Interactions between bubble and particles of key minerals of diasporic bauxite through the extended DLVO theory

Zhang, Ningning; Pang, Tian; Han, Rui; Chen, Songjiang; Li, Zhen; Yu, Yuexian; Shi, Zhongyu; Liu, Lijun; Qu, Jinzhou; Zhou, Anning

doi:10.1016/j.ijmst.2021.11.002

Cited by 54 publications

(4 citation statements)

References 46 publications

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“…Studying the stability of emulsion includes Van der Walls attraction energy (UA) and Poisson-Boltzmann electrostatic repulsion (UR) energy evaluation [34,35] . UA is a function of attractive forces like Debye, London, and dipole-dipole forces [36] .…”

Section: Theoretical Model For Stability Of Latexmentioning

confidence: 99%

Optimizing synthesis and application of an enhanced oil recovery agent: stability assessment of the optimized nanostructured PNIPAM/PS core–shell polymer using a developed DLVO-based model

Mohammadipour,

Amiri,

Dashti

et al. 2024

Colloid Polym Sci

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To improve the efficiency of hydrophilic polymers in oil reservoirs, a method encapsulates the polymer within a protective shell, safeguarding the core polymer and enabling controlled release in demanding, high-temperature conditions. Poly(N-isopropylacrylamide) nanoparticles are encapsulated with Poly styrene shells through emulsion polymerization in this study.Varying the amounts of shell monmer and crosslinking agents resulted thick, sphere-shaped shells with homogeneous morphology, which protects the core polymer and enabling controlled release. Structural and morphological properties are characterized using Fourier-transform infrared spectroscopy (FTIR), Proton nuclear magnetic resonance (H 1 NMR), Dynamic Light Scattering (DLS), and Scanning electron microscope (SEM) imaging. Increasing the styrene amounts lead to larger particles, while higher crosslinker amounts result in a narrower size distribution. Thermal testing indicates heat resistance up to 300°C, suitable for EOR applications. Rheological tests determine an optimal 30-day release for the PNIPAM core, with the CS polymer showing increased viscosity under harsh conditions. DLVO theory and experimental results demonstrate good stability and energy barriers at room temperature, but decreased stability and increased agglomeration at higher temperatures. Thickening the styrene shell leads to particle agglomeration and unsuitable stability. The study confirms the effectiveness of the model in analyzing CS colloidal latex systems.

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Section: Theoretical Model For Stability Of Latexmentioning

confidence: 99%

Optimizing synthesis and application of an enhanced oil recovery agent: stability assessment of the optimized nanostructured PNIPAM/PS core–shell polymer using a developed DLVO-based model

Mohammadipour,

Amiri,

Dashti

et al. 2024

Colloid Polym Sci

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“…• Hydrophobic attraction VS The decrease in the surface hydrophilicity was associated with the adsorption of the collector, whose hydrocarbon radicals were the cause of the appearance of the interaction forces caused by a change in the structure of the liquid, i.e., the forces of hydrophobic attraction. When the thickness h of the wetting film decreased, when the particles approached, the energy of their interaction U was determined by the additive contribution of the energies of a different nature [68][69][70]:…”

