Showing papers in "Journal of Colloid and Interface Science in 1987"

TL;DR: In this article, a numerical approach to the solution of an aerosol dynamics system is presented, which is accurate, extremely economical, applicable to any combination of aerosol processes, and does not require prior knowledge of the particle-size distribution function.

TL;DR: In this article, the effect of applied electric field on pendant and flowing drops (through a capillary) was studied by observing the droplet profile as a function of applied voltage, and the critical voltage, φ c, at which transition from the pulsating mode to the stable jet mode occurred.

TL;DR: In this paper, the effects of various parameters (pH, temperature, nature of anions, aging time) on the properties of the resulting precipitates were studied systematically and an apparatus designed for continuous production of such sols was described.

TL;DR: In this paper, a surface energy gradient along silicon or glass plates, 20 mm long, has been developed for the analysis of the surface energy dependence of the adsorption of human fibrinogen, γ-globulin, and lysozyme on the solid surfaces.

TL;DR: In this article, the properties of the homogeneous microemulsions are measured along a path through the phase prism at constant amphiphile concentration but varying oil/water ratio, and the dynamics of the microstructure is studied by viscosity, dynamic light scattering, and electric field and pressure jump relaxation.

TL;DR: In this paper, pyrene and dinaphthylpropane (DNP) fluorescence probes were used to investigate the structure of the adsorbed layer of sodium dodecyl sulfate at the alumina-water interface.

TL;DR: In this paper, contact angles, work of adhesion, and interfacial tensions at a dissolving hydrocarbon surface were investigated using contact angles and contact angles of dissolving surfaces.

TL;DR: In this article, an improved model for the breakup of an isolated floc in a shear flow is developed, similar in concept to previous versions but generalized to consider a spatial variation of the internal volume fraction of the form ϕ ∝ rD−3.

TL;DR: In this article, the formation of three different crystalline calcium phosphates (DCPD, OCP, HAP) and an amorphous calcium phosphate was studied as a function of pH and supersaturation.

TL;DR: In this paper, a novel technique is presented for the determination of interfacial tension by analysis of axisymmetric fluid drop profiles, which couples recent developments in digital image acquisition and processing with modern methods for robust shape comparison.

TL;DR: In this paper, a model was developed to account for this behavior by treating the membrane as a square array of intersecting cylindrical fibers, and experimental data for air-liquid systems in polytetrafluoroethylene membranes showed good agreement with the model.

TL;DR: In this paper, the authors investigated how the molecular structure of various components of microemulsions and salinity influence two interfacial parameters of the system, namely the spontaneous curvature and elasticity of interfacial films.

TL;DR: In this article, the relationship between the moments of the log normal particle size distribution and the moments determined by a dynamic light-scattering measurement is developed for the case when the particles are small and spherical.

TL;DR: In this paper, stable, aqueous dispersions of polypyrrole latex particles were prepared by a dispersion polymerization technique using ferric chloride as the initiator and partially hydrolyzed poly(vinyl acetate) as the stabilizer.

TL;DR: In this article, the authors have shown that the spontaneous curvature of an interface is determined by the geometric packing of surfactant and cosurfactant molecules at the interface, whereas the interfacial elasticity is related to the energy required to bend the interface.

TL;DR: In this paper, the effect of inorganic phosphate on calcite crystallization was examined using a free-drift seeded growth method at 25°C and the kinetic data were interpreted using a mechanistic model and also a parabolic rate law.

TL;DR: In this article, a study has been made of Ostwald ripening in unstabilized oil/water (o/w) emulsions of 1,2-dichloroethane, benzene, nitrobenzene, toluene, andp-xylene, stabilized by SDS.

TL;DR: In this paper, a criterion for judging the quality of surfactant solutions with regard to surface chemical contaminations is suggested, which is based on the determination of the surface tension (shift) of a surface tension dependent upon the relative content of impurity.

TL;DR: In this paper, the kinetics of crystal growth of calcite seed crystals were investigated at pH 8.50, 25°C, in stable calcium carbonate supersaturated solutions, and it was found that phosphate adsorbs on calcite and the Langmuir equation gave a satisfactory fit of the data at ionic strength 0.1 mole dm−3.

TL;DR: A cationic surfactant, cetyltrimethylammonium bromide (CTAB), when added to an aromatic substance such as benzoic, salicylic, or phthalic acid or their alkaline metal salt, induces a remarkable viscoelasticity in solution even in very diluted states as discussed by the authors.

TL;DR: In this article, a nonnegatively constrained least squares (NNLS) algorithm was used to extract the desired pore volume distribution from experimental spin-lattice relaxation measurements of fluids contained in porous solids.

TL;DR: In this paper, a two-dimensional theory for the viscosity of foams and concentrated emulsions is presented, which considers viscous dissipation in the thin films between the bubbles as the system is subjected to a periodic uniaxial strain that does not exceed the elastic limit.

TL;DR: In this article, the pyrene fluorescence lifetime τ 0 and the ratio I 1I 3 of the first and third bands of pyrene monomer fluorescence spectrum appear to indicate that only one type of mixed micelle exists in the mixed systems LiDS, C12E6LiFOS, and C 12E8.

TL;DR: In this article, the adsorption of α-lactalbumin and β -lactoglobulin on a hydrophilic chromium surface was followed in situ, using ellipsometry.

TL;DR: In this article, a thermodynamic theory of micro-emulsions containing brine, oil, an ionic surfactant, and a nonionic cosurfactant is given.

TL;DR: In this article, secondary structure changes of bovine serum albumin were examined in solutions of sodium decyl sulfate (SDeS), sodium dodecyl sulfates (SDS), decyltrimethylammonium bromide (DeTAB), dodecynthimethylmoniam bromides (DTAB) and hexadecyltrimylmonium Bromide(HTAB); the relative proportions of α-helix, β-structure, and random coil were estimated by simulating a mixed circular dichroism

TL;DR: In this paper, the authors examined the initial adsorption, desorption and exchange kinetics of the protein bovine serum albumin (BSA) on six polymer surfaces with widely varying surface properties and functionalities.

TL;DR: In this article, the dependence of the shear modulus on the volume fraction φ was measured for volume-filling networks formed by Brownian flocculation of aqueous polystyrene latices.

TL;DR: In this paper, the effect of pH of the permeating fluid on the release of clay particles naturally present in sandstones is studied, and the results are interpreted in terms of the double-layer theory of colloid stability.

TL;DR: In this article, a method for a quantitative determination of surfactant adsorption on the muscovite mica basal plane by means of ESCA was reported, and the known three-dimensional chemical structure of mica, especially the number of exchangeable ions on the molecularly smooth surface, was utilized as an internal standard.