Pickering Emulsions

Schröder, Anja; Corstens, Meinou N.; Ho, Kwok Ki; Schroën, Karin; Berton‐Carabin, Claire C.

doi:10.1002/9781119247159.ch2

Cited by 10 publications

(17 citation statements)

References 175 publications

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“…Taking into account the applicative interest of the Pickering sunscreen emulsions, the sensory description of such systems is awaited, but there is still a lack in the literature on this point .…”

Section: Introductionmentioning

confidence: 99%

Sensory perception of textural properties of cosmetic Pickering emulsions

Terescenco

Hucher

Picard

et al. 2020

Intern J of Cosmetic Sci

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Objective The increasing interest for the Pickering emulsions is based on the possibility to replace classical emulsifiers by the solid particles. This approach is extremely attractive for the cosmetic field. But, the main difficulty is to obtain stable emulsions with appreciable skin feel. However, there is no information about the texture of such systems. The aim of this study is to formulate and describe the textural properties of cosmetic Pickering emulsions compared with conventional systems. Methods Three metal oxides were selected: titanium dioxide, zinc oxide and silicon dioxide, able to form stable and totally emulsified systems. A conventional emulsifier was used to formulate the emulsion of reference. Finally, the mixture of two emulsifying systems, combining both, surfactant and particles, was also studied. Then, a sensory panel was asked to quantify the intensities of the perception of the seven discriminating attributes. Results Each particle brought its properties to the textural perception of the emulsion. TiO2 particles ensured the whitening effect of the emulsions, SiO2 provided the screech residue, whereas ZnO gave intermediate results. The conventional surfactant was perceived as glossy, greasy and more difficult to spread. The particle/surfactant mixtures gave mostly in‐between results. Conclusions The study shows that the sensory profile of Pickering emulsions is indirectly and directly governed by the particle properties used for the emulsion stabilization: indirectly, through affecting the emulsion orientation (oil in water or water in oil), the droplet organization and viscosity, and directly, through the particle perception on the skin surface.

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Section: Introductionmentioning

confidence: 99%

Sensory perception of textural properties of cosmetic Pickering emulsions

Terescenco

Hucher

Picard

et al. 2020

Intern J of Cosmetic Sci

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“…Therefore, the polymer particle size should be in sub-micrometers or smaller with a narrow particle size distribution to obtain a stable micrometer-sized oil droplet of Pickering emulsion. Moreover, the obtained polymer particle’s water contact angle should be close to 90° to form a stable emulsion. , In this work, MMA homopolymers and MMA-S copolymer particles were synthesized by emulsion ITP using both PMTMA 12 -I and P(MTMA-QAC 12 ) 12 -I macro-CTAs. For comparison, P(MMA-MTMA) particles were also prepared by emulsion CRP.…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Polymer Particles Containing Quaternary Ammonium for Antimicrobial Particulate Surfactants and Defoaming

Kamlangmak

Eiamprasert

Chaiyasat

et al. 2021

ACS Appl. Polym. Mater.

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The preparation of multifunctional polymer particles containing quaternary ammonium molecules by emulsion iodine transfer polymerization (emulsion ITP) via polymerization-induced self-assembly was proposed for the first time. Poly(2methacryloyloxy ethyl trimethyl ammonium chloride-dimethylamino ethyl methacrylate 12 alkyl chain length)-iodide (P(MTMA-QAC 12 ) 12 -I) was first synthesized by solution iodine transfer polymerization. It was simultaneously used as a macro-chain transfer agent and emulsifier in emulsion ITP. All conditions smoothly proceeded without coagulation, where the polymerization reached high conversion within only 4 h. When the methyl methacrylate-styrene (P(MMA-S)) copolymer was synthesized in the second block as P(MTMA-QAC 12 ) 12 -b-P(MMA-S) 462 , the water contact angle of the obtained particles was close to 90°, which was the most appropriate to use as the particulate surfactant. The P(MTMA-QAC 12 )12-b-P(MMA-S) 462 particles represented a good antimicrobial property based on the positive charge quaternary ammonium groups existing on surfaces. Using such P(MTMA-QAC 12 ) 12 -b-P(MMA-S) 462 nanoparticles (∼90 nm) at 1 wt %, the obtained cutting oil emulsion model represented high colloidal stability with approximately 50 μm oil droplet size without any coalescence. Moreover, foam formation was significantly reduced compared to the commercial cutting oil. According to their excellent properties, P(MTMA-QAC 12 ) 12 -b-P(MMA-S) 462 nanoparticles would be effectively used as a particulate surfactant in Pickering emulsion, including defoamers and antimicrobial agents.

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“…Capillary forces refer to attractive interactions among the solid particles at the oil–water interface. Usually, the overlap of interfacial perturbations of two close particles causes an attraction, which induces the formation of a strong interfacial shell [ 24 , 30 ]. The capillary forces depend on wettability, particle size [ 24 ] and particle shape’ namely, non-spherical particles can improve the perturbations, resulting in increased forces [ 31 ].…”

Section: Mechanisms and Parameters Influencing Pickering Emulsion Sta...mentioning

confidence: 99%

“…Particle–particle networks address the attraction interactions among solid particles remaining in the continuous phase and/or particles covering droplets, forming unique and flocculated network structures [ 30 ]. The network is enhanced due to particle bridging—which occurs when a particle is adsorbed onto a droplet and interacts with a neighbour droplet interface [ 24 ]—and particle aggregation, i.e., when the particles aggregate, creating a disordered network stabilising, simultaneously, all the particles [ 24 ]. These particle–particle networks can improve the emulsion stability since this tight network prevents the coalescence of the dispersed phase [ 24 ].…”

Section: Mechanisms and Parameters Influencing Pickering Emulsion Sta...mentioning

confidence: 99%

“…The main role of the solid particles in PEs is the formation of a physical and robust barrier at the oil–water interface preventing emulsion destabilisation, mainly against coalescence [ 23 ]. This barrier decreases the interfacial tension between two immiscible liquids, as happens with a conventional stabiliser [ 24 ].…”

Section: Introduction To Pickering Emulsionsmentioning

confidence: 99%

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Pickering Emulsions Based in Inorganic Solid Particles: From Product Development to Food Applications

et al. 2023

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Pickering emulsions (PEs) have attracted attention in different fields, such as food, pharmaceuticals and cosmetics, mainly due to their good physical stability. PEs are a promising strategy to develop functional products since the particles’ oil and water phases can act as carriers of active compounds, providing multiple combinations potentiating synergistic effects. Moreover, they can answer the sustainable and green chemistry issues arising from using conventional emulsifier-based systems. In this context, this review focuses on the applicability of safe inorganic solid particles as emulsion stabilisers, discussing the main stabilisation mechanisms of oil–water interfaces. In particular, it provides evidence for hydroxyapatite (HAp) particles as Pickering stabilisers, discussing the latest advances. The main technologies used to produce PEs are also presented. From an industrial perspective, an effort was made to list new productive technologies at the laboratory scale and discuss their feasibility for scale-up. Finally, the advantages and potential applications of PEs in the food industry are also described. Overall, this review gathers recent developments in the formulation, production and properties of food-grade PEs based on safe inorganic solid particles.

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Pickering Emulsions

Cited by 10 publications

References 175 publications

Sensory perception of textural properties of cosmetic Pickering emulsions

Sensory perception of textural properties of cosmetic Pickering emulsions

Multifunctional Polymer Particles Containing Quaternary Ammonium for Antimicrobial Particulate Surfactants and Defoaming

Pickering Emulsions Based in Inorganic Solid Particles: From Product Development to Food Applications

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