Surfactant-Free Emulsions and Polymer-Stabilization of Emulsions Used in Skin Care ProductsRavi Krishnamurthy
pickering emulsionstriggered releaseProcessing convenience and formulation flexibility frequently require the delivery of the silicone oils as emulsions. The shelf life of the latter is achieved kinetically, in the most cases via the addition of surfactants. On the other hand, surfactants are the ...
, utilization of solid particles, near- and super-critical carbon dioxide), colloidal stabilization (e.g., the addition of hydrophobic polymers into oil droplets, utilization of megasonic irradiation), and characterization techniques (single-droplet detection technique) of surfactant-free emulsions....
In this context, also surfactant-free emulsions and microemulsions (SFE/SFME) gain more and more attention for several applications, e.g. for extraction, solubilisation, separation techniques as well as for chemical processing [[16], [17], [18], [19], [20], [21], [22], [23]]. Such...
[...]optimized for rheological characterization of complex fluids and soft solids, including dispersions, emulsions, polymerandsurfactantsolutions, pastes and gels. malvern.com malvern.com 提供多种测量系统,可以测试复杂流体及软固体的流变特性,如分散体系、乳液、聚合物及表面活性剂溶液、糊剂及凝胶。
Emulsions are mixtures of two immiscible liquids, such as oil and water, stabilized by an emulsifier. Emulsions are thermodynamically unstable systems that generally break down over a short time through a variety of physicochemical destabilizing processes, e.g., gravitational separation, flocculation, ...
lower redox potentials than that of Py. Furthermore, the resulting particles could adsorb on oil‒water interfaces and work as effective Pickering-type emulsifiers. Suspension polymerization of vinyl monomer-in-water Pickering emulsions stabilized with PPy and PMPy nanoparticles resulted in the ...
Examples of galenic forms for the use of surfactant-free emulsions are: Fluid or semi-solid emulsion, for example: Body moisturizing milk; Moisturizing milk for the face; Body moisturizing lotion; Moisturizing lotion for the face; Emulsions for sensitive skin. ...
At low ionic strength, the emulsions are insensitive to cationic surfactant concentration. This behavior is consistent with the effect of the electrical double layer. A few implications of micelle exclusion to emulsion stability and its dependence on surfactant structure are discussed....
The main problem with emulsions, however, is the presence therein of surfactants which are required to form a stable emulsion and also to overcome the wetting and adherency problems of the emulsions. Unfortunately, the surfactants remain in the film after cross-linking and adversely affect the ...