Showing papers in "Journal of Colloid and Interface Science in 1981"

TL;DR: In this paper, the strength of binding between a given metal and the surface may vary by an order of magnitude or more from one site to another, suggesting that the surface is composed of many groups of binding sites.

TL;DR: In this article, a simple and remarkably successful method of analysis of the charging mechanism at the mica surface suggests a novel approach to the determination of the hydrated radius of adsorbed cations.

TL;DR: In this paper, van Helden and Vrij described the preparation of organophilic silica dispersions using a combination of two earlier described processes: first uniform silica particles were prepared by hydrolysis of ethylorthosilicate according to the method of W. Stober A. Iler's method (U.S. Patent 2,801,185).

TL;DR: In this paper, the effect of primary, linear alcohols (ethanol to hexanol) on the micellar properties (CMC, micelle ionization degree β and molecular weight M w composition of the mixed alcohol + surfactant micelles) of solutions of alkyltrimethylammonium bromides (octyl to hexadecyl) has been investigated, with particular emphasis on the system pentanol-tetradecyltrimethyllammoniam bromide (TTAB).

TL;DR: In this article, a multicomponent isotherm is derived based on the assumption that an exponential distribution of adsorption energies exists for each component in a k-component system.

TL;DR: In this article, a series of experiments designed to test the validity of the Kelvin equation by direct measurement of the mean radius of curvature of the surface of cyclohexane condensed between crossed mica cylinders was conducted.

TL;DR: In this paper, the authors investigated the breakdown pathways associated with three different W/O/W systems using cinemicrography and found that all the proposed mechanisms of breakdown occur in all three types, but that some are more favored than others, their predominance depending on the type of multiple emulsion formed.

TL;DR: In this paper, competitive adsorption of Cd, Cu, Pb, and Zn onto amorphous iron oxyhydroxide (Fe 2 O 3 · H 2 O (am)) was studied in systems containing pairs of metal adsorbates.

TL;DR: Results of intrinsic viscosity measurements of rabbit IgG solutions as a function of pH seem to support the proposed configuration changes of the IgG molecule as a result of ionization-induced conformational changes.

TL;DR: In this paper, the surface tension of mixed solutions of cationic and anionic surfactants has been studied quantitatively for the system sodium dodecyl sulfate and trimethyl ammonium bromide.

TL;DR: In this paper, the surface tension of the aqueous solution of dodecylammonium chloride (DAC) has been measured as a function of temperature and concentration by applying the thermodynamic relations, the entropy of surface formation Δs and the surface density of DAC Γ 1 H have been calculated.

TL;DR: In this article, a theoretical analysis of particle deposition kinetics onto walls of parallel-plate and cylindrical channels is presented, by solving the transport equations numerically, the dimensionless mass transfer Sherwood number is determined as a function of various dimensionless parameters introduced such as Pe, Gr, Ad, and Dl.

TL;DR: In this paper, a two-body collision analysis has been developed both with and without the presence of external forces, showing that homocoagulation is always favored over heterocagulation.

TL;DR: In this paper, the authors considered conditions under which diffusiophoresis and thermophoreis of solid colloidal particles could be considered driven by the gradient with opposite sign of the corresponding solid interfacial tension.

TL;DR: In this article, the free energy change associated with micelle formation, ΔFm, was calculated from the temperature dependence of the CMC, and the ΔHm and ΔSm values were estimated from the slopes and the intercepts, respectively, of the log CMC versus the reciprocal of temperature plots.

TL;DR: In this article, it was shown that very low levels of surfactant not only displace adsorbed soluble polymer from the latex particle surface, but simultaneously reduce the concentration of soluble polymer required to effect flocculation.

TL;DR: In this article, a phase diagram of a mixture of cholesterol with dimyristoyl phosphatidic acid (DMPA) and diphmitoyl-phatidylcholine (DPPC) is presented.

TL;DR: In this paper, the effect of 1-propanol, 1-butanol, and 1-pentanol on the micellar properties of aqueous solutions of tetradecyltrimethylammonium bromide (TTAB) at an ionic strength 0.1 M KBr, has been investigated by means of elastic and quasielastic light scattering.

TL;DR: In this paper, the quadrupole of the adsorbate molecule and the electrostatic field in the zeolite cavity was considered and a new method of generalizing the adsorption equation was established.

TL;DR: Water-containing inverted micelles of sodium di(2-ethylhexyl) sulfosuccinate (AOT) have been investigated by fluorescence polarization using fluorescent hydrophilic probes localized in the aqueous core of the micellers.

TL;DR: In this paper, a radiation-induced graft copolymerization technique using various mixtures of 2-hydroxyethyl methacrylate (HEMA) and EHEMA was used as graft substrates, and the critical surface tension of each polymeric surface in air was estimated by the Zisman method.

TL;DR: In this article, the destabilizing effect of Ostwald ripening has been considered in relation to O/W hexane emulsions stabilized by sodium dodecyl sulfate, and the addition of a third component to the oil phase gives rise to stability provided it has a lower vapor pressure than the oil itself.

TL;DR: In this paper, the effect of an imposed pressure gradient between the two reservoirs, acting in the same direction as the concentration gradient, is examined to establish the domains of osmosis and reverse ossosis, and the influence of unequal diffusion coefficients for anions and cations (diffusional potential) on the osmotically driven flows is studied.

TL;DR: In this paper, an approximate solution for the case of a spherical particle with low ε potential immersed in a symmetric electrolyte is presented for determining the effective conductivity of a dilute suspension of spheres, correct to 0(ε 2 ).

TL;DR: In this paper, the pore space is treated as a lattice of voids interconnected by necks in a three-dimensional network, and it is shown that the shapes of the desorption isotherm and the penetration curve depend on the coordination number of the lattice and the size and shape of individual network units as well as on the distribution of neck sizes and the shape of the necks.

TL;DR: In this article, the stability of a plane interface with a linear temperature (concentration) gradient and finite thickness of the both fluid layers is investigated by means of linear hydrodynamical stability theory.