Interfacial Phenomena

“…The mechanism of the emulsion is, however, still difference can be explained by error in the interfacial tension value used for the estimation or by a driving flow much under dispute. Davies and Rideal [64] explained spontaneous emulsification based on three mechanisms: interfacial turbugreater than the critical value for the instability.…”

Section: Table II Condition Of Estimation For Kelvin-helmholtzmentioning

confidence: 99%

“…Under this condition, it would be easy to form low-wavelength interfacial in the water in the form of fine emulsion droplets. According to Davies and Rideal, [64] the mechanism of negative interfaperturbations.…”

Section: Table II Condition Of Estimation For Kelvin-helmholtzmentioning

confidence: 99%

Dynamic and equilibrium interfacial phenomena in liquid steel-slag systems

Chung

Cramb

2000

Metall Mater Trans B

145

103

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The equilibrium interfacial energy between a liquid iron alloy and a liquid slag is a key physical parameter in the design of steel-refining processes as high interfacial energies are desired to avoid emulsification of slag in steel and the creation of casting defects. During a chemical reaction between a liquid iron alloy droplet and a liquid slag, it is possible to observe by X-ray photography a number of dynamic interfacial phenomena such as droplet flattening, interfacial turbulence, and spontaneous emulsification that can potentially lead to serious processing problems. These dynamic phenomena have been studied during reactions between Fe-Al and Fe-Ti alloys and silica-containing slags, and the presence of significant interfacial disturbance has been observed during the times of high reaction rate between the slag and the metal. It is suggested that interfacial chemical reactions induce Marangoni and natural convection at the slag-metal interface. This interfacial flow gives rise to interfacial waves due to a Kelvin-Helmholtz instability. The waves grow, become unstable, and lead to spontaneous emulsification of slag in steel and steel in slag. Experiments using industrial samples and controlled laboratory tests have indicated that this phenomenon may be more common than once thought and could lead to some serious problems in the processing of steel alloys containing high quantities of aluminum and/or titanium.

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“…The properties of the capillary column play a central role in CE separations. Nonmodified fusedsilica columns expose silanols, deprotonated for pH values higher than pH 2.3 and thus generating an electroosmotic flow (EOF), when the voltage is applied [5,6]. While protein separations require EOF suppression, in order to achieve wall neutrality and to limit adsorption phenomena, successful separations of small molecules and peptides have been demonstrated for EOF-driven conditions [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Repartition effect of aromatic polyaniline coatings on the separation of bioactive peptides in capillary electrophoresis

et al. 2002

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The capillary walls of fused-silica capillary electrophoresis (CE) columns were modified with a thin film of polyaniline (PANI), providing open-tubular columns with a stable coating containing aromatic groups and amine functionalities. Fast and efficient separations were observed for small bioactive peptides under acidic conditions on PANI-coated columns. The mechanism of separation is based on hydrophobic interactions between the analytes and the polymeric matrix. Good reproducibility was observed from run-to-run. Due to the simple derivatization procedure, method flexibility, the uniformity of the coating and its stability, conjugated polymers could find practical application in capillary zone electrophoresis (CZE) separations.

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Interfacial Phenomena

Abstract: not Available.

Cited by 101 publications

References 0 publications

Monolayers of lipids at the water–air interface

Monolayers of lipids at the water–air interface

Dynamic and equilibrium interfacial phenomena in liquid steel-slag systems

Repartition effect of aromatic polyaniline coatings on the separation of bioactive peptides in capillary electrophoresis

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