Showing papers in "Journal of Colloid and Interface Science in 2002"

TL;DR: The nature of the spacer group (length, flexibility, chemical structure) has been shown to be of the utmost importance in determining the solution properties of aqueous dimeric surfactants.

TL;DR: The pK(a) values of stearic, elaidic, oleic, linoleic, and linolenic acids were studied and compared to values of area per molecule in a spread monolayer of these acids and it was found that as area per molecules increases the intermolecular distance increases and pK (a) decreases due to reduced cooperation between adjacent carboxyl groups.

TL;DR: The error function method provided the best parameters for the isotherm equations in this system and is demonstrated for error comparison purposes.

TL;DR: Cerium oxide (CeO(2) nanoparticles were prepared sonochemically, by using cerium nitrate and azodicarbonamide as starting materials, and ethylenediamine or tetraalkylammonium hydroxide as additives to have a strong effect on the particle size and particle size distribution.

TL;DR: In this paper, surface tension measurements have long been used in the study of interaction between water soluble polymers and surfactants, and a brief discussion of the use of three of them, namely electron spin resonance, photon correlation spectroscopy, and atomic force microscopy, is given.

TL;DR: It was demonstrated that a more acidic environment promotes the formation of sulfur oxides and sulfuric acid despite yielding small H(2)S removal capacities, and study of carbon regeneration using water washing and heat treatment showed that the adsorbents can be regenerated to about 40% of their initial capacity.

TL;DR: The zeta potentials and yield stresses of silica suspensions were measured over a wide range of monovalent electrolyte concentrations and an attractive ion-ion correlation force is presumed responsible for the additional attraction necessary to explain the observed results.

TL;DR: The column performance is carried out to assess the applicability of the ion exchange fiber for the removal of fluoride, phosphate, and arsenate ions from synthetic wastewaters with satisfactory removal efficiency.

TL;DR: The improved drop penetration model was much more successful at estimating the drop penetration time on all powders and the predicted times were generally within an order of magnitude of the experimental results.

TL;DR: In this article, the synthesis of nanosized superparamagnetic hematite particles by dissolving ferric salts in hydrochloric acid and heating at 100°C is described.

TL;DR: It was found that glycinin (pH 3) can form an interfacial gel in a very short time, whereas beta-casein has very poor network-forming properties.

TL;DR: This work considers that the contact angle between the liquid meniscus and the inner surface of the capillary becomes a dynamic contact angle when the liquid front is in movement and suggests an analytical approach of the classical Lucas-Washburn equation (LWE).

TL;DR: The threshold radius is often assumed to be a dominant pore radius, yet in this study the entrapped mercury content shows no evidence for the presence of a dominantpore radius.

TL;DR: The mole fractions of hydroxo complexes of titanium(IV) ion in an aqueous solution with 0.10 mol dm(-3) NaClO4 at 25 degrees C have been determined as a function of pH by a newly developed analytical procedure based on UV spectrophotometry.

TL;DR: The velocity-dependence of the dynamic contact angle is studied experimentally for a series of water-glycerol solutions having viscosities ranging from 1.5 to 672 mPa s to analyse the dominant microscopic mechanism by which the interface formation occurs.

TL;DR: It was found that the model recently proposed by Rabinovich et al. closely predicts the pull-off forces for glass and lactose particles and the adhesion of the peptide material and polystyrene particle to polypropylene is underestimated by about an order of magnitude with the theoretical model, in which the interacting substrates are treated as rigid materials.

TL;DR: An understanding of metal and proton reactivity on bacterial cell surfaces can be addressed quantitatively through the use of electrostatic and chemical equilibrium modeling techniques proposed in this study.

TL;DR: Interparticle interactions affecting the stability of sludge flocs taken from laboratory-scale sequencing batch reactors at different solids retention times (SRTs) were investigated in batch experiments by varying the pH, ionic strength, cation valence, and urea and ethylenediaminetetraacetate concentrations of suspending solutions.

TL;DR: A system of two differential equations is derived to describe the evolution with time of radii of both the drop base and the wetted region inside the porous layer, which predicts that the dynamic contact angle dependence on the same dimensionless time as before should be a universal function.

TL;DR: It is demonstrated that zeta potential distribution measurement could be a powerful tool to study slime coating phenomena in a complex colloidal system.

TL;DR: The liquid spreading was found to follow r(t)=a(b+t)(n) behavior, and the effect of particle size on infiltration time was used to predict the point at which spreading ceases due to infiltration for various particle sizes.

TL;DR: In this paper, surface diffusivities have been observed to range between 10−16 and 10−10 cm2 s−1 for metals including Sr, Cd, Zn, and Ni.

TL;DR: The exact laws deduced from energetic considerations are found to be in excellent agreement with the data and it is shown how such tubes can be used to prevent bubbles from being trapped.

TL;DR: Fractal dimensions estimated by the light-scattering and free-settling techniques differ significantly and support the hypothesis that naturally occurring aggregates possess a multilevel structure.

TL;DR: The pH value in the gel-sol system for the preparation of uniform anatase TiO2 nanoparticles, as a decisive factor for controlling the size and shape of the final product, was found to be significantly changed during the formation process of the anataseTiO2 particles from a condensed Ti(OH)4 gel.

TL;DR: In this article, the surface wettability and hydrophilicity of terminally grafted PVP and PVAc on smooth silicon wafers were investigated by advancing and receding contact angle measurements.

TL;DR: It appears that the effect of coverslip pressure on multiple emulsions may be useful as an accelerated stability testing method or for initial formulation screening.

TL;DR: In this paper, the authors used coupling time-resolved synchrotron X-ray diffraction (XRDT) at both small and wide angles and high-sensitivity differential scanning calorimetry (DSC) at cooling rates of -3 and -1 degrees C/min from 60 to -10 degrees C and compared to that of the anhydrous milk fat.

TL;DR: The microwave treatment would be useful for the carbonization of organic wastes to save energy and indicate that the adsorption of dyes depended upon the surface polar groups on the carbonaceous materials.

TL;DR: The synthesis of ionic magnetic fluid in the presence of tartrate ions is described, and nanoparticles in a large range of size are obtained: the mean diameter varies from 3 to 10 nm.