Detachment of particles and particle clusters from liquid/liquid interfaces

Sinn, Nico; Alishahi, M.; Hardt, Steffen

doi:10.1016/j.jcis.2015.06.050

Cited by 18 publications

(9 citation statements)

References 31 publications

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“…A similar process has been seen with solid particles. 35 Because of the lower surface tension of PP1 and the high interfacial tension in the water−PP1 system, multiple bubbles would coalesce at the interface to form a larger bubble. Bubbles would continue to coalesce until the buoyancy force of the larger bubble was able to overcome the interfacial tension.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Flow Regimes and Transition Criteria during Passage of Bubbles through a Liquid–Liquid Interface

2018

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The passage of a single bubble or a stream of bubbles through a liquid-liquid interface is a highly dynamic process that can result in a number of different outcomes. Previous studies focused primarily on a single bubble and single flow regime, and very few investigations have considered bubble streams. In the present work, six different liquid combinations made up of water, ethanol, a perfluorocarbon liquid, PP1, and one of three different viscosity silicone oils are tested with air bubbles from 2 to 6 mm in diameter rising between 5 and 55 cm/s. Both single bubbles and bubble streams varying in frequency from 5 to 40 bubbles/s are tested. High-speed imaging is used to capture and classify the flow regimes associated with each flow type. Four different flow regimes are identified for single-bubble passage, and six are found for bubble stream passage. On the basis of theoretical considerations, nondimensional numbers are developed for characterizing the flow regimes and maps are generated that distinguish them and define flow regime transitions.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Flow Regimes and Transition Criteria during Passage of Bubbles through a Liquid–Liquid Interface

2018

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“…This hypothesis is also supported by the fact that, when adding solutions of (already) aggregated particles to the emulsions, particles do not seem to adsorb at the droplet interface (data not shown). Aggregation of particles at interfaces is a known phenomenon (Sinn, Alishahi, & Hardt, 2015) and has been proposed as an alternative mechanism for the Pickering stabilization of oil-in-water emulsions in addition to the particle layer formation around the droplets. In this case, the steric particle-based barrier is not a simple monolayer or bilayer which is densely packed, but a region of a network of particles adsorbed at the interface with the whole aggregated structure held together by attractive inter-particle forces (Gautier et al, 2007;Tcholakova, Denkov, & Lips, 2008;Dickinson, 2010).…”

Section: Particle Accumulation and Aggregation At The Water-water Int...mentioning

confidence: 99%

Colloidal zein particles at water-water interfaces

et al. 2017

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“…Acidic modifying agents (SiO 2 -containing materials) are typically added to the steel slag after reduction as such materials can alter its viscosity, acidity coefficient (the mass fraction ratio of all acidic and alkaline substances in the slag), crystallization behavior, and other physical and chemical properties. [6][7][8] However, controlling the dissolution rate and homogenization behavior of the modifying agent remains an issue as it affects the fiber quality as well as the productivity and energy consumption. 9,10) Therefore, in order to optimize the production capacity of steel slag production, it is important to study the dissolution kinetics and mechanism of the modifying agent in the molten slag.…”

Section: Introductionmentioning

confidence: 99%

“….......................... (6). where D is the diffusion coefficient of SiO 2 particles in molten steel slag, which is a function of the slag temperature and viscosity according to the Stokes-Einstein relation:15,18,21) ............................ (7). …”

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confidence: 99%

Dissolution Mechanism of Modifying Agent in Fibrotic Process of Steel Slag

2021

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The kinetic behavior of SiO 2 dissolving in molten steel slag at 1 773-1 923 K was studied using a combination of high-temperature confocal scanning laser microscopy and a synthetic physical property tester. The experimental results showed that the change in slag electrical conductivity can characterize the homogenization process of the modifying agent in molten steel slag, and the dissolution process of the modifying agent is controlled by solute diffusion in the slag. The concentration difference between the boundary layer and the bulk of the slag is the primary driving force of the dissolution process. By increasing the reaction temperature, the SiO 2 particle dissolution rate in slag can be significantly increased. Moreover, the experimental data and model calculations revealed that the SiO 2 dissolution rate was the fastest when the total Fe (T.Fe) content was 14% and the acidity coefficient (M k ) was 1.5. The dissolution factors were defined to quantitatively evaluate the dissolution mechanism of particle by studying the dissolution process of slag with different components.

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Detachment of particles and particle clusters from liquid/liquid interfaces

Cited by 18 publications

References 31 publications

Flow Regimes and Transition Criteria during Passage of Bubbles through a Liquid–Liquid Interface

Flow Regimes and Transition Criteria during Passage of Bubbles through a Liquid–Liquid Interface

Colloidal zein particles at water-water interfaces

Dissolution Mechanism of Modifying Agent in Fibrotic Process of Steel Slag

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