PROCESS FOR THE PREPARATION OF MICROSPHERES AND MIPROCESS FOR THE PREPARATION OF MICROSPHERES AND MICROSPHERES MADE THEREBY CROSPHERES MADE THEREBY

摘要

A process for the preparation of a microsphere comprising a coating composed of one or more silica nanoparticles layers, comprises the steps of: a) providing a microsphere of polymeric material, the said microsphere having adsorbed on its surface one or more surfactants; and b) causing a layer of silica nanoparticles to coat the surface of the said microsphere by means of seeded polymerization of alkyl silicates onto the surface of said microsphere.