Research Progress on Adsorption Properties of Solid Particles with Different Morphologies at the Interface of Pickering Emulsions
Pickering emulsions represent a novel type of emulsion that employs solid particles as stabilizers.Solid particles can be tightly arranged at the oil-water interface by irreversible adsorption to form a monolayer or multilayer film,providing a spatial physical barrier for droplets.Compared with traditional emulsions,Pickering emulsions have attracted wide attention due to their advantages of high stability,low toxicity and low cost.The stability of Pickering emulsion is affected by many factors,such as solid particle properties,concentration,pH and preparation method,etc.Among them,the morphology of solid particles is one of the important factors that determines the interface adsorption behavior and the stabilization ability of emulsion.The different morphology of the solid particles leads to different ways of stabilizing the emulsion at the oil-water interface,mainly includes electrostatic interaction,capillary force,and mutual entanglement to form three-dimensional network structure.However,there is currently no systematic summary on the effects of solid particles with different morphologies on the interfacial adsorption characteristics of Pickering emulsions.Based on this,this review summarized the types of solid particles with different morphologies used to stabilize Pickering emulsions at home and abroad in recent years,including spherical,rod-like,thread-like,flaky,cubic,nanotube,dumbbell,ellipsoid and disc-like,etc.It focused on their interfacial adsorption properties for stabilizing Pickering emulsions,such as adsorption activity,arrangement and assembly behavior,inter-particle interactions and emulsion viscosity,etc.Based on the special interfacial adsorption properties of Pickering emulsions,the applications of Pickering emulsions in food fields such as active component encapsulation and delivery,lipid substitution,interfacial catalysis,antimicrobial and so on were reviewed.Furthermore,the study discussed the problems in the study of Pickering emulsions stabilized by non-spherical solid particles,and analyzed the development potential for active component encapsulation and delivery.The review provided the reference for the in-depth research and application of Pickering emulsions stabilized by solid particles with different morphologies.
solid particlesdifferent morphologiesPickering emulsionsinterfacial adsorption propertiesfood field
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