Equilibrium Electric Double Layer of Charged Spherical Colloidal Particles: Effect of Different Distances of Minimum Ion Approach to The Particle Surface

2010 ◽  
Vol 114 (22) ◽  
pp. 7548-7556 ◽  
Author(s):  
J. J. López-García ◽  
M. J. Aranda-Rascón ◽  
C. Grosse ◽  
J. Horno
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Colloidal Particles ◽  
Particle Surface

scholarly journals Electric double layer and electrokinetic potential of pectic macromolecules in sugar beet

2008 ◽  
pp. 21-28
Author(s):  
Tatjana Kuljanin ◽  
Ljubinko Levic ◽  
Nevena Misljenovic ◽  
Gordana Koprivica
Keyword(s):  
Sugar Beet ◽  
Double Layer ◽  
Electric Double Layer ◽  
Colloidal Particles ◽  
Colloidal Particle ◽  
Electrokinetic Potential ◽  
Shear Plane ◽  
Colloidal System ◽  
Cu Ions ◽  
Measurable Property

Electrokinetic potential is an important property of colloidal particles and, regarding the fact that it is a well defined and easily measurable property, it is considered to be a permanent characteristic of a particular colloidal system. In fact, it is a measure of electrokinetic charge that surrounds the colloidal particle in a solution and is in direct proportion with the mobility of particles in an electric field. Gouy-Chapman-Stern-Graham's model of electric double layer was adopted and it was proven experimentally that the addition of Cu++ ions to sugar beet pectin caused a reduction in the negative electrokinetic potential proportional to the increase of Cu++ concentration. Higher Cu++ concentrations increased the proportion of cation specific adsorption (Cu++ and H+) with regard to electrostatic Coulombic forces. Consequently, there is a shift in the shear plane between the fixed and diffuse layers directed towards the diffuse layer, i.e. towards its compression and decrease in the electrokinetic potential or even charge inversion of pectin macromolecules.

Field-induced dipolar attraction between like-charged colloids

Soft Matter ◽  
2018 ◽  
Vol 14 (22) ◽  
pp. 4520-4529 ◽  
Author(s):  
Chunyu Shih ◽  
John J. Molina ◽  
Ryoichi Yamamoto
Keyword(s):  
Numerical Simulations ◽  
Electric Fields ◽  
Double Layer ◽  
Electric Double Layer ◽  
Colloidal Particles ◽  
Direct Numerical Simulations ◽  
Ac Electric Fields ◽  
Charged Colloids ◽  
Anisotropic Interactions

The field induced anisotropic interactions between like-charged colloidal particles is studied using direct numerical simulations, where the polarization of the electric double layer is explicitly computed under external AC electric fields.

scholarly journals An electric double layer of colloidal particles in salt-free concentrated suspensions including non-uniform size effects and orientational ordering of water dipoles

2016 ◽  
Vol 18 (1) ◽  
pp. 234-243 ◽  
Author(s):  
Jun-Sik Sin ◽  
Hak-Chol Pak ◽  
Kwang-Il Kim ◽  
Kuk-Chol Ri ◽  
Dok-Yong Ju ◽  
...  
Keyword(s):  
Double Layer ◽  
Electric Potential ◽  
Size Effects ◽  
Relative Permittivity ◽  
Electric Double Layer ◽  
Colloidal Particles ◽  
Concentrated Suspensions ◽  
Uniform Size ◽  
Orientational Ordering

Non-uniform size effects and orientational ordering of water dipoles influence the relative permittivity and electric potential in suspension.

Synergistic Inhibition Effect of Organic Salt and Polyamine on Water-Sensitive Shale Swelling and Dispersion

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Gui Wang ◽  
Hui Du ◽  
Shuxian Jiang
Keyword(s):  
Crystal Lattice ◽  
Water Activity ◽  
Double Layer ◽  
Electric Double Layer ◽  
Drilling Fluid ◽  
Particle Surface ◽  
Interlamellar Spacing ◽  
Organic Salt ◽  
Adsorptive Capacity ◽  
Inhibition Performance

Drilling fluid with strong inhibition performance is crucial in drilling water-sensitive shale formations. An organic salt compound and polyamine were tested for their ability to inhibit shale swelling and dispersion, both individually and in combination. The linear shale swelling rate can be suppressed to less than 20% when the inhibitors are combined, and the hot rolling recovery rate of shale cuttings can improve up to 85%. The interlamellar spacing d001, zeta potential, particle size distribution, water activity, and adsorptive capacity of clays were tested to determine the suppression mechanism of the shale inhibitors. These results show that the organic salt YJS-2 functioned remarkably in crystal lattice fixation, electric double-layer compression, adjustment of water activity, and enhancement of polymer adsorption onto the clay particle surface. Polyamine can enter the clay mineral interlayer and compress the electric double-layer to some extent. It can also synergistically function with YJS-2. Therefore, a combination of these two shale inhibitors worked synergistically to provide crystal lattice fixation, electric double-layer compression, water activity adjustment, adsorption on the surface of clay particles, and encapsulation.

Electrode for Electric Double Layer Capacitor Made of Carbonized and Activated Cotton Cloth

2014 ◽  
Vol 134 (5) ◽  
pp. 360-361
Author(s):  
Masumi Fukuma ◽  
Takayuki Uchida ◽  
Yukito Fukushima ◽  
Jinichi Ogawa ◽  
Katsumi Yoshino
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Cotton Cloth ◽  
Electric Double Layer Capacitor ◽  
Double Layer Capacitor
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