Synthesis of nanostructured polymer-titanium oxide composites through the assemgly of titanium-oxo clusters and amphiphilic block copolymers micelles

摘要

The titanium oxo-organic clusters [Ti_16O_16(OEt)_32] are used as precondensed building blocks for the sol-gel synthesis of titanium oxide nanostructures in the presence of an amphiphilic block copolymer PS-b-PMAA (PS = polystyrene blocks; PMAA = polymethacrylic acid block) as a structure directing agent. It is shown that clusters-opposite to the more reactive titanium alkoxides-can be organized and hydrolysed under controlled conditions. The resulting polymer-titanium oxide nanocomposites were characterised by TEM, SAXS, ~17O MAS NMR spectroscopy.