PREPARATION METHOD OF CORE-SHELL TYPE NANOCOMPOSITE PARTICLES IN SUPERCRITICAL CARBON DIOXIDE

摘要

A method for preparing core-shell type nanocomposite particles is provided to facilitate a separation of the product by pressure reduction of a reactor, and to produce the deformation-free product without causing a solubilization problem during a solvent removal step. A method for preparing core-shell type nanocomposite particles includes a steps of dispersing a surface-modified inorganic oxide in supercritical carbon dioxide, and using an organic monomer and a surfactant to prepare the core-shell type nanoparticles comprising an inorganic oxide core and an organic polymer shell layer, wherein the surface-modified inorganic oxide is obtained by surface-modifying an inorganic oxide using a silane coupling agent. The inorganic oxide is at least one selected from titanium dioxide, silicon dioxide, dialuminum trioxide, calcium carbonate, zirconium trioxide, zinc oxide, zinc dioxide, and tin dioxide. Further, the organic polymer is one or more selected from methyl mthacrylate, glycidyl methacrylate, styrene and divinyl benzene.