A synthetic block copolymer, poly(hydroxylated isoprene)-b-poly(2-vinyl pyridine), is shown to template the condensation of silica from tetraethylorthosilicate (TEOS) at room temperature and neutral pH. Since this block copolymer is an amphiphilic molecule, it self-assembles and functions as a surfactant to stabilize emulsions. Thus when a selective solvent for the block copolymer is used, the polymer chains arrange themselves to form various structures, depending on concentration of polymer, volume fractions of phases, etc. If TEOS is added to this solution, condensed silica mimics the self-assembled shapes. Such a templation effect has not yet been achieved at room temperature and neutral pH. Results for both silica and other ceramics are presented as well as results in the use of these structures for catalysis.

Silica condensation in emulsion stabilized by biomimetic block copolymer

244th National Meeting (2012)

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