Structure of functionalized submicron particles, prepared from 3-mercaptopropyltrimethoxysilane
Spherical silica particles were synthesized in ethanol-ammonia solutions using Stober method. They have an average diameter of 550 nm (according to SEM) and contain 3-mercaptopropyl functional groups in their surface layer. The presence of these groups is confirmed by IR spectroscopy and solid-state 13C and 29Si CP/MAS NMR spectroscopy. According to elemental analysis and TGA, the functional groups content is 7.7 mmol/g.