Synthesis of Silica Hollow Nanoparticles Templated by Polymeric Micelle with Core−Shell−Corona Structure

摘要: The micelle of an ABC triblock copolymer having a core−shell−corona architecture was used as template for the fabrication hollow silica nanosphere. Silica deposited on poly(styrene-b-2-vinyl pyridine-b-ethylene oxide) (PS−PVP−PEO) by sol−gel method. At pH 4, PVP block PS−PVP−PEO acts acid catalyst site hydrolysis tetramethoxysilane (TMOS), while PEO shows weak interaction with silanol groups inorganic polymer. Therefore, networks were mostly grown in comparison to block. Hollow has almost same diameter that PS core neat micelle, and thickness shell wall can be controlled changing relative concentration TMOS respect length micelle.