Synthesis and Characterization of Thermoresponsive Hollow - Shell Polymeric Nanocapsules Based on Colloidal Silica
발표자
()
초록
내용
In this study, thermoresponsive polymeric hollow-shell nanoparticles with a hole connecting the outside with the inside were synthesized from colloidal silica (CS) and poly(ethylene glycol) methyl ether-3-(triethoxysilyl)propyl isocyanate (PEGME-IPTES) as templates. PEGME-IPTES was synthesized using a 3-(triethoxysilyl) propyl isocyanate (IPTES) with poly(ethylene glycol) methyl ether (PEGME) in the presence of dibutyltin dilaurate. The nanoparticles were prepared by modified silica with 3-methacryloxypropyltrimethoxysilane (MPS) and PEGME-IPTES by the polymerization of poly(N-isopropylacrylamide) (PNIPAAm), then the silica core and PEGME-IPTES chain were removed by etching with hydrofluoric acid. Thermoresponsive polymeric hollow nanoparticles were characterized by 1H NMR, 13C NMR, UV-vis and FT-IR spectroscopies. The particle size distribution was also determined with DLS, TEM images.