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Poly(N‐isopropylacrylamide)‐grafted silica as a support of platinum colloids: Preparation method, characterization, and catalytic properties in hydrogenation
Author(s) -
Suzuki Kazuya,
Yumura Takeshi,
Mizuguchi Masaaki,
Tanaka Yuko,
Chen ChunWei,
Akashi Mitsuru
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20000919)77:12<2678::aid-app150>3.0.co;2-9
Subject(s) - comonomer , thermogravimetric analysis , poly(n isopropylacrylamide) , silane , polymer chemistry , materials science , colloidal silica , catalysis , grafting , chemical engineering , polymerization , radical polymerization , chemistry , organic chemistry , copolymer , nanotechnology , polymer , composite material , coating , engineering
We investigated the composition, properties, and utility of a novel hybrid material of poly(N‐isopropylacrylamide)‐grafted silica. The modified silica was prepared in two steps: (1) grafting silane layers of active precursors, such as initiator, transfer agent or comonomer onto the silica surface by solution deposition and (2) radical polymerization of N‐isopropylacrylamide (NIPAAm) on the grafted silane layers. Thermogravimetric analysis (TGA), elemental analysis (EA), FTIR spectroscopy, and TEM were used to characterize the layer composition, structure, and chemistry, respectively. Well‐dispersed platinum colloids have been prepared on the PNIPAAm‐grafted silica via the reduction of PtCl 2− 6by ethanol. The immobilized Pt colloids were found to be active and stable heterogeneous catalysts for the hydrogenation of ally alcohol in ethanol. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2678–2684, 2000