Janus particles based on Pickering emulsions for colloidal surfactants
발표자
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초록
내용
Janus particles consist of two or more phases with different physical and chemical properties within a single particle. In particular, spherical colloidal Janus particles have attracted attention as solid surfactants due to their characteristic of being located at the interface of droplets within an emulsion. Among the methods for producing Janus particles, the masking method is to cover part of the surface of a particle and expose the remaining part, and modify the exposed surface. This is a practical method for mass producing Janus particles. In this study, silica particles were adopted as nanoparticles and paraffin wax as the oil phase. The degree of silica penetration into the paraffin wax was controlled by adjusting the contact angle between the wax and the particle using a cationic surfactant. After modifying the colloidosome with a coupling agent and removing the wax, Janus silica particles with hydroxyl groups on one side and aminopropyl groups on the other side were produced.