Showing papers in "Journal of Colloid and Interface Science in 1977"

TL;DR: In this article, it is shown that surface roughness can greatly reduce the adhesion between soft elastic solids and shows the importance of combining concepts of surface forces (or surface energies) with the principles of contact mechanics.

TL;DR: In this paper, a theoretical analysis of the evaporation rate and residual mass of a drop on a surface is presented for contact angles ranging from near zero up to 180°.

TL;DR: In this paper, the Gibbs inequality condition for the equilibrium of a drop bound by an edge has been confirmed experimentally using a circular sapphire disk with a 90° edge and, to a lesser degree, using aluminum disks with edges subtending a range of angles.

TL;DR: In this article, the effect of a constraining circular cylindrical boundary on the translational Brownian motion of an isolated spherical particle suspended in a Poiseuille flow is investigated.

TL;DR: In this paper, it was pointed out that the duration of a Brownian collision is long enough to allow redistribution of the double layer and of the conformation of adsorbed macromolecules, but too short for adaptation of the surface charge or of the adsorption of macromoles.

TL;DR: In this article, the thermophoresis of aerosol particles in the laminar compressible boundary layer on a flat plate is considered theoretically, and the particles are attracted by a plate colder than the gas and the dust concentration drops monotonically as the wall is approached; in the absence of Brownian diffusion a nonzero concentration at the wall was found.

TL;DR: In this paper, the Schofield-van Olphen model of particle interactions has been used to elucidate the conditions under which edge-face, edge-edge, and face-face coagulated structures exist.

TL;DR: The Nanopar analyzer as mentioned in this paper uses single submicron diameter pores made by the Nuclepore (etched particle track) process to measure the electroosmotic velocities of fluids in pores, the dimensions of pores and particles, and particle concentrations.

TL;DR: In this article, a procedure for preparation of titanium dioxide sols consisting of spherical particles of narrow size distributions is described, which involves aging at elevated temperatures highly acidic solutions of TiCl 4 which also contain Na 2 SO 4.

TL;DR: The surface chemistry constitutes a major part of science which has ubiquitous consequences in chemical processes, in engineering and technology, in biology and medicine, and, indeed, in the very existence of life as discussed by the authors.

TL;DR: In this paper, a method for measuring the dispersive part of the surface free energy γsD of a high-energy solid, and its interaction energy with water and n-alkanes, WSL, has been developed.

TL;DR: In this paper, the dependence of contact angles on velocity was shown to be related to surface heterogeneity, and the plate-based method was used to measure contact angles as a function of the three-phase boundary velocity.

TL;DR: In this article, an extension of the nonionic polymer adsorption theory to polyelectrolyte adaption is presented. But the results of the analysis are limited to low potentials (Debye-Huckel approximation).

TL;DR: In this article, a ternary phase diagram for a micro-emulsion with hexadecyltrimethylammonium perchlorate was presented, showing that hexane, water, and 2-propanol can stabilize a microemulsified solution.

TL;DR: In this article, a method of determining the polar term of the adhesion energy of several liquids to a high-energy solid, I SL P, was developed, based on the measurement of the contact angle of water on a solid in a liquid medium.

TL;DR: In this article, the Laplace equation of capillarity for systems with circular menisci was solved using a numerical technique and the results were used to complete the force analysis and to formulate the free energy analysis.

TL;DR: Polymer filled with synthetic hydroxyapatite covered with the irreversibly adsorbed NPG-GMA has a tensile strength about 50% greater than that of the polymer filled with untreated apatite.

TL;DR: In this article, a polystyrene latice with a variety of surface functional groups, for example, −COOH and −NH2, which ionize to form charged sites, was used for experimental study of heterocoagulation.

TL;DR: In this paper, an equation for the rate of capillary rise in porous media with nonuniform pores was derived on the basis of a three-dimensional network model of pore structure, consisting of a repeating capillary element with step changes in its diameter.

TL;DR: In this paper, experiments to test hydrodynamic interaction theories of a pair of spheres of equal size in a viscous liquid were made in simple shear and excellent agreement with theory was found for the trajectories of the spheres which could be characterized by two measurable parameters for permanent and separating doublets colliding both equatorially and nonequatorially.

TL;DR: In this article, a systematic study with silver iodide, involving double-layer measurements, stability studies, and electrokinetics, leads to the conclusion that the electrokinetic potential ζ and the outer Helmholtz plane potential ψ d coincide within experimental error.

TL;DR: The balance of the forces of interaction between colloidal particles determines, in general, whether a colloidal dispersion remains stable or undergoes coagulation or flocculation as discussed by the authors, and it is then shown how such forces can be measured experimentally using either macroscopic systems or particulate dispersions.

TL;DR: In this article, a general method of calculating forces, torques, and translational and rotational velocities of rigid, neutral, equal-sized spheres in a viscous fluid undergoing uniform shear flows is presented.

TL;DR: In this article, the authors derived the equations for steady-state nucleation from the rates of growth and decay of clusters with emphasis on a clear distinction between thermodynamic quantities and inherently kinetic quantities, and showed that the emission rates of molecules from embryos can be related to the equilibrium size distribution of clusters in a saturated vapor.

TL;DR: In this article, a comparison of the data with the available theories shows that the best agreement is obtained with the theory of Fuchs and Bricard, whereas the agreement with White is less satisfactory.

TL;DR: The effectiveness of various alkyl benzene sulfonates in reducing hydrocarbon-water interfacial tensions to very low values is examined in this paper, where isomers with the benzene ring attached to different positions on the alkyal chain are studied.

TL;DR: In this article, the adsorption isotherms and adsorbate layer thicknesses of about 20 different, dilute, polymeric systems were determined and with very few exceptions, all were found to form monolayers, which in the majority, consisted of individual macromolecules.