| 초록 |
We developed sol-gel process to prepare mesoporous silica and organosilica materials in the presence of PLGA-PEO-PPO-PEO-PLGA pentablock copolymer templates in weakly acidic aqueous solution. Tetraethyl orthosilicate and 1,4-bis(triethoxysilyl)benzene were used as silica and organosilica precursors. Also, two kinds of pentablock copolymers with different molecular weights and volume ratios of each block were used as templates which were synthesized using Pluronic block copolymers. Iron(III) chloride hexahydrate, aluminum chloride hexahydrate and boric acid were used as acidic catalysts to combine templates and silica/organosilica precursors in aqueous solutions. We obtained the different types of mesostructures for each experimental parameters. Samples were analyzed in detail by using synchrotron small angel X-ray scattering, nitrogen sorption, transmission electron microscopy, scanning electron microscope nuclear magnetic resonance, and thermogravimetric analyzer. |
