High-viscoelasticity Pickering emulsion and preparing method and application thereof

Abstract

The invention provides multi-layer grafted silicon dioxide nanoparticles, layer-by-layer molecular imprints are used for covalently assembling amino-terminated silicon dioxide and aldehyde-terminated silicon dioxide, and the imprint process is repeated according to needs until the needed silicon dioxide layer number is reached. The invention further provides high-viscoelasticity Pickering emulsion prepared from the nanoparticles. The fractal silicon dioxide is synthesized through the layer-by layer molecular imprint technology and can be used for preparing the high-viscoelasticity Pickering emulsion, the obtained emulsion is high in viscoelasticity, high in stability and good in drug release degree. In addition, the used raw material silicon dioxide particles are low in price and easy to obtain, and the high-viscoelasticity Pickering emulsion is low in production cost and good in biocompatibility and therefore not limited when applied to the fields of food, cosmetics and medicine. The layer-by layer molecular imprint technology is easy to operate and industrialize.

Description

technical field [0001] The invention designs a Pickering emulsion, in particular relates to a highly viscoelastic Pickering emulsion and a preparation method and application thereof. Background technique [0002] Pickering emulsions are mainly stabilized by inorganic rigid particles or polymer soft particles with good surface wettability. These adsorbed particles hinder droplet coalescence by creating strong electrostatic repulsion, large steric hindrance or high interfacial viscosity, resulting in stable emulsions for many years (Pawar et al., 2011; Tambe et al., 1993). A stable Pickering emulsion is widely used in various fields, such as food, cosmetics, coatings, pesticides, and various industrial processes such as emulsion coalescence, metal cutting and cleaning, and synthesis of nanoparticles (Fang et al., 2015; Liu et al. al., 2006; Xiao et al., 2016). However, the opposite demulsification process also has crucial applications in some industrial processes such as ind...

AI Technical Summary

Problems solved by technology

However, pure silica particles are highly hydrophilic, which is not conducive to stabilizing Pickering emulsions as a particle emulsifier

In addition, there are no carboxyl or amino groups present on the surface of silica, so it cannot exhibit good pH response

Images