Inversion of particle-stabilized emulsions of partially miscible liquids by mild drying of modified silica particles

White, K. A.; Schofield, Andrew B.; Wormald, Philip; Tavacoli, Joe W.; Binks, Bernard P.; Clegg, Paul S.

doi:10.1016/j.jcis.2011.03.074

Cited by 64 publications

(61 citation statements)

References 37 publications

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“…The phase inversion method is widely used to produce particlestabilized emulsions from oil in water to water in oil and viceversa [217,227,228]. Unlike emulsions stabilized by a single surfactant type, Fig.…”

Section: Phase Inversion Of Particle-stabilized Systemsmentioning

confidence: 99%

Phase inversion emulsification: Current understanding and applications

Perazzo

Preziosi

Guido

2015

Advances in Colloid and Interface Science

196

121

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Section: Phase Inversion Of Particle-stabilized Systemsmentioning

confidence: 99%

Phase inversion emulsification: Current understanding and applications

Perazzo

Preziosi

Guido

2015

Advances in Colloid and Interface Science

196

121

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“…The surface modification of the silica tracers used to incorporate the fluorescent dye (FITC) renders the particle surface positively charged (z potential at pH 2 ¼ +80 AE 2.5 mV). 43,44 Melamine-formaldehyde (MF) resin particles (diameter ¼ 5.41 AE 0.12 mm, microparticles GmBH, Germany) also have a positive charge at pH 2 (+66.0 AE 5.2 mV) and were added at 0.4% v/w in the water protein fibril suspensions. The particle z potentials were measured using a ZetaSizer instrument (Malvern, UK).…”

Section: Microscopy and Particle Trackingmentioning

confidence: 99%

Unravelling adsorption and alignment of amyloid fibrils at interfaces by probe particle tracking

2011

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We report the first direct, non-invasive experimental evidence of a 2D isotropic-nematic transition for highly anisotropic nanoparticles at liquid-liquid interfaces by using passive fluorescent particle tracking. In order to illustrate the potential of this approach on systems of high real practical and biological relevance, we select as a model anisotropic nanoparticles b-lactoglobulin amyloid fibrils of varying aspect ratios. Upon nanoparticle adsorption at the interface, we follow, in real time and as a function of fibril length and bulk concentration, the development of a 2D nematic phase by studying the anisotropy in probe particle traces. We furthermore demonstrate the long-range nature of the nematic phase by calculating order parameters for the traces as high as 0.8 over 10 2 to 10 3 mm 2 areas. The presented route is independent of the system investigated, and thus these findings open a new, general strategy for the experimental assessment of 2D structural changes at anisotropic fluid-fluid interfaces.

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“…Neutrally wetting particles can halt the demixing by attaching to and jamming at the liquid interface [5,6,9]. However, off-neutral particles induce a spontaneous curvature C 0 when attached to liquid interfaces [15,19,29,30]. This is because they are pushed together as coarsening decreases the interfacial area, while the interparticle contacts are not situated at the liquid interface (where they would be for θ = 90…”

Section: Discussionmentioning

confidence: 99%

“…This is an important consideration, as it has been shown that the presence of APTES on the silica surface is crucial for meeting the neutral-wetting requirement in the W-L system [18,19] -it has been suggested that the surface decorations act to disrupt the wetting layer of lutidine which spontaneously forms around the particles when approaching the phase separation temperature [20,21]. For the NPs, DLS returned a particle radius of 0.08 µm and TEM returned 0.063 µm with a polydispersity of 15% (Fig.…”

Section: B Particle Synthesismentioning

confidence: 99%

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Particle-size effects in the formation of bicontinuous Pickering emulsions

et al. 2015

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We demonstrate that the formation of bicontinuous emulsions stabilized by interfacial particles (bijels) is more robust when nanoparticles rather than microparticles are used. Emulsification via spinodal demixing in the presence of nearly neutrally wetting particles is induced by rapid heating. Using confocal microscopy, we show that nanospheres allow successful bijel formation at heating rates two orders of magnitude slower than is possible with microspheres. In order to explain our results, we introduce the concept of mechanical leeway i.e. nanoparticles benefit from a smaller driving force towards disruptive curvature. Finally, we suggest that leeway mechanisms may benefit any formulation in which challenges arise due to tight restrictions on a pivotal parameter, but where the restrictions can be relaxed by rationally changing the value of a more accessible parameter.

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Inversion of particle-stabilized emulsions of partially miscible liquids by mild drying of modified silica particles

Cited by 64 publications

References 37 publications

Phase inversion emulsification: Current understanding and applications

Phase inversion emulsification: Current understanding and applications

Unravelling adsorption and alignment of amyloid fibrils at interfaces by probe particle tracking

Particle-size effects in the formation of bicontinuous Pickering emulsions

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