Breaking of double emulsions based on electrohydrodynamics principles

Spasić, Aleksandar M.; Jovanovic, Jovan M.; Manojlović, Vaso; Jovanović, Mića

doi:10.1016/j.jcis.2016.06.061

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…The particle sedimentation is further described by the Stokes’ law, which relates the settling velocity to the square of the particle radius, to the difference in density of solid and liquid, to the gravity as well as to the inverse dynamic viscosity of the liquid. [ 41–42 ] For the large calcined particles this leads to settlement at the bottom of the film. In contrast, the small remilled particles show lower trend to sediment and are distributed homogeneously within the whole hybrid electrolyte layer.…”

Section: Resultsmentioning

confidence: 99%

Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending

Wirtz

Linhorst

Veelken

et al. 2020

Electrochemical Science Adv

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Hybrid electrolytes are developed to meet the requirements of safety, performance, and manufacturing for electrolytes suitable for Li-ion batteries with Li-anodes. Recent challenges-in addition to these key properties-emphasize the importance of sustainability. While compromising between these three objectives, the currently available materials are still well below the targeted goals. Three important issues for the design of hybrid electrolytes are (i) the role of the morphology and surface state of the ceramic particles in the polymer matrix, (ii) the dependence of salt concentration and ionic conductivity and, (iii) the effects of substituting part of the polyethylene oxide (PEO), with biopolymers. Electrolyte films were prepared from PEO, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZO:Ta), and biopolymers with varying contents of these components by a solution casting method. The films were analyzed with respect to structural and microstructural characteristics by DSC, Raman spectroscopy, and SEM. Ionic conductivity was evaluated by electrochemical impedance spectroscopy. Most interesting, when comparing films with LLZO:Ta versus without, the content of LiTFSI required for the maximum conductivity in the respective systems is different: a higher LiTFSI concentration is required for the former type. Overall, addition of LLZO:Ta as well as partial substitution of PEO by chitosan mesylate or cellulose acetate decrease the ionic conductivity. Thus-at least in the present approaches-a loss in performance is the drawback from attempts to enhance the safety by LLZO:Ta additions and sustainability by biopolymer blending of hybrid electrolytes.

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Section: Resultsmentioning

confidence: 99%

Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending

Wirtz

Linhorst

Veelken

et al. 2020

Electrochemical Science Adv

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“…This feature of multi-phase droplets is relatively less explored. Only a few studies have explored the breakups within a certain range of electric and hydrodynamic properties [ 13 , 14 , 16 , 25 , 30 , 95 , 152 ]. In one of the earliest studies, Ha and Yang established the breakups of conducting emulsion droplets comprised of inhomogeneous inner phase encapsulated by an outer membrane phase suspended in silicone oil [ 25 ].…”

Section: Multi-phase Emulsion Dropletsmentioning

confidence: 99%

“…Subsequently, the validation of the model was reported, and more accurate models emerged [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. Recent EHD studies have explored more complex EHD interface topologies related to multiple phase emulsion droplets, and also covered the broader aspects, such as the emulsion instabilities, breakups, and particles manipulation at the emulsion interface forming novel colloidal assemblies [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. Though it has been almost six decades since the research in this area commenced, it is only until recently that a few studies pertaining to the droplet EHD with applicative prospects have been reported [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ,…”

Section: Introductionmentioning

confidence: 99%

Electro-Hydrodynamics of Emulsion Droplets: Physical Insights to Applications

et al. 2020

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The field of droplet electrohydrodynamics (EHD) emerged with a seminal work of G.I. Taylor in 1966, who presented the so-called leaky dielectric model (LDM) to predict the droplet shapes undergoing distortions under an electric field. Since then, the droplet EHD has evolved in many ways over the next 55 years with numerous intriguing phenomena reported, such as tip and equatorial streaming, Quincke rotation, double droplet breakup modes, particle assemblies at the emulsion interface, and many more. These phenomena have a potential of vast applications in different areas of science and technology. This paper presents a review of prominent droplet EHD studies pertaining to the essential physical insight of various EHD phenomena. Here, we discuss the dynamics of a single-phase emulsion droplet under weak and strong electric fields. Moreover, the effect of the presence of particles and surfactants at the emulsion interface is covered in detail. Furthermore, the EHD of multi-phase double emulsion droplet is included. We focus on features such as deformation, instabilities, and breakups under varying electrical and physical properties. At the end of the review, we also discuss the potential applications of droplet EHD and various challenges with their future perspectives.

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“…Considering Marangoni instabilities of the first order and possible electrical analogue, the EC process, in some extent, was elucidated. The Marangoni instability of the first order has been explained theoretically in [6,7,[47][48][49][50]. It is shown that if there is an adverse temperature gradient of high enough magnitude across a thin liquid film with a free surface, such a layer could become unstable and lead to cellular convection.…”

Section: Ec Processmentioning

confidence: 99%

“…Finally, both the qualitative and quantitative physical pictures of the EC process are presented and discussed in more detail in Ref. [6,7,47,50].…”

Section: Fig 7 the Electrical Analogue Of The Marangoni Instability Mechanism Liquid I -Dtk Liquid Ii -H3po4 E -The Electrical Potential mentioning

confidence: 99%

Solvent extraction and entrainment problem

Spasić¹,

Manojlović²,

Jovanovic³

2020

Metall Mater Eng

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Applications of solvent extraction operations and processes play one of the most important roles in Hydrometallurgy. Therefore, in this brief review, some general concepts for selected representative applications are discussed. Also, one particular entrainment problem solution is discussed in some more details. At first, the selected general concepts for metal production of copper and uranium from their ores are presented. Then after, the leaching-solvent extraction-electro winning process for copper is shown. Finally, the extraction of uranium from wet phosphoric acid is discussed.

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Breaking of double emulsions based on electrohydrodynamics principles

Cited by 8 publications

References 15 publications

Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending

Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending

Electro-Hydrodynamics of Emulsion Droplets: Physical Insights to Applications

Solvent extraction and entrainment problem

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Breaking of double emulsions based on electrohydrodynamics principles

Cited by 8 publications

References 15 publications

Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending

Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending

Electro-Hydrodynamics of Emulsion Droplets: Physical Insights to Applications

Solvent extraction and entrainment problem

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Product

Resources

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Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending

Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending