| 초록 |
In this study, PNIPAAm-grafted thermoresponsive hollow-polymeric-shell (HPS) particles with a connecting holes the outside were prepared from surface-modified colloidal silica (CS) with poly(ethylene glycol) methyl ether-3-(triethoxysilyl)propyl isocyanate (PEGME-IPTES) as templates. The PNIPAAm-grafted CS particles were prepared by modified silica with 3-(trimethoxysilyl) propyl methacrylate (MPS) and PEGME-IPTES by the polymerization of poly(N-isopropylacrylamide) (PNIPAAm), then the modified silica core with PEGME-IPTES on the surface were removed by etching with hydrofluoric acid. In order to confirm the LCST property of the HPS particles , the transition of transmittance and the change of particle diameter according to the temperature change were measured through UV-vis spectroscopy, DLS and microscope. In addition, the size and shape of the HPS particles were determined by TEM and SEM. |
