Showing papers in "Journal of Colloid and Interface Science in 1973"

TL;DR: In this article, an optical interference method is described for measuring thickness and refractive index profiles of thin films trapped between two transparent deformable sheets, which is most suitable for studying very thin films whose thicknesses range from zero to a few thousand angstroms (thickness resolution ∼1 A).

TL;DR: In this article, the amphoteric properties of hydrous γ-Al2O3 and the distribution of earth alkaline cations in the oxide-electrolyte interface were evaluated from alkalimetric and acidimetric titration curves of aqueous dispersions.

TL;DR: In this article, a simple light scattering technique was used to obtain the relative rates of flocculation and optimum flocculant concentrations, under given conditions the optimum concentration was independent of the molecular weight of the polymer.

TL;DR: In this article, the field aperture iris of a modified metallurgical microscope is used as a pinhole of about 0.1 mm in diameter to reduce the background caused by scattered light from the latex particles themselves.

TL;DR: In this paper, the interaction between ionic and anionic surfactants and polyglycol ethers in water was investigated and it was shown that only weak reversible hydrophobic bonding between anionic and cationic groups formed, increasing with the hydrophilic character of the anionic group and a decrease in temperature.

TL;DR: In this paper, it was confirmed from the studies of phase diagrams that Schulman's so-called micromulsion is not an emulsion, but a solubilized solution.

TL;DR: In this article, negative aluminosilicate ion sites on the surface prevent the approach of hydroxyl ions which are required to catalyze the dissolution of amorphous silica.

TL;DR: Extensions have been made to the Vold Approach for calculating the van der Waals attraction between colloid particles with adsorbed layers as mentioned in this paper, and new equations to allow for the retardation effect are presented.

TL;DR: The surface tension of aqueous solutions of higher alcohols is measured as a function of temperature at constant pressure and mole fraction, and the heat of reversible extension of the surface area vanishes at this minimum as mentioned in this paper.

TL;DR: In this paper, a detailed study of the adsorption and desorption of bovine serum albumin, γ-globulin, and fibrinogen at physiological conditions on a series of polymer membranes, both cation exchangers and neutral, has been carried out.

TL;DR: A renewed X-ray diffraction study of the liquid crystalline lamellar phase occurring in the Aerosol OT-water system has disclosed that the variation in the fundamental repeat distance of the structure with the water content is close to that expected for a one-dimensional swelling.

TL;DR: In this paper, the effect of added gelatin upon the rate constant for crystal growth can be interpreted in terms of its adsorption, following the Langmuir isotherm at the available crystal growth sites.

TL;DR: In this paper, a simple transformation of the kinetic equation of coagulation is proposed, where new variables τ = ftc1(t′)dt′ and νg(τ) = cgc1 are introduced.

TL;DR: In this paper, a clean bed latex suspension collection has been measured in filtration through beds of packed glass beads with systematic variation of monodisperse latex particle diameter (0.7-21.0 μm), glass bead diameter ( 0.1-4.0 mm), flow rate (0,01-1.0 cm/sec), and ionic concentration (10 −1 to 10 −5.5 M ) of aqueous medium electrolyte [HNO 3, NaCl and Ca(NO 3 ) 2 ].

TL;DR: The energy of interaction between two dissimilar double layers at constant surface charge V σ has been calculated by means of the linear (Debye-Huckel) approximation as discussed by the authors.

TL;DR: In this paper, the geometry and distribution of droplets for water/polymer ratios from 1 1 to 9 1 1 were investigated using scanning electron microscope techniques, and electron micrographs confirm those models which predicts polyhedral droplet formation at high internal phase ratios.

TL;DR: In this paper, contact angles and interfacial tension have been measured in three-phase systems containing a nonpolar solid, water, and either oil or air, both in the presence and in the absence of surfactants.

TL;DR: The capacity of cations to salt in polyoxyethylated compounds runs parallel with their capacity to form complexes with simple ethers such as ethyl ether, dioxane, and cineole, and to bind water in solid hydrates.

TL;DR: In this article, a model for the zeta potential increase frequently observed when cells and other charged particles are suspended in neutral polymer solutions is proposed, where the Boltzmann equation is modified by a polymer adsorption term.

TL;DR: The Fowkes equation for the dispersion component of surface free energy agrees well with the results from the empirical methods as mentioned in this paper, but it is not suitable for a wide range of reference liquids.

TL;DR: In this article, the effect of some anions (humic acid ≈ succinate ≈ polystyrenesulfonate) is to decrease phosphate adsorption for pH < 6.

TL;DR: In this article, conditions for the formation of copper hydrous oxide dispersions of uniform size and shape are described, and the results show that these particles show cubic crystal symmetry characteristic of Cu 2 O, although their habit changes from cubic, through cuboctahedral to octahedral as the average particle size increases.

TL;DR: In this paper, the trajectory equations for non-Brownian particle motion in flow past spherical and rotating disc collectors are solved numerically to yield prediction of particle collection when particle-collector interactions are of the classical colloid type (DLVO).

TL;DR: In this paper, the glass transition temperatures of composites of four polymers containing moderate to high concentrations of silicas of different surface properties were measured by means of the torsional pendulum.

TL;DR: In this article, the technique of microelectrophoresis was used to obtain electrochemical evidence of any specific adsorption of saturated and unsaturated fatty acids and other surfactants at the Al 2 O 3 and Fe 2O 3 water interfaces.

TL;DR: In this article, a definition of X-and Y-type films is given in terms of the ratio between the area occupied by the monolayer on the solid substrate and area occupied on the aqueous surface.

TL;DR: In this paper, a dynamic method for measuring the wettability of carbon yarn has been devised which is based on the rate of wicking of a test liquid by a bundle of the yarn.

TL;DR: In this paper, the effect of temperature and added salt on the interaction between polyvinylpyrrolidone (PVP) and sodium dodecyl sulfate (SDS) has been studied by surface tension and solubilization.

TL;DR: A direct comparison between the adsorption parameter, obtained by interpreting the electrophoretic results in terms of the authors' theory, and the dextran adsorptive measurements provides substantial support for the model over the range of conditions examined.