Surface Pressure Isotherm for a Monolayer of Charged Colloidal Particles at a Water/Nonpolar-Fluid Interface: Experiment and Theoretical Model

Langmuir ◽  
2014 ◽  
Vol 30 (10) ◽  
pp. 2768-2778 ◽  
Author(s):  
Plamen V. Petkov ◽  
Krassimir D. Danov ◽  
Peter A. Kralchevsky
Keyword(s):  
Theoretical Model ◽  
Surface Pressure ◽  
Colloidal Particles ◽  
Fluid Interface

Patchy colloidal particles at the fluid–fluid interface

Soft Matter ◽  
2018 ◽  
Vol 14 (46) ◽  
pp. 9457-9465 ◽  
Author(s):  
Chung Chi Chio ◽  
Ying-Lung Steve Tse
Keyword(s):  
Colloidal Particles ◽  
Particle Density ◽  
Fluid Interface ◽  
Depletion Force

Imbalance of solvent particle density leads to depletion force.

scholarly journals Directional freezing of binary colloidal suspensions: a model for size fractionation of graphene oxide

Soft Matter ◽  
2019 ◽  
Vol 15 (2) ◽  
pp. 243-251 ◽  
Author(s):  
Xin Xu ◽  
Luofu Liu ◽  
Hongya Geng ◽  
Jianjun Wang ◽  
Jiajia Zhou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Theoretical Model ◽  
Colloidal Particles ◽  
Colloidal Suspensions ◽  
Size Fractionation ◽  
Preferential Adsorption ◽  
Directional Freezing ◽  
Ice Phase

A theoretical model of a binary colloid suspension was developed by incorporating both the moving freezing boundary and the preferential adsorption of colloidal particles to the ice phase.

scholarly journals Wave Propagation Across Solid-Fluid Interface With Fluid-Structure Interaction

2015 ◽  
Author(s):  
Tomohisa Kojima ◽  
Kazuaki Inaba ◽  
Kosuke Takahashi
Keyword(s):  
Wave Propagation ◽  
Theoretical Model ◽  
Characteristic Impedance ◽  
Fluid Structure Interaction ◽  
Fluid Interface ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Mechanism Of Wave Propagation ◽  
Free Falling ◽  
The Impact

This paper reports on investigations conducted with a view towards developing a theoretical model for wave propagation across solid-fluid interfaces with fluid-structure interaction. Although many studies have been conducted, the mechanism of wave propagation close to the solid-fluid interface remains unclear. Consequently, our aim is to clarify the mechanism of wave propagation across the solid-fluid interface with fluid-structure interaction and develop a theoretical model to explain this phenomenon. In experiments conducted to develop the theory, a free-falling steel projectile is used to impact the top of a solid buffer placed immediately above the surface of water within a polycarbonate tube. The stress waves created as a result of the impact of the projectile propagated through the buffer and reached the interface of the buffer and water (fluid) in the tube. Two different buffers (polycarbonate and aluminum) were used to examine the interaction effects. The results of the experiments indicated that the amplitude of the interface pressure increased in accordance with the characteristic impedance of the solid medium. This cannot be explained by the classical theory of wave reflection and transmission. Thus, it is clear that on the solid-fluid interface with fluid-structure interaction, classical theories alone cannot precisely predict the generated pressure.

scholarly journals Curvature dynamics and long-range effects on fluid–fluid interfaces with colloids

Soft Matter ◽  
2019 ◽  
Vol 15 (13) ◽  
pp. 2848-2862 ◽  
Author(s):  
A. Tiribocchi ◽  
F. Bonaccorso ◽  
M. Lauricella ◽  
S. Melchionna ◽  
A. Montessori ◽  
...  
Keyword(s):  
Long Range ◽  
Colloidal Particles ◽  
Fluid Interfaces ◽  
Fluid Interface ◽  
Fluid Mixture ◽  
Binary Fluid ◽  
Interface Curvature

The fluid–fluid interface curvature can provide new insights into local inhomogeneities of a binary fluid mixture containing colloidal particles.

