Preparation and catalytic use of silica-polymer core-shell microspheres with imidazolium-styrene copolymer shells

Yudai Yamada, Kun Kyo, Quanxi Bao, Daisuke Tomida, Daisuke Nagao, Mikio Konno, Chiaki Yokoyama

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Silica-polymer core-shell microspheres with imidazolium-styrene copolymer shells were prepared by polymerization of acidic ionic liquids with styrene in the presence of 3-mercaptopropyltrimethoxysilane (MPTMS)-modified silica, in water-ethanol mixed solvent. It was found that the thickness of the copolymer shells and the amounts of ionic liquids contained in the shells depended largely on reaction parameters such as the emulsifier, and the type and mole fraction of acidic ionic liquid. Unlike the neat imidazolium-styrene copolymers, the silica-polymer core-shell microspheres were insoluble in organic solvents. Moreover, they retained the properties of the imidazolium-styrene copolymers while affording improved mechanical strength due to their core-shell structure. The core-shell microspheres can be used as efficient catalysts for acetalization of carbonyl compounds with methanol under mild reaction conditions.

本文言語English
ページ(範囲)227-231
ページ数5
ジャーナルCatalysis Communications
11
4
DOI
出版ステータスPublished - 2009 12 15

ASJC Scopus subject areas

  • 触媒
  • 化学 (全般)
  • プロセス化学およびプロセス工学

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