| 초록 |
Mesoporous silica and organosilica powder samples were prepared with di-, tri- and pentablock copolymers in acidic aqueous solutions. Block copolymers were synthesized with combination of poly(ethylene oxide), poly(lactic acid-co-glycolic acid), and Pluronic PEO-PPO-PEO triblock copolymers via step-growth polymerization. Generally, poly(ethylene oxide) block in block copolymers supports chemical interaction between its polar oxygen atom and hydroxyl group of hydrolysed silica precursors as well as sol-gel reaction between silica precursors within boundary of PEO corona chains in aqueous solution. It was found that structure of block copolymer template can be varied during sol-gel reaction to get different pore structure and particle shape. Mesoporous materials templated from various block copolymers were characterized with various analysis method to compare physicochemical nanoporous structures. Also, structural stability will be discussed for versatile applications. |
