Showing papers in "Journal of Colloid and Interface Science in 1993"

TL;DR: In this paper, the minimum free-energy formulation applicable to any contact angle is proven for liquid bridges between two spherical rigid bodies of equal radii under conditions where the effects of gravity are negligible, and this formulation is a more fundamental criterion for specifying the stable numerical solutions of the Laplace-Young equation.

TL;DR: The results suggest that the effect of the water wettability of surfaces on cell adhesion in the presence of serum should occur through protein layers adsorbed directly to the substrate surfaces.

TL;DR: In this paper, stable aqueous colloidal dispersions of cross-linked poly(N-isopropylacrylamide), polyNIPAM, were prepared by aqueously dispersion copolymerization of NIPAM with methylenebisacryamide, BA, in the presence of sodium dodecyl sulfate, SDS.

TL;DR: In this article, force measurements between silica surfaces in aqueous solutions of NaCl are reported, and the force at short range is dominated by a strong repulsion which is attributed to hydration of the surface.

TL;DR: In this article, a formal analogy between the theory of dewetting of a solid surface covered by a fluid film and spinodal decomposition is established, and it is shown that the later stage of de wetting (nucleation and growth of dry regions) can be described within the framework of the existing mathematical model of film rupture, if one uses the accurate derivation of the disjoining pressure in the range of low film thickness.

TL;DR: In this article, a uniform spindle-type particles of iron coated with silica were obtained by reduction of precursor hematite cores covered with the silica shell in hydrogen atmosphere at elevated temperatures.

TL;DR: The formation mechanism of the monodisperse pseudocubic hematite particles obtained in large quantities by aging a highly condensed ferric hydroxide gel at 100°C has been studied in this paper.

TL;DR: In this article, a procedure for calculating the energy and force of capillary interaction between two floating spherical particles of submillimeter size attached to a liquid-fluid interface is proposed on the basis of a general expression for the grand thermodynamic potential of the system.

TL;DR: In this article, the authors used an extended DLVO theory to estimate the hydration energy of Wako precipitated silica and showed that it decreases with increasing NaCl concentration, suggesting that it is an inherent property of silica.

TL;DR: In this paper, the pseudocubic and platelet-type particles were obtained by a method provisionally referred to as the gel-sol method through aging highly condensed Fe(OH)3, while the spindle-type particle was obtained in a diluted homogeneous solution of ferric chloride in the presence of phosphate ions.

TL;DR: In this paper, the growth of three different hematite particle morphologies was investigated: cubes, spheres, and double ellipsoids, and it was shown that the morphology of the particles depends on the concentration of FeCl 3, pH, and the temperature of aging.

TL;DR: In this paper, a well defined white pigment (whitener) was prepared by coating monodispersed silica particles with titania and the hiding power of this powder was evaluated as a function of the particle diameter, the thickness of the titania shell, and the calcination temperature.

TL;DR: In this article, the surface tension of glycerol, ethylene glycol, formamide, α-bromonaphthalene, and benzene, as well as of the interfacial tension of polar liquid-apolar liquid, were made.

TL;DR: In this article, a nonlinear, dynamic equation for the film thickness was proposed to account for the stability and dynamics of thin films, and it was shown that films thicker than a certain critical thickness show true breakup, whereas thinner films may merely undergo a morphological phase separation.

TL;DR: In this paper, a growing drop technique is described for measuring dynamic interfacial tension due to sorption of surfaceactive solutes, which is useful for measuring both liquid/gas and liquid/liquid tensions over a wide range of time scales.

TL;DR: The linearized Poisson-Boltzmann theory is used to calculate the electrical double layer interaction free energy between two parallel charged plates for the case in which charge regulation due to the dissociation of surface groups may be modelled by the linearized regulation model that specifies a linear relationship between the surface charge and the surface potential as mentioned in this paper.

TL;DR: In this article, a broad distribution of relaxation times for porous sandstone and carbonate rocks are explicitly taken into account, and the broad distributions of relaxation time that characterize these materials are explicitly considered.

TL;DR: In this article, the average diameters of oil-in-water emulsion droplets were determined by quasi-elastic light scattering and a technique of enzymatic breakdown of the adsorbed protein layer together with light scattering was employed to study the thickness of the adhesives.

TL;DR: In this article, the authors measured the force as a function of separation between two mica surfaces immersed in lithium nitrate aqueous solutions over wide concentration and pH ranges and analyzed the exponentially decaying parts of force profiles, yielding information about the Ψ d potentials.

TL;DR: In this article, contact angles of diiodomethane, bromoform, water, formamide, and glycerol were measured on cholesterol surfaces both bare and precontacted with bile salts.

TL;DR: In this article, the electrophoretic mobility of latex particles covered with temperature-sensitive poly (N-isopropylacrylamide) hydrogel layers has been measured and analyzed via a mobility formula for soft particles.

TL;DR: In this paper, the morphological change of lecithin vesicles during solubilization with the cationic surfactant cetyltrimethylammonium chloride (CTAC) was studied by means of cryo-transmission electron microscopy (cryo-TEM).

TL;DR: In this article, the particle pair interaction potential function was used to evaluate the dispersion stability of monodisperse aqueous latices, with and without steric stabilizers, using photon correlation spectroscopy.

TL;DR: In this paper, double-chain surfactants with two carboxylate groups were prepared from diepoxy compounds and their surface-active properties in alkaline aqueous solutions were measured and the results were compared with the data of similar types of double-chains with two other ionic head groups.

TL;DR: In this article, the interaction and synergism at 25°C of some alkyl and dialkyldiphenylether mono-and disulfonates with a second surfactant (a nonionic, a betaine, or an amine oxide) in aqueous solution containing swamping amounts of NaCl were studied by calculating interaction (β) parameters from surface tension-concentration data.

TL;DR: In this paper, the James-Healy model for adsorption of hydrolyzed species, with the use of a single adjustable parameter, ΔGchem, for each cation, correctly predicted both the direction and magnitude of the temperature dependence of the pH range for adaption, but failed to account for its concentration dependence.

TL;DR: In this paper, an accurate, nonintrusive method was described to measure the dynamic tension of dilated liquid-liquid interfaces, where the time-dependent pressure difference across the curved interface of an expanding spherical drop, immersed in the second immiscible phase was measured as a function of time.

TL;DR: A comparison of literature methods for the calculation of the mesopore size distribution (PSD) is made on the basis of nitrogen adsorption isotherms of aluminum hydroxide, aluminum oxide, and silica gel characterized by well defined H1, H2, H3, and H4 hysteresis loops.

TL;DR: In this paper, the ultrasonic velocity as a function of time (at 6.0°C) was used to monitor the kinetics of crystallization of oil droplets in n -hexadecane-in-water emulsions containing a mixture of solid and liquid droplets.

TL;DR: In this paper, the dynamic wetting and dewetting of polyethylene terephthalate (PET) by polar liquids (water and glycerol) has been studied.