Showing papers in "Journal of Colloid and Interface Science in 1972"

TL;DR: In this paper, a detailed quantitative model for the adsorption of hydrolyzable metal ions at the oxide-water interface is presented in terms of the competition between the free energy changes faavorble to adaption, and the unfavorable change in solvation energy.

TL;DR: In this paper, the adsorption data indicate that the primary hydration sphere of free or hydrolyzed metal ions is not altered in the adaption process, and that the qualitative correlation between adsoption and hydrolysis is shown to break down when examined in detail.

TL;DR: In this paper, the effect of surface heterogeneity on contact angles was studied by means of a model employing the capillary rise of a liquid in contact with a stripwise heterogeneous surface.

TL;DR: The detailed electrophoretic mobility behavior for Si02 in aqueous solutions of Co(II), La(III), and Th(IV) has been determined as a function of metal ion concentration, pH, ionic strength, and percentage solids.

TL;DR: In this article, it was shown that when a viscoelastic mixture of molten polymers is extruded, composites are produced as a result of the formation of two distinct modes of dispersion: stratification or droplet-fiber formation.

TL;DR: In this article, it was shown that the optimum stability of O/W emulsions stabilized by 1:1 molar ratios of Spans and Tweens is due to association between the emulsifier molecules adsorbed at the oil-water interface.

TL;DR: In this article, it was shown that drop burst depends more upon the rate of increase of the velocity gradient G up to the critical value GB at burst than upon the drop/medium viscosity ratio λ.

TL;DR: In this article, a method has been developed for calculating on a chemical element-by-element basis the contribution of various sources to the aerosol of a polluted atmosphere, and four major sources have been considered and their relative contributions estimated by employing certain trace elements characteristic of each source; sodium, aluminum, lead and vanadium were utilized for sea salt, soil, automobile emissions, and fuel oil fly ash, respectively.

TL;DR: In this paper, the wave properties of longitudinal surface waves with a frequency of the order of 1 Hz were measured on acidified solutions of decanoic acid and wave properties showed a good agreement with the expected behavior of longitudinal waves and the results could be used to calculate surface dilational parameters.

TL;DR: In this article, the authors explored the nature of certain special classes of solutions to the equation of coagulation for the case of Knudsen aerosols and showed that self-preserving solutions may exist.

TL;DR: In this paper, a detailed consideration of the filling and emptying of a single uniform cylindrical capillary pore is presented, and the metastable states causing adsorption hysteresis in such a pore are identified.

TL;DR: In this article, the adsorption isotherms of Bovine Serum Albumin at some solid/water interfaces have been measured and the role of interfacial coagulation and slow desorption has been discussed in relation to the reversibility of adsorptions.

TL;DR: In this article, the dispersion force contributions to the surface free energies of octane and water are equal and a simple method is developed to characterize the hydrophilic nature of solid surfaces.

TL;DR: In this article, a new theory was proposed which considers molecular repulsions and thus properly predicts the minimal nature of the interaction functions and the influence of elastic flattening on the interaction force and energy.

TL;DR: In this paper, it was shown that the coagulation and repeptization of electrocratic colloids can be treated in one theory provided that the appropriate boundary conditions are chosen.

TL;DR: In this paper, the points of zero charge (pzc) of alumina and magnetite suspensions have been determined between 25 and 90°C by measuring the distribution of the potential-determining ions (H +, OH − ) at the oxide-solution interface as a function of p H.

TL;DR: In this article, the correction factors for the drop weight, or drop volume, technique for the determination of surface and interfacial tensions by Harkins and Brown have been expanded from the range 0.72080 ≥ψ(r/V13) ≥ 0.5352 to include the range of 0.9439 ≥ ψ( r/V 13) ≥0.720 80.

TL;DR: In this paper, a systematic experimental study has been made of the interfacial tension γ of paraffin-water interfaces on which polyvinyl alcohol (PVA) was adsorbed.

TL;DR: In this article, a comprehensive account of the electrical double-layer interaction forces between spheres with the condition of either constant surface potential or constant surface charge density is given, and simple formulas involving quadratures are derived for the plate interaction free energy at both constant potential and constant charge, and the difference formula of Frens is generalized.

TL;DR: A general theory of orientable particles developed in a prior pair of papers for axially symmetric particles is extended to particles of arbitrary shape in this article, and applications of the general theory to the sedimentation of Brownian particles in gravitational and ultracentrifugal fields are presented.

TL;DR: In this article, an experimental investigation of the temperature coefficient of the surface tension of pure water was carried out by the equilibrium ring method, and the method, apparatus, and procedure are described in detail.

TL;DR: In this paper, the authors calculate the specific absorbance of a carbon black by Mie theory from the refractive index of carbon black and the size of the independent structural units, which are treated as solid spheres containing the same volume of carbon.

TL;DR: The Los Angeles Smog Project as mentioned in this paper was a collaborative research effort involving investigators from the University of Minnesota, California Institute of Technology, California State Department of Health, University of Washington, and the California Statewide Air Pollution Research Center.

TL;DR: In this article, the authors report the development of a new technique for analyzing a mixture of different charged macromolecules, which combines light scattering and electrophoresis to permit the simultaneous determination of the electrophoretic mobilities and diffusion coefficients of the charged molecules in solution.

TL;DR: A theoretical expression was derived for the weight average micellar molecular weight and free energy change of micellization of a multicomponent surfactant mixture and good agreement was found between theoretical and experimental values of M and ΔG0 for mixtures of alkyltrimethylammonium bromides which contained up to seven quaternaries.

TL;DR: In this paper, the theory of sessile lenses was developed, and the role of line tension was examined in the role that would be played by a line tension if active, providing useful limiting approximations.

TL;DR: In this article, the electrokinetic response of fluorite, as a function of pH, is shown to be due to a surface carbonation reaction of the type: CaF 2( surf ) + CO 3  → CaCO 3( surf ), +2 F ǫ.

TL;DR: In this paper, a second-order partial differential equation is derived which expresses the steady-state distribution of dipole orientations in terms of the angle between the directions of the external field and the fluid vorticity vector, external field strength, and the rotary diffusivity, each of which is rendered dimensionless with the shear rate.

TL;DR: In this paper, the utilization of adsorption isotherms of mixtures of two completely miscible nonelectrolyte liquids for estimating surface areas of adsorbents is discussed.