Preparation of modified mesoporous MCM-41 silica spheres and its application in pervaporation
Abstract(#br)Mesoporous MCM-41 silica spheres were synthesized via modified Stöber method and modified by silylation. The MCM-41 pore structures, surface properties and morphological features before and after modification were examined by XRD, SEM, TEM, FT-IR, TGA, 29 Si CP/MAS NMR and nitrogen adsorption–desorption. The results showed that the obtained MCM-41 silica had ordered mesoporous structure and spherical morphology. After silylation, the surface property of MCM-41 silica changed from hydrophilic to hydrophobic, whereas the MCM-41 framework and morphology were retained.