Showing papers in "Advances in Colloid and Interface Science in 1998"

TL;DR: It is found that solvent properties of water within the interphase separating a solid surface from bulk water solution vary with contacting surface chemistry, and this interphase can extend tens of nanometers from a water-contacting surface due to a propagation of differences in self association between vicinal water and bulk-phase water.

TL;DR: In this paper, the authors reviewed the effect of Lifshitz, Slezov and Wagner theory on the stochastic properties of single component disperse phase emulsions, and found that the interfacial tension below the CMC of the surfactant stabilizes the emulsion, but show only a weak dependence upon the concentration of micelles above the cMC, and that the effects of the addition of a less soluble component to the disperse phase significantly retards the rate of ripening.

TL;DR: In this paper, the structural characteristics of micro-emulsions and their dynamic and transport behaviors have been presented in detail and underlying principles of the methodologies used for the above understanding have been concisely documented and discussed.

TL;DR: In this article, the authors discuss the need to develop concerted efforts towards expanding the interpretation of mercury porosimetry data by examining the virtues and flaws of various reported attempts to generate particle size distributions, inter-and intraparticle porosities, pore tortuosities and pore ratios from mercury intrusion and/or extrusion curves.

TL;DR: In this article, it is shown that supercritical gases show adsorption isotherms which are fundamentally different from those in the IUPAC classification, which is based conceptually on ideas about the ''absolute'' adsorsion rather than on the Gibbs adsorsions.

TL;DR: In this article, the pore size distributions from nitrogen and argon adsorption isotherms are calculated using the non-local density functional theory (NLDFT) model.

TL;DR: There have been several approaches to the molecular modelling of metal ion binding based on the representation of humic molecules as colloidal particles with an associated electrical double layer as mentioned in this paper, and various theoretical models have been described and the relative merits of the approaches compared.

TL;DR: In this paper, the authors used the Brunauer-Emmett-Teller (BET) theory for the determination of surface area of porous solids, which is based on an over-simplified model of multilayer adsorption.

TL;DR: In this article, a dual-mode (dissolution-hole-filling) sorbent has been proposed for organic matter fraction of soils, which has an internal nanopore structure that provides specific sorption sites for organic compounds, regardless of their polarity.

TL;DR: In this article, a simple and convenient evaluation of volume of micropores and heterogeneity of the micropore size distribution can be obtained by combining the results from adsorption of N2 at 77 K and CO2 at 273 K.

TL;DR: In this paper, a Gaussian random field is used to describe the topology of disordered porous networks, which is suitable for studying gas kinetics, molecular dynamics or adsorption process within the representative elementary volume.

TL;DR: In this paper, a review of the most commonly used techniques for binary gas adsorption data is presented, and a complete error analysis for a typical system is shown, with consideration to error analysis showing that most data available in literature cannot be used to scrutinize between models.

TL;DR: In this paper, an integrated characterization of porous carbons with different approaches such as the high resolution α s -method for N 2 adsorption, X-ray diffraction, and magnetic susceptibility measurement is shown.

TL;DR: A review of some of the work that has been performed to understand the effect of surface roughness and a non-uniform surface charge density on colloidal forces can be found in this paper.

TL;DR: In this article, the authors discuss the importance of chain length compatibility on interfacial properties and related technologies from a practical and fundamental viewpoint, such as surface tension, surface viscosity, micellar stability, foamability, lubrication, contact angle, bubble size, environmental remediation, corrosion, enhanced oil recovery, microemulsion water solubilization and micro-emulsion stability.

TL;DR: A general classification of most common renal calculi (calcium oxalate, phosphate and uric acid stones) based on their formation mechanism is presented in this article, where the main etiological factors that enable their development are discussed.

TL;DR: The structural ordering in colloidal dispersions is found to be very similar to that of atomic systems, such as crystalline solids, atomic liquids and even glasses as mentioned in this paper, and a number of intrinsic as well as extrinsic parameters influence the stability of colloids and induce transitions between different phases.

TL;DR: In this paper, the energy barrier U max between the approaching particles determines whether a particle collision can result in effective aggregation or not, while the adhesive strength J of aggregated particles determined whether the formed aggregates are disrupted by the surface erosion in the viscous subrange of turbulence or by the fragmentation in the inertial sub range of turbulence.

TL;DR: In this paper, the authors developed a 2D network mercury intrusion-retraction simulator that is adapted to the specific geometrical and topological characteristics of model pore networks and analyzed the mercury meniscus motion in chambers and throats during intrusion and the mercury disconnection events during retraction at pore-scale.

TL;DR: In this paper, the van der Waals interaction energies of colloidal particles on an air-water interface have been determined based on the DLVO theory, after incorporating the effects of the solvation zone around particles and of the airwater interfacial region.

TL;DR: The article reviews the fundamental factors in the application of aqueous solubilized systems evaluating the influence by different amphiphilic association structures on the vapor pressure of fragrance compounds to reveal that the vapor Pressure versus time variation is improved compared to solvent-based formulations.

TL;DR: In this article, the thermodynamic properties of simple gases in straight-walled cylindrical micropores are discussed and various models used for the gas atom/pore wall interaction energy are presented.

TL;DR: In this paper, the structure of the electrical double layer (EDL) of colloidal systems is discussed and the methods of determination of the most important parameters of the EDL, i.e., the value of the surface-potential ψ 0, the Sternpotential Έ δ and the electrokineticpotential, the surface charge density σ 0, as well as the specific surface conductance κ σ and Rel parameter are described.

TL;DR: In this article, the pore size distribution in aerogels is analyzed using the isotherm of the adsorption in the presence of a large volume of nitrogen condensation.

TL;DR: In this article, a semi-empirical potential energy model for microporous solids is presented, which includes damped two-body dispersion interactions, three-body interactions, induced interactions (often negligibly small) and long-range electrostatic interactions.

TL;DR: In this article, the morpho-fluctuation terms in the governing transport equations are analyzed along with effective coefficient dependencies, boundary conditions and porous media experiment analysis are discussed, and a few well-developed closure expressions for the VAT-based transport equations in porous media are discussed.

TL;DR: In this article, the authors developed a theoretical investigation of the different forces exerted on a solid particle and make comparisons with recent observations, i.e., the hydrodynamic force which favours capture, and the van der Waals forces which may induce rejection.

TL;DR: An overview of recent developments in Small Angle X-ray Scattering beamlines allows experimenters to utilise new sample environments and use simultaneous several experimental techniques on one sample.

TL;DR: In this paper, the application of small angle neutron scattering (SANS) is reviewed with particular emphasis on two recent developments: contrast variation methods to investigate adsorption mechanisms and the examination of oriented anisotropic porous microstructures, as can occur in microporous carbon fibres.

TL;DR: The various difficulties in the whole problem are considered in succession: the coextrusion of the films where a contaminant transfer already occurs; and the effect of the liquid food which may enhance the diffusion of the contaminant.