Three-phase contact parameters measurements for silica-mixed cationic–anionic surfactant systems

Alexandrova, L.; Rao, K. Hanumantha; Forsberg, Karl; Grigorov, L.; Pugh, R.J.

doi:10.1016/j.colsurfa.2009.07.028

Cited by 19 publications

(8 citation statements)

References 18 publications

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“…The Stefan− Reynolds model can be solved using the Runge−Kutta method of the fourth order (i.e., the numerical method) because the model is a complex nonlinear differential equation. The surface tension measurements used in this calculation are available in ref 24.…”

Section: ■ Experimental Methods and Materialsmentioning

confidence: 99%

The Stefan–Reynolds Model and the Modified Stefan–Reynolds Model for Studying Bubble–Particle Attachment Interactions in the Context of Flotation

et al. 2019

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Bubble−particle attachment is the key step for successful flotation. Modeling of attachment interactions between air bubbles and particles after their collision can be analyzed using the Stefan−Reynolds model (immobile bubble surfaces) and the modified Stefan−Reynolds model (mobile bubble surfaces). However, these models have been rarely used, and the limitations of these models have not yet been reported. The objective of this paper is to address this matter under a wide range of experimental flotation conditions. It was found that the Stefan−Reynolds model can be used to determine the real bubble−particle hydrophobic constants at low surfactant concentrations. However, at high surfactant concentrations, the real bubble− particle hydrophobic constants cannot be determined, but the fictive bubble−particle hydrophobic constants can be obtained by using the linear extrapolation method. The same analysis was also performed using the modified Stefan−Reynolds model. The results showed that the attachment of quartz particles to air bubbles in the presence of dodecyl amine hydrochloride is accelerated due to the mobility of the air−water interface. This paper demonstrated that the limitations of the Stefan−Reynolds model and the modified Stefan−Reynolds model to analyze the bubble−particle attachment interactions can be addressed by introducing the fictive bubble−particle hydrophobic constants.

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Section: ■ Experimental Methods and Materialsmentioning

confidence: 99%

The Stefan–Reynolds Model and the Modified Stefan–Reynolds Model for Studying Bubble–Particle Attachment Interactions in the Context of Flotation

et al. 2019

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“…Mixed surfactants lead to better flotation performances, including increased recovery and enhanced selectivity to the target mineral (Rao and Forssberg., 1997;Wang et al, 2016Wang et al, , 2014Xu et al, 2017b., Xie et al, 2020aXie et al, 2020b;Shu et al,2020). Owing to the strong synergistic interactions between two surfactant molecules with oppositely charged head groups, a large number of mixed collectors may lead to low surface tension and lower critical micelle concentration(CMC) (Alexandrova et al, 2009;Rao and Forssberg., 1997;Wang et al, 2016Wang et al, , 2014Xu et al, 2017a. In the flotation process, different types of mixed cationic/anionic collectors are used for surface modification to adjust the wetting properties of feldspar particles.…”

Section: Introductionmentioning

confidence: 99%

Application of mixed collectors on quartz-feldspar by fluorine-free flotation separation and their interaction mechanism: A review

Li¹,

Ren²,

Xie³

et al. 2021

Physicochem. Probl. Miner. Process.

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Quartz and feldspar are usually exist in symbiosis in nature, and they are difficult to be separated effectively by conventional physical methods owing to their similarities in crystal structures and surface characteristics. Flotation is the most resultful method, and especially, flotation with hydrofluoric acid (HF) is the most efficient way. Because HF may cause serious environmental and health problems, the effective and environmentally friendly separation of quartz and feldspar remains a formidable challenge. The crystal structure, surface broken bonds, surface energy, and solid-liquid interface properties of quartz and feldspar are investigated in this paper. In particular, some types of mixed cationic/anion collectors and their interaction mechanism on the quartz and feldspar surfaces with acidic, alkaline, and neutral media in the absence of fluorine are discussed, and the grade and scheme of quartz and feldspar for the practical application are illustrated. This review proposes concrete research approaches and provides perspectives for the advanced processing of quartz and feldspar in an environmentally friendly and economical way.

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“…Also, Wang et al have been reported on the catanionic surfactant mixtures can form stable vesicles in the bulk solution . Alexandrova et al have found that the mixed surfactants of tetradecyltrimethylammonium bromide (C14TAB) and sodium alkyl sulphonates induced lower contact angles on silica as compared to the pure C14TAB due to the strong initial adsorption of surfactant complexes at the air‐solution interface, followed by the adsorption at the silica interface. Maiti et al have assumed into consideration of formation of an ion‐pair amphiphile (IPA) by the interaction between cetylpyridinium chloride (CPC) and sodium dodecylsulfate (SDS), and studied their transformation into coacervates, micelles, precipitates, vesicles, and other phases in solution.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Properties of Dodecyltrimethylammonium Bromide (DTAB) and SodiumDodecyl Sulphate (SDS) Rich Surfactants in Aqueous Medium, At T = 293.15, 298.15, and 303.15 K

Sachin¹,

Karpe²,

Singh³

et al. 2018

Macromolecular Symposia

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The physicochemical properties of Dodecyltrimethylammonium Bromide (DTAB) and Sodium Dodecylsulfate (SDS) rich surfactants in aqueous medium have been studied by surface tension, viscosity, density, and sound velocity at T = 293.15, 298.15, and 303.15 K. The DTAB concentration varies from 0.0001 to 0.03 mol · L−1 in the presence of ≈0.01 mol · L−1 SDS and the SDS concentration varies from 0.001 to 0.015 mol · L−1 in the presence of ≈0.005 mol · L−1 DTAB, so that the concentrations of cationic (DTAB‐rich) and anionic (SDS‐rich) solutions are taken in the ratio of 3:1. The density (ρ) and sound velocity (μ) data are used for calculating apparent molar volume (Vϕ), friccohesity (σ), isentropic compressibility (Ks,ϕ), surface tension (γ), and viscosity (η). These parameters reveals that the relative solute‐solvent and solute‐solute interactions of SDS‐DTAB and DTAB‐SDS in an aqueous medium with the help of physicochemical properties (PCPs).

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Three-phase contact parameters measurements for silica-mixed cationic–anionic surfactant systems

Cited by 19 publications

References 18 publications

The Stefan–Reynolds Model and the Modified Stefan–Reynolds Model for Studying Bubble–Particle Attachment Interactions in the Context of Flotation

The Stefan–Reynolds Model and the Modified Stefan–Reynolds Model for Studying Bubble–Particle Attachment Interactions in the Context of Flotation

Application of mixed collectors on quartz-feldspar by fluorine-free flotation separation and their interaction mechanism: A review

Physicochemical Properties of Dodecyltrimethylammonium Bromide (DTAB) and SodiumDodecyl Sulphate (SDS) Rich Surfactants in Aqueous Medium, At T = 293.15, 298.15, and 303.15 K

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