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.

Equilibrium clustering of colloidal particles at an oil/water interface due to competing long-range interactions

2020 ◽  
Vol 571 ◽  
pp. 232-238
Author(s):  
David Pérez-Juárez ◽  
Rodrigo Sánchez ◽  
Pedro Díaz-Leyva ◽  
Anna Kozina
Keyword(s):  
Long Range ◽  
Colloidal Particles ◽  
Water Interface ◽  
Long Range Interactions ◽  
Oil Water

scholarly journals Preparation of Pickering emulsions through interfacial adsorption by soft cyclodextrin nanogels

2015 ◽  
Vol 11 ◽  
pp. 2355-2364 ◽  
Author(s):  
Shintaro Kawano ◽  
Toshiyuki Kida ◽  
Mitsuru Akashi ◽  
Hirofumi Sato ◽  
Motohiro Shizuma ◽  
...  
Keyword(s):  
Colloidal Particles ◽  
Adsorption Property ◽  
Building Blocks ◽  
Pickering Emulsion ◽  
Surface Active Property ◽  
Water Interface ◽  
Pickering Emulsions ◽  
Surface Active ◽  
Oil Water ◽  
Interfacial Adsorption

Background: Emulsions stabilized by colloidal particles are known as Pickering emulsions. To date, soft microgel particles as well as inorganic and organic particles have been utilized as Pickering emulsifiers. Although cyclodextrin (CD) works as an attractive emulsion stabilizer through the formation of a CD–oil complex at the oil–water interface, a high concentration of CD is normally required. Our research focuses on an effective Pickering emulsifier based on a soft colloidal CD polymer (CD nanogel) with a unique surface-active property. Results: CD nanogels were prepared by crosslinking heptakis(2,6-di-O-methyl)-β-cyclodextrin with phenyl diisocyanate and subsequent immersion of the resulting polymer in water. A dynamic light scattering study shows that primary CD nanogels with 30–50 nm diameter assemble into larger CD nanogels with 120 nm diameter by an increase in the concentration of CD nanogel from 0.01 to 0.1 wt %. The CD nanogel has a surface-active property at the air–water interface, which reduces the surface tension of water. The CD nanogel works as an effective Pickering emulsion stabilizer even at a low concentration (0.1 wt %), forming stable oil-in-water emulsions through interfacial adsorption by the CD nanogels. Conclusion: Soft CD nanogel particles adsorb at the oil–water interface with an effective coverage by forming a strong interconnected network and form a stable Pickering emulsion. The adsorption property of CD nanogels on the droplet surface has great potential to become new microcapsule building blocks with porous surfaces. These microcapsules may act as stimuli-responsive nanocarriers and nanocontainers.

Heterogeneous interface adsorption of colloidal particles

Soft Matter ◽  
2017 ◽  
Vol 13 (36) ◽  
pp. 6234-6242 ◽  
Author(s):  
Dong Woo Kang ◽  
Jin Hyun Lim ◽  
Bum Jun Park
Keyword(s):  
Colloidal Particles ◽  
Electrolyte Concentration ◽  
Water Phase ◽  
Water Interface ◽  
Oil Water ◽  
Particle Adsorption

Particle adsorption to an oil–water interface depends on the electrolyte concentration in the water phase.

scholarly journals Transition Behaviors of Configurations of Colloidal Particles at a Curved Oil-Water Interface

Materials ◽  
2016 ◽  
Vol 9 (3) ◽  
pp. 138 ◽  
Author(s):  
Mina Lee ◽  
Ming Xia ◽  
Bum Park
Keyword(s):  
Colloidal Particles ◽  
Water Interface ◽  
Oil Water

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.

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.

Influence of an Additive-Free Particle Spreading Method on Interactions between Charged Colloidal Particles at an Oil/Water Interface

Langmuir ◽  
2016 ◽  
Vol 32 (19) ◽  
pp. 4909-4916 ◽  
Author(s):  
Peng Gao ◽  
Zonglin Yi ◽  
Xiaochen Xing ◽  
To Ngai ◽  
Fan Jin
Keyword(s):  
Colloidal Particles ◽  
Free Particle ◽  
Water Interface ◽  
Oil Water ◽  
Particle Spreading
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