Section: Flotation Of Gold Microdispersions Using Carrier Mineralsmentioning

confidence: 99%

Studying the Flotation of Gold-Bearing Ores Using Carrier Minerals

Evdokimov,

Golikov,

Zadkov

et al. 2024

Minerals

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This work is aimed at the analysis of the development of flotation technology by applying carrier minerals. Based on the concepts of continuum mechanics, a theoretical analysis of the influence of the carrier minerals (wall) on the motion of a single solid particle is provided, taking into account their hydrodynamic interaction (in the case of low Reynolds numbers). A correction was obtained in the form of a ratio of the particle size to its distance from the wall to take into account the influence of the wall on the hydrodynamic force acting on the particle. The influence of the wall is manifested through a rapid approximation of the liquid vortex flow in the gap between the solid wall and the particle to the steady-state mode, accompanied by the suppression of the transverse movement of particles. When the liquid slides along a wall-mounted gas–liquid layer with a reduced viscosity, the liquid flow increases in the interfacial gap, which can be analyzed by a dimensionless correction that includes values describing the properties of a continuous medium (dynamic viscosity) and a disperse phase (geometric particle size). The reason for the decrease in the induction time when gold grains adhere to each other is assumed to be due to the forces of hydrophobic attraction (when the grains have a mirror-smooth surface) and the sliding of the flow along the hydrophobic surface of the particles along the gas layer (when the grains have a rough surface). When polydisperse particles are aggregated, the threshold energy of the fast coagulation was established to be lower than that arising during the interaction of monodisperse particles, whose aggregation requires a large depth of the potential pit. Performing natural experiments on the ore using a rougher concentrate as a carrier material showed that the concentrate yield decreases by 20.52% rel. In the second case, the gold extraction was higher by 4.69% abs. While maintaining the achieved level of gold extraction, the double mixing of the rougher concentrate and the initial feed increased the gold content in the rougher concentrate from 4.97 to 6.29 g/t.

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“…The research shows that the hydrophobic interaction energy decays rapidly beyond an interparticle distance of 4–5 nm, and the strong interaction energy may be 2–3 orders of magnitude greater than an electric repulsion energy of coal particles in a CWS suspension. Therefore, it plays a predominant role in determining the properties of high concentration CWS with a very small distance between the coal particles. ,, …”

Section: Interactions In Cws Systemmentioning

confidence: 99%

“…Therefore, it plays a predominant role in determining the properties of high concentration CWS with a very small distance between the coal particles. 155,166,167 The hydrophobic interaction energy (V H ) of coal particles in CWS can be calculated by eq 6…”

Section: Interactions In Cws Systemmentioning

confidence: 99%

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Feng

et al. 2023

Energy Fuels

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Dispersants are chemical moieties that modify interfacial characteristics by adsorption at the solid–liquid interface, and they have been widely used in modern industrial production. This review focuses on the research and perspectives of anionic dispersants for coal–water slurry (CWS). Various common anionic dispersants are briefly summarized, including natural and synthetic species. The interactions between coal particles in the CWS suspension, including van der Waals attraction and electrostatic repulsion, are described by the DLVO (Derjaguin–Landau–Verwey–Overbeek) theory. Due to the hydrophobic interaction and the steric effect resulting from the adsorption of polymer dispersants, the extended DLVO theory is introduced to elucidate the various interactions in the CWS system. Based on the interactions between the coal particles, the adsorption behaviors at the coal–water interface, and the interactions between coal and water, the dispersion and stabilization mechanisms are systematically and theoretically discussed. According to the variations of interaction energies between the coal particles, the use of anionic polymer dispersants can weaken the hydrophobic attraction and enhance the steric hindrance and electrostatic repulsion. Also, the rheological behaviors of CWSs are outlined, with emphasis on the pipeline transportation of CWS and the three-parameter Herschel–Bulkley model. Additionally, the properties of anionic dispersants for CWS can be improved by adjusting their chemical structures such as molecular weight, side chain length, rigidity and flexibility of the molecular chain, and variety, quantity, position, and proportion of hydrophobic and hydrophilic groups. In view of the relationships between the structure and property, a direction on the selection and preparation of dispersant for CWS is suggested. Finally, the current challenges and future perspectives of dispersants for CWS are put forward.

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Interactions between bubble and particles of key minerals of diasporic bauxite through the extended DLVO theory

Cited by 54 publications

References 46 publications

Optimizing synthesis and application of an enhanced oil recovery agent: stability assessment of the optimized nanostructured PNIPAM/PS core–shell polymer using a developed DLVO-based model

Optimizing synthesis and application of an enhanced oil recovery agent: stability assessment of the optimized nanostructured PNIPAM/PS core–shell polymer using a developed DLVO-based model

Studying the Flotation of Gold-Bearing Ores Using Carrier Minerals

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

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