Showing papers in "Journal of Colloid and Interface Science in 1998"

TL;DR: It is believed that it is possible to control the composite particle size and morphology by a convenient choice of the composition of the system, and this new polymer-encapsulation process could be used to synthesize other organic-inorganic composite particles, using, for example, other monomers or minerals.

TL;DR: It was observed that the cells were adhered, spread, and grown more onto the positions with moderate hydrophilicity of the wettability gradient surface than onto the more hydrophobic or hydrophilic positions.

TL;DR: Super water- and oil-repellent surfaces have been made utilizing the fractal structure of the solid surfaces, showing a contact angle of 160 degrees for water droplets.

TL;DR: The effect of interfacial chain density of poly(ethylene glycol) (PEG) on the adsorption of serum proteins was investigated by situellipsometry and the importance of the protein size in protein rejection by PEG coatings was discussed.

TL;DR: Particles with liquid cores and solid shells have been prepared by the controlled phase separation of poly(methylmethacrylate) (PMMA) within the droplets of an oil-in-water emulsion, finding that core/shell microcapsules were formed when hexadecane or decane was used as non-solvent and only when polymeric emulsifiers were employed.

TL;DR: Attachment of the bacteria appears to be predominated by transport from the bulk phase to the substratum, and was greatest on the downstream edges of the grooves.

TL;DR: In this article, a method for simulation of the time-dependent three-dimensional motion of liquid droplets on solid substrates for systems exhibiting finite equilibrium contact angles is introduced, where the contact angle is a prescribed function of position on the substrate.

TL;DR: Investigation of interfacial properties of lipophilic nonionic surfactants of the sorbitan fatty acid ester type with the aim of selecting appropriate emulsifiers for water-in-oil (W/O) emulsions under different conditions found that interfacial rheology data were predictive of emulsion stability for the systems studied.

TL;DR: In this paper, an improved method for the calculation of proton affinities of individual surface groups of metal (hydr)oxides has been developed for a refinement of the multi site complexation (MUSIC) model.

TL;DR: In this article, general purpose adsorption isotherm equations were fitted to the sorption data of lead and cadmium on both unmodified and Ca-saturated kaolinite and montmorillonite.

TL;DR: Surface characteristics of magnetite at 25degreesC in aqueous suspensions are systematically studied and the measured specific surface area and concentration of proton binding sites correspond well to the calculated values.

TL;DR: The Freundlich isotherm equation, in the form of theta = KP1/n, was derived by treating the model with the ensemble theory in statistical mechanics as a theoretical tool, the model being set up for the adsorption system with emphasis on two factors, namely the lateral interaction between the Adsorbed molecules and the energetic surface heterogeneity.

TL;DR: It is demonstrated that the implementation of a 3D cross-correlation scheme is a powerful method in suppressing multiple scattering contributions in light scattering experiments and opens a wide field of characterization of colloidal dispersions with high turbidity without having to resort to high dilution.

TL;DR: A model of the 2:1 type clay water interface is proposed to fit proton adsorption and electrophoretic data of the studied sample and those previously published for an illite, and predicts that the affinity of surface sites for cations is higher in illites than in montmorillonites.

TL;DR: The kinetics of calcite dissolution in the presence of calcium chelating agents was investigated over the pH range of 3.3-12 using a rotating disk apparatus and the surface complexation mechanism was shown to describe the rate of dissolution.

TL;DR: Attempts to understand the properties of mixed micelles (composition, mutual synergism, component activity coefficients, and CMC) have been made with the help of the propositions of Clint, Rubingh, andRubingh and Holland.

TL;DR: In this paper, the authors made available lipoheptapeptide compounds with modified structures and different hydrophobicities which promise to have potential for biotechnological and pharmaceutical applications.

TL;DR: The authors solve for stability constants describing metal adsorption onto distinct functional groups on the bacterial cell walls and find that these stability constants vary substantially but systematically between the two bacterial species at the two different ionic strengths.

TL;DR: Pressure relaxation experiments indicated that the particle cake layer is reversible, implying no irreversible deposition of silica colloids onto the zirconia membrane surface, consistent with the increased importance of double layer repulsive forces in controlling the cake layer structure as the solution ionic strength and particle size decrease.

TL;DR: In this article, the dynamic behavior of functional groups on polymer surfaces was studied with regard to the effects of aging media on the work of adhesion and the surface free energy of the polymeric solid.

TL;DR: The adsorption of 3-glycidoxypropyltrimethoxysilane onto silica colloids suspended in an isopropanol/water solution was studied and related to the microstructure and properties of coatings prepared from the suspensions.

TL;DR: A systematic difference between contact angles measured with particles and on planar surfaces was observed, and detachment forces were slightly higher than predicted from flotation theory.

TL;DR: The great success, in the past decade, of on-line multiangle light scattering (MALS) detection combined with size exclusion chromatography for the measurement of polymer mass and size distributions suggested that a similar attack for particle characterization might prove useful as well.

TL;DR: The process efficiency was found to be 80-90% at room temperature and can be extended to the treatment of industrial effluents containing phosphates like that from phosphatic fertilizer plants.

TL;DR: The dye adsorption characteristics of sludge particulates, both primary and secondary, were studied and it was found that the increase in the ionic strength decreases the dye adsorbate density.

TL;DR: In this article, a stirred hydrogen electrode concentration cell was used to conduct potentiometric titrations of rutile suspensions from 25 to 250°C in NaCl and tetramethylammonium chloride media.

TL;DR: It is shown that there can be phase transitions in the adsorbed phase which lead to hysteresis in kinetically controlled experiments and this simple molecular model is able to predict the change in the interface geometry without invoking the Kelvin equation or the macroscopic concept of surface tension.

TL;DR: In this article, the authors quantitatively understand the cooperative adsorption of these proteins on hydroxyapatite, the degree of cooperativity, and how to control the adaption process.

TL;DR: It was found that the drop size dependence of contact angles was due to a positive line tension, of the order of 1 µJ/m with a trend toward larger values for higher liquid surface tensions.