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Showing 1–2 of 2 results
Advanced filters: Author: Sakina Miyauchi Clear advanced filters

  • Second- and third-generation hydroxy-terminated polyhedral oligomeric silsesquioxane (POSS)-core dendrons (that is, G2POSS-OH and G3POSS-OH, respectively) and third-generation carboxylic acid-terminated POSS-core dendron (G3POSS-COOH) were prepared. Casting of a methanol solution of G3POSS-OH provided optically transparent films. Methanol solution of G2POSS-OH generated opaque whitish films. Casting of a 2.6 m formic acid solution of G3POSS-COOH resulted in a highly transparent free-standing film. The peripheral functional groups may have been exposed on the surface of the cast films, which enabled control of the wettability of the films via the polarity of the COOH groups.

    • Koichi Ogi
    • Sakina Miyauchi
    • Kensuke Naka
    Research
    Polymer Journal
    Volume: 47, P: 259-266

  • Free-standing calcite thin films containing a few wt% of organic polymer were obtained through repeated cycles of layer-by-layer deposition of the vaterite particles stabilized with an octacarboxy-terminated T8-caged silsesquioxane, followed by a phase transition to calcite, after a poly(diallyldimethylammonium chloride) (PDDA) layer or a multilayer of PDDA with poly(sodium 4-styrenesulfonate) were coated on the surface of the calcite thin films. Poly(allylamine hydrochloride) and poly(acrylic acid) were also applied for preparing calcite thin films on a glass substrate.

    • Sakina Miyauchi
    • Hiroaki Imoto
    • Kensuke Naka
    Research
    Polymer Journal
    Volume: 48, P: 1019-1027