Nanoparticle silica-stabilised oil-in-water emulsions: improving emulsion stability

Binks, Bernard P.; Whitby, Catherine P.

doi:10.1016/j.colsurfa.2004.10.116

Cited by 303 publications

(207 citation statements)

References 36 publications

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“…By adding low concentrations of cationic surfactant it is possible to modify the wettability of the particles such that they form a stable emulsion. By studying particle stability, zeta potential, contact angles and emulsion lifetimes it has been shown that the cationic surfactants adsorb in a conformation where the charged head-group neutralizes a charged site on the particle surface and the hydrocarbon tail is exposed making the surface increasingly hydrophobic [17]. At higher surfactant concentrations various new effects emerge including destabilization of the emulsion [19] and double emulsion inversion [20].…”

Section: Introductionmentioning

confidence: 99%

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Influence of particle composition and thermal cycling on bijel formation

White¹,

Schofield²,

Binks³

et al. 2008

J. Phys.: Condens. Matter

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Abstract. Colloidal particles with appropriate wetting properties can become very strongly trapped at an interface between two immiscible fluids. We have harnessed this phenomenon to create a new class of soft materials with intriguing and potentially useful characteristics. The material is known as a bijel: bicontinuous interfacially-jammed emulsion gel. It is a colloid-stabilized emulsion with fluid-bicontinuous domains. The potential to create these gels was first predicted using computer simulations. Experimentally we use mixtures of water and 2,6-lutidine at the composition for which the system undergoes a critical demixing transition on warming. Colloidal silica, with appropriate surface chemistry, is dispersed while the system is in the single-fluid phase; the composite sample is then slowly warmed well beyond the critical temperature. The liquids phase separate via spinodal decomposition and the particles become swept up on the newly created interfaces. As the domains coarsen the interfacial area decreases and the particles eventually become jammed together. The resulting structures have a significant yield stress and are stable for many months. Here we begin to explore the complex wetting properties of fluorescently-tagged silica surfaces in water-lutidine mixtures, showing how they can be tuned to allow bijel creation. Additionally we demonstrate how the particle properties change with time while they are immersed in the solvents.

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Section: Introductionmentioning

confidence: 99%

“…A related interplay of adsorption, wettability and emulsification has recently been investigated in the context of combinations of silica particles and cationic surfactants [17] [18] [19] [20]. The cases explored involved silica particles which initially have a pronounced preference for the water-phase of an oil-water system.…”

Section: Introductionmentioning

confidence: 99%

Influence of particle composition and thermal cycling on bijel formation

White¹,

Schofield²,

Binks³

et al. 2008

J. Phys.: Condens. Matter

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“…The large development of nanomaterials fostered during the last decade the use of micro/nanoparticles as additives in the formulation and for the control of the stability of emulsions and foams [23,24,25]. The subject presents several "smart" and "green" aspects.…”

Section: Particles In Emulsion and Foam Technologymentioning

confidence: 99%

Smart and green interfaces: From single bubbles/drops to industrial environmental and biomedical applications

Dutschk

Karapantsios

Liggieri

et al. 2014

Advances in Colloid and Interface Science

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Interfaces can be called Smart and Green (S&G) when tailored such that the required technologies can be implemented with high efficiency, adaptability and selectivity. At the same time they have also to be eco-friendly, i.e. products must be biodegradable, reusable or simply more durable. Bubble and drop interfaces are in many of these smart technologies the fundamental entities and help develop smart products of the everyday life.Significant improvements of these processes and products can be achieved by implementing and manipulating specific properties of these interfaces in a simple and smart way, in order to accomplish specific tasks. The severe environmental issues require in addition attributing ecofriendly features to these interfaces, by incorporating innovative , or, sometime, recycle materials and conceiving new production processes which minimize the use of natural resources and energy. Such concept can be extended to include important societal challenges related to support a sustainable development and a healthy population.The achievement of such ambitious targets requires the technology research to be supported by a robust development of theoretical and experimental tools, needed to understand in more details the behavior of complex interfaces. A wide but not exhaustive review of recent work concerned with green and smart interfaces is presented, addressing different scientific and technological fields. The presented approaches reveal a huge potential in relation to various technological fields, such as nanotechnologies, biotechnologies, medical diagnostics, new or improved materials.

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“…Nonetheless, several studies (Aveyard et al, 2003;Binks and Lumsdon, 2000a;Binks and Whitby, 2005;Binks et al, 2007) have widely characterized the effect of particles wettability (hydrophobicity) and sizes on the stability to creaming/sedimentation of O/W and W/O emulsions.…”

Section: Introductionmentioning

confidence: 99%

Silica Nanoparticles for the Stabilization of W/O Emulsions at HTHP Conditions for Unconventional Reserves Drilling Operations

Ghosn

Mihelic²,

Hochepied

et al. 2017

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-A novel generation of drilling fluids based on the principle of Pickering emulsions was prepared in this work using three different types of commercial silica nanoparticles with various hydrophobicity and particle sizes. We demonstrated that a threshold of nanoparticles concentration was necessary to stabilize the emulsions which strongly depended upon the particles wettability (hydrophobicity) and sizes. Nonetheless, on increasing the water phase volume fraction, a catastrophic inversion from Water-in-Oil (W/O) to Oil-in-Water (O/W) was obtained for emulsions prepared using amphiphilic silica nanoparticles. Particles wettability has proven to be strongly affected by the pH of the aqueous phase. However, changing the salinity of the brine phase did not have remarkable effects neither on the stability to coalescence/sedimentation nor on the droplet size distribution of the emulsions prepared. Oscillatory rheology illustrates that addition of clay particles boosts fluids thixotropic properties which experienced full recovery of gel strength even after aging. The drilling fluids prepared were aged for 16 h at 350°F (177°C) and 500 psi (35 bar) and provided high stability contrary to surfactant stabilized Oil-Based-Mud (OBM) that failed completely after aging. NOMENCLATURE cShear rate, 1/t, s À1

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Nanoparticle silica-stabilised oil-in-water emulsions: improving emulsion stability

Cited by 303 publications

References 36 publications

Influence of particle composition and thermal cycling on bijel formation

Influence of particle composition and thermal cycling on bijel formation

Smart and green interfaces: From single bubbles/drops to industrial environmental and biomedical applications

Silica Nanoparticles for the Stabilization of W/O Emulsions at HTHP Conditions for Unconventional Reserves Drilling Operations

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