Fabrication and characterization of microcapsule encapsulating EOR surfactants by microfluidic technique

Zhou, Fang; Cao, Xue-Ru; Yu, Yingying; Li, Min

doi:10.1016/j.colsurfa.2019.02.045

Cited by 20 publications

(10 citation statements)

References 31 publications

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“…The assembly of nanoparticles at the oil–water interface has received widespread attention and has been extensively studied by numerous investigators. These studies include but are not limited to food processing and production, − drug encapsulation, , environmental remediation, − and enhanced oil recovery. − The interest stems from the fact that particle-laden interfaces offer a route to controlled interfacial properties, including the ultimate stability of an emulsion. − Oil droplets surrounded by particles result in improved viscoelastic properties of the interface. Hence, emulsion breakup, coalescence, or coarsening can be circumvented or slowed. ,− …”

Section: Introductionmentioning

confidence: 99%

Probing the Interfacial Properties of Oil–Water Interfaces Decorated with Ionizable, pH Responsive Silica Nanoparticles

et al. 2023

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Particle-stabilized emulsions (Pickering emulsions) have recently attracted significant attention in scientific studies and for technological applications. The interest stems from the ease of directly assembling the particles at interfaces and modulating the interfacial properties. In this paper, we demonstrate the formation of stable, practical emulsions leveraging the assembly of ionizable, pH responsive silica nanoparticles, surface-functionalized by a mixture of silanes containing amine/ammonium groups, which renders them positively charged. Using pH as the trigger, the assembly and the behavior of the emulsion are controlled by modulating the charges of the functional groups of the nanoparticle and the oil (crude oil). In addition to their tunable charge, the particular combination of silane coupling agents leads to stable particle dispersions, which is critical for practical applications. Atomic force microscopy and interfacial tension (IFT) measurements are used to monitor the assembly, which is controlled by both the electrostatic interactions between the particles and oil and the interparticle interactions, both of which are modulated by pH. Under acidic conditions, when the surfaces of the oil and the nanoparticles (NPs) are positively charged, the NPs are not attracted at the interface and there is no significant reduction in the IFT. In contrast, under basic conditions in which the oil carries a high negative charge and the amine groups on the silica are deprotonated while still positively charged because of the ammonium groups, the NPs assemble at the interface in a closely packed configuration yielding a jammed state with a high dilatational modulus. As a result, two oil droplets do not coalesce even when pushed against each other and the emulsion stability improves significantly. The study provides new insights into the directed assembly of nanoparticles at fluid interfaces relevant to several applications, including environmental remediation, catalysis, drug delivery, food technology, and oil recovery.

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Section: Introductionmentioning

confidence: 99%

Probing the Interfacial Properties of Oil–Water Interfaces Decorated with Ionizable, pH Responsive Silica Nanoparticles

et al. 2023

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“…Figure 2d aqueous droplets also can be tailored by altering the breakup rates at the junctions. With all these merits, we anticipate that this approach could be well utilized for preparation of monodisperse or multi-disperse double emulsions with highly controlled droplet size (Fang et al 2019;Hwang, Oh, and Oh 2005). Therefore, the advantage of this technique is that it can provide a higher degree of control over the double emulsion properties.…”

Section: Preparation Of the O/w/o Emulsionmentioning

confidence: 99%

Recent progress in oil-in-water-in-oil (O/W/O) double emulsions

Zhi

Liu

Wang

et al. 2022

Critical Reviews in Food Science and Nutrition

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Oil-in-water-in-oil (O/w/O) double emulsions are recognized as an advanced design route for oil structuring that shows promising applications in the pharmaceutical, cosmetic, and food fields. This review summarizes the main research advances of O/w/O double emulsions over the past two decades. it mainly focuses on understanding the preparation strategies, stabilization mechanism, and potential applications of O/w/O double emulsions. Several emulsification strategies are discussed, including traditional two-step emulsification method, phase-inversion approach, membrane emulsification, and microfluidic emulsification. Further, the role of interfacial stabilizers and viscosity in the stability of O/w/O double emulsions will be discussed with a focus on synthetic emulsifiers, natural biopolymer sand solid particles for achieving this purpose. Additionally, analytical methods for evaluating the stability of O/w/O double emulsions, such as advanced microscopy, rheology, and labeling assay are reviewed taking into account potential limitations of these characterization techniques. Moreover, possible innovative food applications are highlighted, such as simulating fat substitutes to decrease the trans-or saturated fatty acid content and developing novel delivery and encapsulation systems. This review paves a solid way for the exploration of O/w/O double emulsions toward large-scale implementation within the food industry.

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“…Microcapsules with core–shell structures are widely used in industrial and biomedical domains, such as thermal energy storage, 1 enhanced oil recovery, 2 targeted drug delivery and controlled release, 3,4 and cell encapsulation and culture. 5 They also occur naturally in the form of, e.g.…”

Section: Introductionmentioning

confidence: 99%

Robust fabrication of ultra-soft tunable PDMS microcapsules as a biomimetic model for red blood cells

et al. 2023

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Fabrication and characterization of microcapsule encapsulating EOR surfactants by microfluidic technique

Cited by 20 publications

References 31 publications

Probing the Interfacial Properties of Oil–Water Interfaces Decorated with Ionizable, pH Responsive Silica Nanoparticles

Probing the Interfacial Properties of Oil–Water Interfaces Decorated with Ionizable, pH Responsive Silica Nanoparticles

Recent progress in oil-in-water-in-oil (O/W/O) double emulsions

Robust fabrication of ultra-soft tunable PDMS microcapsules as a biomimetic model for red blood cells

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