Control of nanoporous structures induced by fluorine-containing block copolymers and star-branched polymers

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The precise syntheses of the fluorine-containing block copolymers and star-branched polymers have been successfully established on the basis of living anionic polymerization techniques. Supercritical carbon dioxide processing of the obtained polymer films induced the hydro-and oleophobic film surface formation due to the highly enrichment of fluorine components at the top of film surfaces. In addition, the phase transition behavior of nano-structures was examined under supercritical carbon dioxide conditions in order to optimize the processing conditions to control the size and shape of the nanoporous structures.