- to 100-sec range with some modifications of the normal maximum bubble pressure method.

TL;DR: In this paper, the adsorption of n -alkyltrimethylammonium ions on polystyrene surfaces has been examined, using samples of poly styrene prepared by bulk polymerization and by emulsion polymerization.

TL;DR: In this paper, the variation of the zeta potential of oxides, as a function of electrolyte concentration, has been investigated using typical values of the double-layer parameters (e.g., thickness and dielectric constant of the compact region).

TL;DR: In this paper, an apparatus was built for measuring the charge and mass of individual liquid drops at the Rayleigh stability limit, and the measured charge to mass ratios of the drops at breakup were the same as the RSL within a standard deviation of 4%.

TL;DR: In this paper, a random sphere packing in terms of tetrahedral subunits is described and a method of generating these tetrahedra is given, and the properties of an assembly of these subunits give results which agree well with known properties of random sphere packings.

TL;DR: In this article, the relationship between interface shape and velocity is predicted analytically for the particular case of a liquid displacing a gas in a round tube, and it is shown that the commonly used methods for measuring dynamic contact angle are not satisfactory, in general, since they are sensitive to the influence of hydrodynamic forces on the interface shape.

TL;DR: The detailed adsorption isotherms of five isomers of sodium dodecylbenzene sulfonate at the alumina-water interface have been determined as a function of concentration and pH as mentioned in this paper.

TL;DR: By entraining of gas bubbles in dilute surfactant solution, it is possible to form emulsions of gas in water, which, if the bubbles are small enough, have an appreciable, if limited, lifetime.

TL;DR: In this paper, a dilatometric study of the crystallization of calcium sulfate dihydrate from aqueous solution at 30°C in the absence of added seed crystals indicated that nucleation was heterogeneous.

TL;DR: In this paper, the surface free energy of a mixture of simple liquids is derived from the Hansen parameters from London force energy, polar energy, and hydrogen-bonding energy, which are used to relate the free energy to the energy of vaporization.

TL;DR: In this paper, the effects of mixed surfactants on various interfacial phenomena are described, and it is proposed that these striking changes are due to two-dimensional hexagonal packing of molecules resulting in a closer molecular packing and a greater stability of mixed films at interfaces.

TL;DR: In this article, the stabilities of the silica hydrosols Ludox HS and Ludox AM have been studied as a function of pH in the presence of various concentrations of several hydrolyzable electrolytes.

TL;DR: In this article, the infrared attenuated total reflection (ATR) spectra of molecular layers of stearic acid built upon the germanium plate by the Blodgett method were studied by using the polarized radiations with the electric vectors parallel and perpendicular to the plane of incidence.

TL;DR: In this paper, three iron-dextran complexes used as parenteral hematinic agents were studied by physical techniques and the presence of an electron-transparent sheath around the electron-dense, iron-containing core of the particles was revealed.

TL;DR: In this paper, the experimental conditions which lead to the formation of chromium hydroxide sols of narrow size distributions were described and the stability of the sols so prepared was studied in the presence of various electrolytes.

TL;DR: In this paper, the α s -method was used to analyze the isotherms of argon, nitrogen, and water vapor on alpha-alumina and calcined chromium oxide gels, and it was suggested that the nitrogen molecule occupies an average area of about 18 A 2 in the localized monolayer instead of the usual value of 16.2 A 2.

TL;DR: In this article, the dielectric behavior of water adsorbed on Na-montmorillonite and γ-alumina oxide was determined at a microwave frequency of 9.8 × 10 9 Hz and over the temperature range from +20°C to −100°C.

TL;DR: A survey of studies on the association processes, the changes in structure and the formation of micelles in solutions of alkali metal salts of various carboxylic acids can be found in this paper.

TL;DR: In this article, it was shown that the first adsorbed layer formed during two-dimensional condensation is an expanded (111) plane of the fcc solid adsorbate.

TL;DR: In a laboratory study of the wettability of plane surfaces of enamel, dentine, and some common restorative dental materials as judged from contact angles the following observations were made:

TL;DR: In this article, the effect of the size and distribution of the hydrophilic chain lengths of polyoxyethylene nonylphenylethers and polyoxethylene dodecylbenzene sulfonate on the stability of O/W and W/O type emulsions was studied, using emulsifiers with the same phase inversion temperatures (PIT's).

TL;DR: In this article, the surface viscosity of macromolecular, non-Newtonian solutions was investigated using the deep-channel surface viscometer and the assumption of a rectilinear channel to represent the circular channel and of no gap between the channel walls and the floor of the dish was investigated.