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Showing papers in "Colloids and Surfaces A: Physicochemical and Engineering Aspects in 1995"


Journal ArticleDOI
TL;DR: In this article, the association properties of poly(ethylene oxide)-block-poly(propyleneoxide)-blockpoly(methylene oxide) (PEO) copolymers in aqueous solutions, and the adsorption at interfaces are reviewed.

1,730 citations


Journal ArticleDOI
TL;DR: In this paper, a review of equilibrium and dynamic aspects of surface tension and adsorption, primarily of single nonmicellar or premiceller surfactants at the air/water interface, is presented.

675 citations


Journal ArticleDOI
TL;DR: In this paper, a review is given on a recent theory of electrophoresis of spherical “soft” particles, i.e., polyelectrolyte-coated spherical colloidal particles.

257 citations


Journal ArticleDOI
TL;DR: In this article, the link between surface chemistry, including surface group acid-base dissociation and counterion complexation, and tip sample interaction in aqueous electrolyte solution is examined.

232 citations


Journal ArticleDOI
TL;DR: In this article, the rate constants for the kinetics of the particulate coagulation process were determined and the results showed that the electrocoagulation rate follows a second order relationship, accounting for the electrophoretic movement of the particles toward the anode.

199 citations


Journal ArticleDOI
TL;DR: In this article, the surface modification reaction of silica gel with aminoorganosilanes proceeds in two steps, for both the reaction step and the curing step, the chemical and physical interactions of the silane molecules with the silica surface have been modelled.

183 citations


Journal ArticleDOI
TL;DR: In this article, a series of illustrations is used to indicate the power of acid-base concepts in effecting this rationalization, and suggest the need to take into account acidbase interactions if polymer systems are to be formulated, so as to satisfy steadily increasing demands on their performance and durability.

180 citations


Journal ArticleDOI
TL;DR: In this paper, a new surfactant type that mimics the additive effect is tested, which has a poly-propylene oxide chain inserted in between the conventional alkyl and ether sulfate groups.

177 citations


Journal ArticleDOI
TL;DR: The cloud point-concentration curve of Triton X-114 (TX114) aqueous solutions has been measured and a lower consolute temperature of 11°C at about 0.03 wt.% is obtained as mentioned in this paper.

167 citations


Journal ArticleDOI
TL;DR: In this paper, Fourier transform infrared (FT-IR) spectroscopy has been used to reveal the structure and reactivity of black carbon (in the form of n -hexane soot).

165 citations


Journal ArticleDOI
H. Barthel1
TL;DR: In this paper, the authors show that silylation of the silica surface by dimethylsiloxy groups results in greater thickness than silylations by trimethylsilox groups.

Journal ArticleDOI
TL;DR: In this paper, it was found that the presence of micelles had only a small but systematic effect upon the rate of Ostwald ripening, contrary to expectation, where micells might be expected to aid the process of ripening through solubilization of oil.

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the influence of electrolyte and surfactant on the aggregation behavior of three Poloxamers (F127, F88 and P123) by differential scanning calorimetry (DSC) and T jump measurements.

MonographDOI
TL;DR: The Inner Sphere Surface Complex: A Key to Understanding Surface Reactivity Symposium as mentioned in this paper was organized in honor of Werner Stumm, the founder of aquatic chemistry and a total of 21 invited papers and 30 posters were presented at this special symposium.

Journal ArticleDOI
TL;DR: In this paper, the mechanism of adsorption of wheat starch and its components (amylopectin and amylose) onto hematite has been investigated using diffuse reflectance infrared Fourier transform spectroscopy.

Journal ArticleDOI
TL;DR: In this paper, a liquid membrane (MEM) method for separation of chromium(VI) from simulated waste water has been described, and the effect of the variation of the oil-membrane constituents and different types of chemical reactions at the II/I interface using aqueous solutions of various strippants (internal phase) has been studied for a critical appraisal of the efficiency of the process.

Journal ArticleDOI
TL;DR: The effect of pH (2-10) and humic acid (HA) concentration on the adsorption of HA onto a range of pure-phase inorganic colloids (δ-alumina, haematite, manganese dioxide, amorphous silica and titanium dioxide) has been studied, and the influence of HA on the colloidal zetapotential has been investigated as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this paper, a novel technique is described for measuring rheological properties of a water/oil/water film, using samples of an actual crude oil emulsion and brine.

Journal ArticleDOI
TL;DR: In this paper, the authors considered the features of concentration polarization caused by an electric current passing through a unipolar conductive particle and analyzed the dependences of electroosmosis of the second kind on the tangential drift of the induced space charge, water dissociation, electrolyte concentration and heat processes.

Journal ArticleDOI
TL;DR: In this article, the electrophoretic mobilities of asphaltenes were measured in an aqueous medium and an attempt was made to measure their electrokinetic properties in non-aqueous solvents.

Journal ArticleDOI
TL;DR: In this article, the first detailed study of molecular ozone adsorption by means of FT-IR spectroscopy at low temperatures (77 K) was reported, where the spectra of 16O3, 18O3 and mixed isotopic modifications adsorbed on silica and titania were observed.

Journal ArticleDOI
TL;DR: In this paper, the aggregation of asphaltenes using molecular modelling techniques was studied using the solubility parameter of two different average molecules and their aggregates, and the results showed a decrease in this parameter with increase of the aggregation state, in agreement with experimental evidence.

Journal ArticleDOI
TL;DR: In this article, the authors have studied the whole solution phase in the system tetraethyl orthosilicate-ethanol-aqueous ammonia and have mapped the region for monodisperse particles.

Journal ArticleDOI
TL;DR: In this article, the interaction energy of the adsorbed particles and the equilibrium ratio of the clay concentration at the oil droplet surface to that in the bulk water were strong functions of the contact angle.

Journal ArticleDOI
TL;DR: In this article, the presence of a hairy layer at the surface of polystyrene latex was investigated by comparing size, mobility, critical coagulation concentration, and surface charge density measurements for three different surfactant-free latexes before and after heat treatment.

Journal ArticleDOI
TL;DR: In this article, the effects of molecular weight and concentration of polyacrylic acid (PAA) on the yield stress τy of ZrO2 suspensions were evaluated, and the Mw range studied was from 1656 to 750000.

Journal ArticleDOI
TL;DR: In this article, the surface tension in the system methane/water has been measured with the pendent drop method (rising bubble mode) at 25°C for pressures between 0.5 and 46.8 MPa.

Journal ArticleDOI
TL;DR: In this article, the colloidal properties of surfactant-free nanospheres prepared from biodegradable polyesters have been investigated and the results reveal a significant difference in colloidal behaviour of the nanosphere systems, depending on the composition of the copolymer used in their preparation.

Journal ArticleDOI
TL;DR: In this article, a surface equation of state approach was used to evaluate the cross-sectional area of the homologous series of sodium n-alkyl sulphates (from C7 to C14).

Journal ArticleDOI
TL;DR: In this article, the decay behavior of short-life foam is defined as the equilibrium state of the classical Bikerman's experiment, i.e., when the foam formation by bubbling (at bottom of the column) exactly compensates the foam collapse (at the top), and it is found that short life foam decay exhibits a linear variation in the foam column height with the logarithm of the elapsed time.