The impact of mass transfer and interfacial expansion rate on droplet size in membrane emulsification processes

Rayner, Marilyn; Trägårdh, Gun; Trägårdh, Christian

doi:10.1016/j.colsurfa.2005.05.025

Cited by 59 publications

(40 citation statements)

References 31 publications

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“…The effect of kinetics of adsorption of surfactants at liquid-liquid interface on droplet size has been investigated by several workers (Schröder et al, 1998;Van der Graaf et al, 2004;Rayner et al, 2005). As a rule, the faster the surfactant molecules adsorb to the newly formed interface, the smaller the droplet size of the resultant emulsion becomes.…”

Section: Surfactant Typementioning

confidence: 99%

“…The main factors affecting the drop size are wetting properties and microstructure of the membrane (pore size distribution, pore shape, spatial distribution of the pores, pore tortuosity, etc), but other parameters also play an important role, such as transmembrane flux, shear stress on the membrane surface, viscosity of the continuous and dispersed phase, surfactant type and concentration, emulsion formulation, etc. The droplet size in ME has been predicted analytically, using several force balance and torque balance models (Timgren et al, 2010;De Luca et al, 2008;Christov et al, 2008;Williams et al, 1998;Hao et al, 2008;Xu et al, 2005) and computationally, using Computational Fluid Dynamics (CFD) simulations (Timgren et al, 2010;Kobayashi et al, 2004b;Abrahamse et al, 2001) and the Surface Evolver software (Rayner et al, 2004(Rayner et al, , 2005.…”

Section: Operating Parameters In Membrane Emulsificationmentioning

confidence: 99%

See 1 more Smart Citation

Production of uniform droplets using membrane, microchannel and microfluidic emulsification devices

Vladisavljević

Kobayashi

Nakajima

2012

Microfluid Nanofluid

324

265

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Section: Surfactant Typementioning

confidence: 99%

Section: Operating Parameters In Membrane Emulsificationmentioning

confidence: 99%

Production of uniform droplets using membrane, microchannel and microfluidic emulsification devices

Vladisavljević

Kobayashi

Nakajima

2012

Microfluid Nanofluid

324

265

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“…The numerical algorithm based on Lagrange's principle of virtual work, stating that a mechanical system in a state of equilibrium has a minimum in the system's total energy (Brakke, 1992). It is generally used for solving problems involving the minimization of surfaces (Brakke, 1992(Brakke, , 1996 with practical applications in the design of solder joints for microchips (Zhu, Wang, & Lou, 1998), prediction of the wetting of fibres (McHale & Newton, 2002), controlled production of liquid pillars used for pharmaceutical drug screening (Silver et al, 1999), and prediction of droplet sizes in membrane emulsification (Rayner, Tra¨ga˚rdh, & Tra¨ga˚rdh, 2005;Rayner, Tra¨ga˚rdh, Tra¨ga˚rdh, & Dejmek, 2004).…”

Section: Computer Modelling Of Surface Tension Phenomenamentioning

confidence: 99%

Liquid droplet-like behaviour of whole casein aggregates adsorbed on graphite studied by nanoindentation with AFM

Helstad

Rayner²,

Vliet³

et al. 2007

Food Hydrocolloids

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“…The effect of kinetics of adsorption of surfactant at oil-aqueous interface during DME on the droplet size has been investigated by Schröder et al (1998), Van der Graaf et al (2004), and Rayner et al (2005). The faster the surfactant molecules adsorb to the newly formed interface, the smaller the droplet size becomes.…”

Section: Effect Of Surfactantmentioning

confidence: 99%

Structured microparticles with tailored properties produced by membrane emulsification

Vladisavljević

2015

Advances in Colloid and Interface Science

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This paper provides an overview of membrane emulsification routes for fabrication of structured microparticles with tailored properties for specific applications. Direct (bottom-up) and premix (top-down) membrane emulsification processes are discussed including operational, formulation and membrane factors that control the droplet size and droplet generation regimes. A special emphasis was put on different methods of controlled shear generation on membrane surface, such as cross flow on the membrane surface, swirl flow, forward and backward flow pulsations in the continuous phase and membrane oscillations and rotations. Droplets produced by membrane emulsification can be used for synthesis of particles with versatile morphology (solid and hollow, matrix and core/shell, spherical and non-spherical, porous and coherent, composite and homogeneous), which can be surface functionalised and coated or loaded with macromolecules, nanoparticles, quantum dots, drugs, phase change materials and high molecular weight gases to achieve controlled/targeted drug release and impart special optical, chemical, electrical, acoustic, thermal and magnetic properties. The template emulsions including metal-in-oil, solid-in-oil-in-water, oil-in-oil, multilayer, and Pickering emulsions can be produced with high encapsulation efficiency of encapsulated materials and narrow size distribution and transformed into structured particles using a variety of different processes, such as polymerisation (suspension, mini-emulsion, interfacial and in-situ), ionic gelation, chemical crosslinking, melt solidification, internal phase separation, layer-by-layer electrostatic deposition, particle self-assembly, complex coacervation, spray drying, sol-gel processing, and molecular imprinting. Particles fabricated from droplets produced by membrane emulsification include nanoclusters, colloidosomes, carbon aerogel particles, nanoshells, polymeric (molecularly imprinted, hypercrosslinked, Janus and core/shell) particles, solder metal powders and inorganic particles. Membrane 2 emulsification devices operate under constant temperature due to low shear rates on the membrane surface, which range from (1−10) × 10 3 s −1 in a direct process to (1−10) × 10 4 s −1 in a premix process.Keywords: Membrane Emulsification; Polymeric microsphere; Microgel; Janus Particle; Core/Shell Particle, Colloidosome. Membrane emulsificationMembrane emulsification (ME) involves preparation of emulsions by pressing a pure dispersed phase or pre-emulsified mixture of the dispersed and continuous phase through a microporous membrane under controlled injection rate and shear conditions. In direct membrane emulsification (DME), one liquid (a dispersed phase) is injected through a microporous membrane into another immiscible liquid (the continuous phase) (Nakashima et al., 1991;, which leads to the formation of droplets at the membrane/continuous phase interface ( Figure 1a). In premix membrane emulsification (PME) (Figure 1b), a pre-emulsion is pressed through the membrane (...

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The impact of mass transfer and interfacial expansion rate on droplet size in membrane emulsification processes

Cited by 59 publications

References 31 publications

Production of uniform droplets using membrane, microchannel and microfluidic emulsification devices

Production of uniform droplets using membrane, microchannel and microfluidic emulsification devices

Liquid droplet-like behaviour of whole casein aggregates adsorbed on graphite studied by nanoindentation with AFM

Structured microparticles with tailored properties produced by membrane emulsification

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