Capillary meniscus interaction between colloidal particles attached to a liquid—fluid interface

1992 ◽  
Vol 151 (1) ◽  
pp. 79-94 ◽  
Author(s):  
P.A Kralchevsky ◽  
V.N Paunov ◽  
I.B Ivanov ◽  
K Nagayama
Keyword(s):  
Colloidal Particles ◽  
Fluid Interface

Comment on “Curvature capillary migration of microspheres” by N. Sharifi-Mood, I. B. Liu and K. J. Stebe, Soft Matter, 2015, 11, 6768

Soft Matter ◽  
2016 ◽  
Vol 12 (2) ◽  
pp. 328-330 ◽  
Author(s):  
P. Galatola
Keyword(s):  
Soft Matter ◽  
Colloidal Particles ◽  
Fluid Interface

Spherical colloidal particles floating at a fluid interface shaped as a uniform saddle, with equilibrium wetting conditions at the Young angle.

scholarly journals Soft electrostatic repulsion in particle monolayers at liquid interfaces: surface pressure and effect of aggregation

2016 ◽  
Vol 374 (2072) ◽  
pp. 20150130 ◽  
Author(s):  
Peter A. Kralchevsky ◽  
Krassimir D. Danov ◽  
Plamen V. Petkov
Keyword(s):  
Theoretical Model ◽  
Surface Pressure ◽  
Charged Particles ◽  
Interparticle Distance ◽  
Electrostatic Repulsion ◽  
Water Interface ◽  
Liquid Interfaces ◽  
Polar Fluid ◽  
Air Water Interface ◽  
Oil Water

Non-densely packed interfacial monolayers from charged micrometre-sized colloid particles find applications for producing micropatterned surfaces. The soft electrostatic repulsion between the particles in a monolayer on an air/water (or oil/water) interface is mediated by the non-polar fluid, where Debye screening is absent and the distances between the particles are considerably greater than their diameters. Surface pressure versus area isotherms were measured at the air/water interface. The experiments show that asymptotically the surface pressure is inversely proportional to the third power of the interparticle distance. A theoretical model is developed that predicts not only the aforementioned asymptotic law but also the whole surface pressure versus area dependence. An increase in the surface pressure upon aggregation of charged particles in the interfacial monolayers is experimentally established. This effect is explained by the developed theoretical model, which predicts that the surface pressure should linearly increase with the square root of the particle mean aggregation number. The effect of added electrolyte on the aggregation is also investigated. The data lead to the conclusion that ‘limited aggregation’ exists in the monolayers of charged particles. In brief, the stronger electrostatic repulsion between the bigger aggregates leads to a higher barrier to their coalescence that, in turn, prevents any further aggregation, i.e. negative feedback is present. This article is part of the themed issue ‘Soft interfacial materials: from fundamentals to formulation’.

Investigation of the Codeposition of Polymer Lattices With Copper on a Rotating Disk Electrode

1996 ◽  
Vol 451 ◽  
Author(s):  
J. Fransaer ◽  
J. P. Celis
Keyword(s):  
Theoretical Model ◽  
Colloidal Particles ◽  
Composite Coatings ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Plating Bath ◽  
Fluid Flow Velocity ◽  
Mean Size ◽  
Pmma Particles

ABSTRACTThis article involves the study of the electrodeposition of composite coatings that form when colloidal particles deposit onto an electrode at which metal electrodeposition simultaneously occurs. The codeposition process of polystyrene (PS) and polymethylmethacrylate (PMMA) particles from a copper plating bath on a rotating disk electrode (rde) was investigated both theoretically and experimentally. The influence of the fluid flow velocity, density, mean size and zeta-potential of the particles, viscosity and temperature of the plating bath on the deposition rate of particles is studied using the theoretical model. The predictions of the model are compared with experimental results.

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