界面鋳型重合法によるアニオン鋳型樹脂の合成と分離化学的評価
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概要
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A imprinting polymerization method is useful for the preparation of functional host polymers. Anion-imprinted resins prepared by the "surface imprinting polymerization method (SIPM)", which builds an imprinted structure on the surface of a particle, were investigated. First, ferrocyanide-imprinted resins were prepared by SIPM with ferrocyanide (template) from an O/W emulsion consisting of oleylamine (functional surfactant) and divinylbenzene (matrix monomer), and were also prepared using quarternary ammonium salts for stabilizing the emulsion. This resin adsorbed ferrocyanide ion more effectively due to the imprinting operation (imprinting effects) than a non-imprinted resin (reference). From the IR spectra of ferrocyanide adsorbed on the resin, the ferrocyanide was adsorbed on a ferrocyanide-imprinted resin surface that had a more hydrophobic environment to compare with the non-imprinted resin. Second, condensed phosphate anion-imprinted resin was prepared by SIPM with oleylamine and oleylalcohol, which is a neutral auxiliary surfactant. Then, a double amount of oleylalcohol against oleylamine was suitable for preparing tripolyphosphate-imprinted resin. Because the tripolyphosphate was less adsorbed on the pyrophosphate- and phosphate-imprinted resin than the tripolyphosphate -and non-imprint resin, the selectivity to the target anion was found. Third, an organic anion-imprinted resin was also investigated. Finally, ferrocyanide-imprinted uniform microspheres (ca. 0.4μm diameter) were prepared using the pyridinium group by combining seeded emulsion polymerization method and SIPM ; they were found to adsorb ferrocyanide ion about 200-times more strongly than non-imprinted ones. Cu(II)-imprinted microspheres as well as anion-imprinted ones were prepared using the imidazole group, and those adsorbed a template more effectively than did the non-imprinted ones.
- 2005-03-05