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Updated: Jun 1, 2026

Measurement of the Rheology of Crude Oil in Equilibrium with CO2 at Reservoir Conditions
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Measurement of the Rheology of Crude Oil in Equilibrium with CO2 at Reservoir Conditions

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Shear-induced coalescence of oil-in-water Pickering emulsions

Catherine P Whitby1, Franziska E Fischer, Daniel Fornasiero

  • 1Ian Wark Research Institute, University of South Australia, Mawson Lakes, South Australia, Australia. catherine.whitby@unisa.edu.au

Journal of Colloid and Interface Science
|June 11, 2011
PubMed

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Colloids

Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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Coagulation01:06

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Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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Cohesion

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