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

Abstract

The titanium oxo-organo clusters [Ti₁₆O₁₆(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 block; 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.