![]() ![]() A wide range of nanoparticles of various chemical surfaces and shapes can be used to produce Pickering emulsions. In contrast to conventional emulsions, Pickering emulsions are surfactant-free emulsions stabilized by fine solid particles. A century later, these emulsions are once again in the news 11, 12. Pickering emulsion biomaterials drug delivery microspheres nanoparticles. Pickering emulsion name refers to one of the two pioneering researchers in the early 1900s 9, 10. Pickering emulsions provide an efficient platform for interfacial catalysis, but product separation and catalyst recycling rely on time- and energy-consuming. ![]() In this article, we give an overview of Pickering emulsions, focusing on some kinds of solid particles commonly serving as emulsifiers, three main types of products from Pickering emulsions, morphology of solid particles and as-prepared materials, as well as applications in different fields. Applications to nanostructured materials are promising. Pickering emulsions allow the control of drug delivery. Various stabilizing particles are working: either inorganic or organic. Pickering emulsions are fine dispersions of minute droplets of two immiscible phases stabilized by solid particles adsorbed at the liquid-liquid interphase. Pickering emulsions can be applied in a wide range of fields, such as biomedicine, food, fine chemical synthesis, cosmetics, and so on, by properly tuning types and properties of solid emulsifiers. Pickering emulsions have outstanding properties controlled by both formulation and process parameters. Unlike traditional emulsions, particles in Pickering emulsions are positioned at the interface between oil and water and act as stabilizer to improve droplet stability. Pickering emulsions are composed of oil phase, particles and aqueous phase. Besides, they are more biocompatible when solid particles employed are relatively safe in vivo. Pickering Emulsions by Using Alum as Stabilizer. Substituting solid particles for traditional surfactants, Pickering emulsions are more stable against coalescence and can obtain many useful properties. Pickering emulsion, a kind of emulsion stabilized only by solid particles locating at oil-water interface, has been discovered a century ago, while being extensively studied in recent decades. ![]()
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