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Engineering >> 2020, Volume 6, Issue 4 doi: 10.1016/j.eng.2019.08.017

Current Trends in Pickering Emulsions: Particle Morphology and Applicatio

a Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM, Montpellier 34095, France
b ICSM, CEA, CNRS, ENSCM, University of Montpellier, Marcoule 30207, France
c Institut Universitaire de France (IUF), Paris 75231, France

Received: 2019-05-14 Revised: 2019-06-12 Accepted: 2019-08-01 Available online: 2020-02-15

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Abstract

In recent years, Pickering emulsions and their applications have attracted a great deal of attention due to their special features, which include easy preparation and enhanced stability. In contrast to classical emulsions, in Pickering emulsions, solid microparticles or nanoparticles that localize at the interface between liquids are used as stabilizers, instead of surfactants, to enhance the droplet lifetime. Furthermore, Pickering emulsions show higher stability, lower toxicity, and stimuli-responsiveness, compared with emulsions that are stabilized by surfactants. Therefore, they can be considered attractive components for various uses, such as photocatalysis and the preparation of new materials. Moreover, the nanoparticle morphology strongly influences Pickering emulsion stability as well as the potential utilization of such emulsions. Here, we review recent findings concerning Pickering emulsions, with a particular focus on how the nanoparticles morphology (i.e., cube, ellipsoid, nanosheet, sphere, cylinder, rod, peanut) influences the type and stability of such emulsions, and their current applications in different fields such as antibacterial activity, protein recognition, catalysis, photocatalysis, and water purification.

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