Showing papers in "Journal of Colloid and Interface Science in 1969"

TL;DR: In this paper, a charge transfer interaction was proposed to explain the observed adsorption and spectroscopic characteristics on the basis of the electron densities in the sorbate molecule, as well as the types and concentrations of surface functional groups present on the carbon.

TL;DR: The first t-curves for water vapor were presented in this article, where the thickness of the adsorbed film at a given relative pressure depends on the heat of adsorption.

TL;DR: In this paper, the stability of colloidal silica sols (Ludox HS and Ludox AM) in the presence of various concentrations of NaCl, LiCl, KCl, CsCl, NaBr, NaI, CaCl2, and Ca(NO3)2 has been studied as a function of pH.

TL;DR: In this article, an investigation of the contact angle θ and the zeta potential at the interface between aqueous solutions and vitreous silica which had been methylated by reaction with trimethylchlorosilane was made.

TL;DR: In this article, a theory of the capillary rise between two closely spaced cylinders has been extended to systems of three and four equidistant cylinders as a function of the distance of separation and the contact angle.

TL;DR: Bile salts behave as nonionic detergents with dyes of opposite charge and allow the first break point in a plot of the λ-max shift vs. log concentration of bile salt to be taken as an estimate of the CMC, showing that the micelles are highly charged and bind little or no counterions in water.

TL;DR: The shape of an equilibrium fluid interface that extends far outward from a circular line of contact is calculated and tabulated as a function of radius of the contact circle, interface inclination or contact angle there, interfacial tension, density difference across the interface, and force of gravity as discussed by the authors.

TL;DR: In this article, a modified version of the two-parameter BET equation is derived, employing a third parameter k, which is a measure of the attractive force field of the adsorbent.

TL;DR: In this article, the surface tension of poly(isobutylenes) in the molecular weight range 400-3000 was determined at 24°C and a simple free-volume argument seems to be consistent with this empirical observation.

TL;DR: In this article, the authors measured the contact angles of water, glycerol, formamide, ethylene glycol, 1-bromonaphthalene, and bromobenzene on surfaces of polyethylene, polystyrene, polyacetal, polycarbonate, poly(ethylene terephthalate), and poly(tetrafluoroethylene-co-hexafluoropropylene).

TL;DR: In this paper, a new method of solving the linear Debye-Huckel (D.H.) equation for the electric potential in the overlapping diffuse layers of two identical, spherical, colloidal particles at separation R is described.

TL;DR: An investigation has been carried out of the phase equilibria in the three-component system cetyltrimethylammonium bromide-hexanol-water with homogeneous solution phases and two homogeneous mesomorphous phases with different internal structure.

TL;DR: In this article, it is shown how the adsorption laws with respect to time can be deduced from other assumptions (mobile layer, adsorbed molecules with interactions) widely described in studies of the adorption equilibrium.

TL;DR: In this article, the size distributions and particle concentrations were obtained in situ using light scattering techniques, and the particle sizes and particle densities were obtained by using a light scattering technique on the chromium hydroxide sol sol of submicronic particles.

TL;DR: Four examples of specific lipid-protein interaction are described as they are revealed by monolayer techniques, consistent with variations in the relative orientation of lipid and protein, in a model in which a mosaic structure is prevailing with lipid packages surrounded by protein.

TL;DR: In this article, the state of solution of Aerosol OT (di-2-ethylhexyl sodium sulfosuccinate) was investigated in various nonaqueous solvents with the use of ultracentrifugation, light scattering, and viscometric techniques.

TL;DR: In this article, phase equilibria have been studied at 20°C in the systems potassium caprylate-decanol-water, potassium caprate-octanol, and potassium olcatedecanol, water.

TL;DR: In this article, the nucleation rate of droplets from water vapor in a helium atmosphere was measured with an expansion cloud chamber as a function of temperature, supersaturation, and sensitive time.

TL;DR: In this article, the authors measured the interfacial tension along the boundary formed between two immiscible polymer liquids by the pendant drop method and calculated the separate contributions to the surface tension by dispersion and dipole interaction forces, in accordance with the procedure proposed by Fowkes.

TL;DR: In this article, the optic sign of the lamellar liquid crystalline solution phase (G ) in the Aerosol OT, water system is dependent on both temperature and concentration and is also markedly affected by the presence of solubilized additives.

TL;DR: An examination of the electron micrographs of four native asphalties, a vanadium-enriched asphaltene, an asphalte from a visbreaker tar, a resin, and a gilsonite, has revealed in all cases irregular polyhedral shaped particles of average diameter 20-30A, suggesting that the associated aliphatic and naphthenic portions of the molecule must be closely bound to the aromatic nucleus as mentioned in this paper.

TL;DR: In this article, contact angles of a variety of hydrophobic liquids were measured on clean surfaces of borosilicate glass, quartz, and sapphire at 20°C with the RH at 0.6% and 95%.

TL;DR: Physical adsorption studies of simple nonpolar hydrocarbon vapors on ice are described in this article, where the isotherms obtained cover a temperature range from −96°C to −30°C, or up to roughly the temperature where drastic sintering occurs.

TL;DR: In this paper, the fundamental Smoluchowski flocculation rate equations including the effects of polydispersity and particle-particle potentiM energy barrier have been solved for any initial particle size distribution.

TL;DR: In this article, the surface charge densities of cassiterite and rutile have been determined as a function of pH 3 and ionic strength in KNO 3 and KCl solutions while the oxide surfaces were in primary equilibrium with the potential-determining ions (H + and OH − ).

TL;DR: The results obtained from equilibrium experiments with acetic and butyric acids, phenol, and substituted phenols in aqueous, toluene, and hexane solutions show that the new polar polymeric sorbents have a considerable adsorption capacity in non-aqueous solvents as mentioned in this paper.

TL;DR: In this paper, the steady-state viscosities of microemulsions were determined in a capillary viscometer, and the relative viscosity (nrel) data conformed to Nrel = exp a (δ−δ s ) 1−k(δ − Δ s) where k is a hydrodynamic interaction coefficient which depends empirically on mean particle size according to k = 1.079 + exp ( 0.01008 D m ) + exp( 0.00290 D m 2 ).

TL;DR: In this article, the interaction between SDS and polyvinyl acetate derivatives has been studied in terms of the solubilization of Yellow-OB, viscosity, and dialysis equilibrium.