| 초록 |
The surface property of colloidal nanosilica(SiO2) nanospheres is regulated by modification with organoalkoxysilane, such as mercapto propyl trimethoxysilane (MPTMS), 3-aminopropyl trimethoxysilane (APTMS), phenyl trimethoxysilane(PTMS), 3-(phenylamino) propyltrimethoxysilane(PAPTMS). The surface of silica is hydrophilic due to the abundance of silanol groups, resulting in poor utility in organic solvent. The degree of surface modification can be controlled by adjusting the pH, H2O/Si molar ratio, reaction temperature. The highly monodispersed nanosilica were obtained in organic solvent after surface modification. The property and morphology of nanosilica were characterized by dynamic light scattering(DLS), near infrared spectroscopy(NIR), 29Si-nuclear magnetic resonance(Si-NMR). |
