scholarly journals Lateral capillary interactions between colloids beneath an oil–water interface that are driven by out-of-plane electrostatic double-layer interactions

Soft Matter ◽  
2015 ◽  
Vol 11 (44) ◽  
pp. 8701-8706 ◽  
Author(s):  
Bum Jun Park ◽  
Mina Lee ◽  
Bomsock Lee ◽  
Eric M. Furst
Keyword(s):  
Double Layer ◽  
Charged Particles ◽  
Colloidal Crystals ◽  
Disjoining Pressure ◽  
Water Interface ◽  
Two Dimensional ◽  
Electrostatic Double Layer ◽  
Out Of Plane ◽  
Capillary Interactions ◽  
Oil Water

The electrostatic disjoining pressure between charged particles and a charged oil–water interface generates lateral capillary attractions between adjacent particles beneath the interface, which consequently lead to closely packed, two-dimensional colloidal crystals.

scholarly journals Anomalous Long-Range Attraction in Colloidal Binary Mixtures at Fluid–Fluid Interfaces

2020 ◽  
Vol 4 (3) ◽  
pp. 36
Author(s):  
Zonglin Yi ◽  
To Ngai
Keyword(s):  
Long Range ◽  
Colloidal Particles ◽  
Experimental Result ◽  
Colloidal System ◽  
Fluid Interfaces ◽  
Water Interface ◽  
Two Dimensional ◽  
Colloidal Systems ◽  
Oil Water ◽  
Theoretical Side

The properties of binary colloidal systems have gained the interest of researchers because they have much richer structures than their one-component counterpart. Continuing efforts are being made on the theoretical side on binary colloidal systems, while many issues remained unsolved for the lack of solid experimental supports, especially for study in the field of two-dimensional (2D) binary colloids system. Oil–water interfaces can serve as a good stringent 2D confinement for colloidal particles and can avoid anomalous problems caused by the quasi-two-dimensional environment in previous experimental reports. In this work, we conduct experimental research of binary colloids system in an oil–water interface to revisit theoretical predication. We measure an ultra-long-range attraction and discuss the possible mechanism of this attraction by comparing the experimental result with existing model and theory. This study could contribute more understanding of the binary colloidal system in both experimental aspects and theoretical aspects.

Investigation on Flow Characteristics of Deposited Water Displaced by Flowing Oil in Hilly Terrain Tube

2012 ◽  
Vol 516-517 ◽  
pp. 926-930
Author(s):  
Guang Li Xu
Keyword(s):  
Numerical Simulation ◽  
Test Section ◽  
Flow Characteristics ◽  
Geometrical Model ◽  
Water Interface ◽  
Two Dimensional ◽  
Hilly Terrain ◽  
Vof Model ◽  
Test Loop ◽  
Oil Water

The flow characteristics of deposited water displaced by flowing oil in hilly terrain tube were studied experimentally and numerically. Lab-scale experiments were carried out on the transparent organic glass test loop with I.D. 50 mm to investigate the distributions of oil-water interface by diesel flowing from a lower horizontal test section into the up-inclined test section. Two-dimensional numerical simulation was conducted by VOF model and CSF model based on the test geometrical model. Comparisons of the oil-water interface distribution and the critical superficial oil velocity show that the numerical simulations favorably compare with the measurements.

Pairwise interactions of colloids in two-dimensional geometric confinement

Soft Matter ◽  
2014 ◽  
Vol 10 (48) ◽  
pp. 9675-9680 ◽  
Author(s):  
Bum Jun Park ◽  
Bomsock Lee ◽  
Taekyung Yu
Keyword(s):  
Water Interface ◽  
Particle Interactions ◽  
Two Dimensional ◽  
Pairwise Interactions ◽  
Geometric Confinement ◽  
Oil Water

Particle interactions confined to two-dimensional colloidal cages at the oil–water interface are highly pairwise.

Measurement of Long-Range Repulsive Forces between Charged Particles at an Oil-Water Interface

2002 ◽  
Vol 88 (24) ◽  
Author(s):  
R. Aveyard ◽  
B. P. Binks ◽  
J. H. Clint ◽  
P. D. I. Fletcher ◽  
T. S. Horozov ◽  
...  
Keyword(s):  
Long Range ◽  
Charged Particles ◽  
Water Interface ◽  
Oil Water ◽  
Repulsive Forces
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