Hybrid core-shell microparticles comprising a polymer core and a silica shell having a controlled structure and surface

摘要

A hybrid microparticle comprising a polymer core and a shell at least partially surrounding the polymer core, comprising a silicon dioxide layer; characterized by an RF value, wherein the RF value is defined as the quotient of an external surface accessible for the adsorption of nitrogen and a surface which is calculable based on an arithmetic mean diameter of the hybrid microparticle perceived as an ideal sphere has a structure selected from: - closed smooth and the shell has an RF value between 1 and 1.5; - closed hilly and the shell has an RF value between 1.51 and 3; or - open and the shell has an RF value greater than 3.01.