| 초록 |
Core-shell type silica-polymer nanocomposites were synthesized by grafting 2-hydroxyethyl methacrylate (HEMA) from the surface of silica nanoparticles (SiO2NPs) via surface-initiated single-electron transfer mediated living radical polymerization (SET-LRP). After immobilization of initiators, poly(2-hydroxyethyl methacrylate) (PHEMA) chains were covalently grafted from the surface of SiO2NPs by SET-LRP in the presence of copper wire and PMDETA as a catalyst system resulting in the formation of silica-polymer (SiO2/PHEMA) core-shell type structures. The SiO2/PHEMA composites were characterized by FTIR, XPS, TGA, and XRD. The hydroxyl group of SiO2/PHEMA could be converted to carboxylic group using succinic anhydride by esterification reaction, which gave higher loading capacities for silver ion (Ag+). |
