Microgels self-assembly at liquid/liquid interface as stabilizers of emulsion: Past, present &amp; future

Arrebola, Iván Navarro; Billon, Laurent; Aguirre, Garbiñe Elorriaga

doi:10.1016/j.cis.2020.102333

Cited by 31 publications

(14 citation statements)

References 104 publications

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“…[27] Microgels, as soft colloids, are desired emulsifiers for stabilizing emulsions because they combine the benefits of both surfactants and particles. [28,29] Microgels-stabilized O/W Pickering emulsions have been well developed and used in a wide range of applications, including drug delivery, sensors and interfacial catalysis. [30][31][32][33] However, due to their intrinsic hydrophilicity, most microgels cannot solely stabilize W/O Pickering emulsions.…”

Section: Introductionmentioning

confidence: 99%

Temperature‐Responsive Pickering Double Emulsions Stabilized by Binary Microgels

Guan,

Li,

Jiang

et al. 2023

Chemistry An Asian Journal

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Microgels are excellent emulsifiers that can self‐assemble to reduce interfacial tension and form a steric barrier at an oil‐water interface. Herein, we report a two‐step emulsification approach to prepare oil‐in‐water‐in‐oil (O/W/O) Pickering double emulsions through the dispersion of microgels in two immiscible phases. The stabilization mechanism depends on the uneven distribution and adsorption of hydrophilic water‐swollen microgels and hydrophobic octanol‐swollen microgels on either outer water droplets or inner oil droplets. Our results reveal that binary microgels outperformed single microgels in terms of interfacial tension reduction and emulsion stabilization. Notably, the binary microgel‐stabilized Pickering double emulsions show excellent temperature responsiveness owing to the intrinsic thermal sensitivity of microgels. Consequently, the selective and rapid release of encapsulated substances in different phases can be achieved through the adjustment of the ambient temperature.

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Section: Introductionmentioning

confidence: 99%

Temperature‐Responsive Pickering Double Emulsions Stabilized by Binary Microgels

Guan,

Li,

Jiang

et al. 2023

Chemistry An Asian Journal

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“…In contrast to traditional Pickering emulsions stabilized by rigid particles, microgels as so colloids are regarded as more desirable emulsiers because they can stretch and deform at the oil-water interface. [1][2][3][4][5] Poly(N-isopropylacrylamide) (PNIPAM)-based microgels are one of the most investigated types of so colloidal particles, as their deformability and stimuli-responsiveness endow them with unique interfacial behaviours, which vary according to their functional groups and microstructure. [6][7][8][9] The different functional groups in microgels also endow as-prepared microgel-stabilized emulsions with multiple functions.…”

Section: Introductionmentioning

confidence: 99%

Non-covalent reconfigurable microgel colloidosomes with a well-defined bilayer shell

et al. 2022

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“…That is, in order to prepare w/o emulsions, the particle should be generally hydrophobic enough (θ > 90°). Currently, synthetic particles, such as polystyrene latex, modified silica, − microgels, − and others have been used for stabilizing w/o emulsions.…”

Section: Introductionmentioning

confidence: 99%

Water-in-Oil Pickering Emulsions Stabilized by Hydrophobized Protein Microspheres

Jiang

et al. 2022

Langmuir

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Water-in-oil (w/o) Pickering emulsions have gained considerable attention in colloid science and daily applications. However, for the formation of w/o emulsions, especially those with high internal water content, the particulate stabilizers are required to be sufficiently hydrophobic, and synthetic or chemically modified particles have been mostly reported until now, which are not biocompatible and sustainable. We present a zein protein-based microsphere derived from the Pickering emulsion template, in which protein microspheres are feasibly in situ hydrophobized by silica nanoparticles, enabling the stabilization of w/o Pickering emulsions. The effects of microsphere concentration, water/oil volume ratio, oil types, and pH on the stabilization of prepared w/o emulsions are systematically studied, revealing prominent characteristics of the controllable size, high water fraction, universal adaptation of oils, as well as broad pH stability. As a demonstration, the Pickering emulsion effectively encapsulates vitamin C and shows high stability for long storage duration against ultraviolet radiation/heat. Therefore, this novel proteinaceous particle-stabilized w/o Pickering emulsion has great potential in the delivery and protection of water-soluble bioactive substrates.

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Microgels self-assembly at liquid/liquid interface as stabilizers of emulsion: Past, present & future

Cited by 31 publications

References 104 publications

Temperature‐Responsive Pickering Double Emulsions Stabilized by Binary Microgels

Temperature‐Responsive Pickering Double Emulsions Stabilized by Binary Microgels

Non-covalent reconfigurable microgel colloidosomes with a well-defined bilayer shell

Water-in-Oil Pickering Emulsions Stabilized by Hydrophobized Protein Microspheres

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