Double emulsions are liquid dispersion systems known also as emulsions of emulsions, in which the droplets of one dispersed liquid (emulsion, microemulsion, liposome, etc) are further dispersed in another liquid (water or oil), producing double layered liquid droplets.

One-step double emulsification is useful for forming double emulsions with large inner drops and very thin shells, which are optimal as microcapsules. It is also useful for emulsifying fluids with non-Newtonian flow characteristics, very high viscosity, or in which the wetting properties make single emulsification difficult.

2022年12月24日 · Double emulsions are complex emulsion systems with a wide range of applications across different fields, such as pharmaceutics, food and beverage, materials sciences, personal care, and dietary supplements. Conventionally, surfactants are required for the stabilization of double emulsions.

Multiple emulsions are multifarious polydispersed systems where both oil in water and water in oil emulsion exists all together which are stabilized by lipophillic and hydrophilic surfactants respectively. The ratio of these surfactants is important in achieving stable multiple emulsions.

Double emulsions (W/O/W) are complex sys-tems that consist of a inner (W/O) emulsion dispersed in a second continuous water phase. These emulsions (W/O/W) are systems with a middle oil layer, which acts as a liquid membrane (Figure 2). Fig. 2. Schema of a) W/O/W and b) O/W/O emulsions.

Double emulsion: one droplet of one material in a droplet of another material in a continuous phase. Microcapsule and microsphere: made by enclosing the active compound within a cavity surrounded by a semipermeable membrane or within a solid matrix. [2]

2015年9月9日 · Several types of microchannels have been developed to fabricate double-emulsion droplets including double-T-junction microchannel, double-cross-shaped microchannel and several three-dimensional (3D) microchannels.

2015年12月14日 · Double emulsion is a complex system of an emulsion in an emulsion, where the droplets of the dispersed phase themselves contain even smaller dispersed droplets. An emulsion is a dispersion of droplets of one liquid in another …

In this study, we propose an original two-step approach for the fabrication of double nanoemulsions with a final size below 200 nm. The process consists of the formulation of a primary water-in-oil (w 1 /O) nanoemulsion by high-pressure homogenization, followed by the re-emulsification of this primary emulsion by a low-energy method to preserve ...

Double emulsions are droplets with one other droplet inside. Their core–shell structure has attracted wide attention in various fields (Vladisavljević, Nuumani & Nabavi 2017). In pharmaceuticals, one common technique is to use double emulsion for drug encapsulation of highly hydrophilic molecules.