Effect of interfacial properties on the drop size distribution of high internal phase ratio emulsions

Peker, Sümer; Bora, Kerem; Över, Yusuf

doi:10.1016/s0927-7757(00)00839-6

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…The emulsion was prepared in 300 g batches in a relatively standard way 23,24,25 . Firstly equal mass portions of kerosene (Recochem Inc) and the emulsifier were combined using a Russell Hobbs Hand-Held Mixer (RHMX1) in a stainless steel mixing bowl.…”

Section: Emulsion Binder Preparationmentioning

confidence: 99%

“…The emulsion was prepared in 300-g batches in a relatively standard way. − First, equal mass portions of kerosene (Recochem Inc.) and the emulsifier were combined using a Russell Hobbs handheld mixer (RHMX1) in a stainless steel mixing bowl. The emulsifier, sourced from Vic Chem, consisted of 60 wt % sorbitan monooleate and 40 wt % glycerol monooleate.…”

Section: Experimental Sectionmentioning

confidence: 99%

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Fast Agglomeration of Ultrafine Hydrophobic Particles Using a High-Internal-Phase Emulsion Binder Comprising Permeable Hydrophobic Films

Netten

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Galvin

2017

Ind. Eng. Chem. Res.

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A novel hydrophobic binder consisting of tightly-packed drops of aqueous salt solution, stabilized by thin films of oil, in the form of a high internal phase water-in-oil emulsion was used to agglomerate ultrafine hydrophobic particles in seconds to a size sufficient for their capture on a 150 micron screen. Almost complete recovery of the particles, extending from sizes of more than 100 microns to below 500 nanometers, was achieved. Examination of the process revealed that the agglomeration appears to be governed primarily by the length scale of the thin oil films, of order 30 nm, and their ability to efficiently deliver organic liquid to the particles quickly. Moreover, it appears that the hydrodynamic resistance that develops when a particle is 2 driven towards an interface is reduced due to the permeability of the films. Water permeation driven by osmosis also appears to assist the transport of the particles towards the interface.

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Section: Emulsion Binder Preparationmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Fast Agglomeration of Ultrafine Hydrophobic Particles Using a High-Internal-Phase Emulsion Binder Comprising Permeable Hydrophobic Films

Netten

Borrow

Galvin

2017

Ind. Eng. Chem. Res.

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“…Two main emulsification processes are used for their preparation: a batch process, in which all the components are mixed together, and a semibatch (two-step) process, by far the most widely used, in which the dispersed phase is progressively introduced into the continuous one under relatively gentle stirring conditions. This “incorporation step” is followed by a “homogenization step” in the same equipment. ,,,− …”

Section: Introductionmentioning

confidence: 99%

Influence of Semibatch Emulsification Process Conditions on The Physical Characteristics of Highly Concentrated Water-in-Oil Emulsions

Álvarez

Choplin

Sadtler

et al. 2010

Ind. Eng. Chem. Res.

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We studied the energy consumption per unit volume during preparation of highly concentrated water-in-oil emulsions in a two-step semibatch process. In particular, we studied the effect of two process variables, the water addition flow rate (Q w ) and the agitation speed (N). The oil used for emulsion preparation was n-dodecane, the surfactant was sorbitan monooleate (Span 80) and deionized water was used for the dispersed phase. The results obtained showed that two steps were required to get complete incorporation of the dispersed phase and a homogeneous and stable gel-emulsion. With the help of independent physical characteristics measurement performed at the end of the preparation process, we established two functional relationships, relating storage modulus (G′) with energy consumption (E v ), (G′ ∝ E v 0.6 ), and average liquid cell size (R m ) of the dispersed phase with energy consumption (E v ), (R m ∝ E V -0.3 ). A structural scaling law can be deduced that relates the elastic modulus to the reciprocal of the square of the average liquid's cell size of the gel-emulsion, corroborated by independent measurements and predicted by recent published models.

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Rheology of Polymer Blends

Utracki

2011

Encyclopedia of Polymer Blends

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The first polymer blend was patented in 1846 and since then blends have became ubiquitous. Blending may provide a full set of material properties, improving processability and/or specific properties. With the advancement of technology there is the notorious growth of complexity -while in the beginning blending involved two polymers, initially without a compatibilizer, more recent commercial alloys have up to five polymers, three compatibilizers, and frequently are reinforced with macro-or nanoparticles [1].Blends are classified as either thermodynamically miscible or immiscible, with the latter dominating. However, imposition of a flow affects the thermodynamic equi librium and it may enhance the miscibility of immiscible blends or vice-versa -there is an interrelation between rheology and thermodynamics. Similarly, flow affects the degree of deformation of the dispersed phase, thus in immiscible blends there are other interrelations between rheology and morphology, which affect the blend performance. To the complexity of polymer alloys and blends (PAB) behavior one must add the incorporation of solids, either in the form of filler and nanofiller particles or by simple fact of blending two components with widely different transition temperatures.Since the flow of PAB is complex, it is useful to revert to simple models, for example, for miscible blends to solutions or mixtures of polymer fractions, for immiscible blends to emulsions or suspensions, and for compatibilized blends to block copolymers (Table 2.1). It is also advisable to study flow behavior of multiphase systems at constant stress (not at constant deformation rate) [2,3].For miscible blends, the free volume theory predicts a positive deviation from the log-additivity rule (PDB, positively deviating blend). However, depending on the system and method of preparation, these blends may show a positive deviation, negative deviation, or additivity [4]. Upon mixing, the presence of specific interac tions may change the free volume and degree of entanglement, which in turn affect the flow behavior [5,6]. For immiscible blends the flow is similarly affected, but in addition there are at least three contributing phases: of the polymeric matrix, of the First Edition. Edited by Avraam I. Isayev.

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Effect of interfacial properties on the drop size distribution of high internal phase ratio emulsions

Cited by 9 publications

References 16 publications

Fast Agglomeration of Ultrafine Hydrophobic Particles Using a High-Internal-Phase Emulsion Binder Comprising Permeable Hydrophobic Films

Fast Agglomeration of Ultrafine Hydrophobic Particles Using a High-Internal-Phase Emulsion Binder Comprising Permeable Hydrophobic Films

Influence of Semibatch Emulsification Process Conditions on The Physical Characteristics of Highly Concentrated Water-in-Oil Emulsions

Rheology of Polymer Blends

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