| 초록 |
Organic-inorganic hybrid core-shell nanocomposites composed of poly(ethylene glycol) methyl ether (mPEG) and surface modified Barium titanate nanoparticles (BaTiO3 NPs) were successfully synthesized via the direct facile esterification reaction under such mild conditions. The surface of BaTiO3 NPs was modified by 3-glycidoxypropyl trimethoxysilane in order to prepare epoxy groups functionalized BaTiO3 NPs, and then refluxed in ethanol solution of dilute hydrochloric acid to convert the epoxy groups into alkyl-hydroxyl units. Subsequently, the mPEG chains were attached to the surface of BaTiO3 NPs by esterification reaction between alkyl-hydroxyl units at the nanoparticle surface and carboxylic acid terminated mPEG. FT-IR, XPS, EDX, XRD, TGA, SEM, TEM and DLS were employed to investigate the chemical structure, morphology, thermal properties, the size and size distribution of nanocomposites. |
