| 초록 |
Recently, novel nano- and micrometer sized hollow capsules have been prepared by LbL(layer by layer) self-assembly of polyelectrolytes onto charged colloidal particles, followed by decomposition of the core. However, relatively little attention has been directed toward the functionalization of the interiors of these hollow capsules. Here, we describe novel fabrication of polyelectrolyte hollow capsules whose interiors were polymerized by styrene sulfonate (SS) monomers. Polyelectrolyte hollow capsules, KPS(potassium peroxodisulfate)/[PAH(polyallyamine hydrochloride)/PSS(polystyrene sulfonate)]2/PAH, were fabricated by the layer-by-layer (LbL) assembly technique on MF(melamine-formaldehyde) colloidal particles, followed by decomposition of MF cores in HCl solution. The filling of the capsules by PSS was performed by “grafting from” method. The hollow capsules after “grafting from” polymerization of SS monomer showed either cave-in or semi-sphere shapes. The shape of the capsules after polymerization was strongly dependent on the content of the SS monomers, implying the capability of the shape control of the resulting nano particles in our system. Thus, we have found that the polyelectrolyte hollow capsules reported here successfully served as a nano reactor for the polymerization which also allows the manipulation of the shape of the nano particles. Additionally, we expect that polymerized PSS between inner and outer capsules represent the different property. |
