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Preparation and characterization of mesoporous materials based on silsesquioxane by block copolymer templating
Author(s) -
Park ByeongGyu,
Jo NamJu,
Cho WonJei,
Ha ChangSik
Publication year - 2002
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.871
Subject(s) - silsesquioxane , tetraethyl orthosilicate , silanol , copolymer , materials science , nanoporous , thermogravimetric analysis , mesoporous material , chemical engineering , alkoxy group , polymer chemistry , orthosilicate , small angle x ray scattering , organic chemistry , nanotechnology , chemistry , polymer , composite material , catalysis , scattering , alkyl , physics , optics , engineering
Nanoporous materials were prepared by using silsesquioxane containing three alkoxy groups and a non‐hydrolysable organic moiety. The influences of pH and precursor ratios of silsesquioxane and tetraethyl orthosilicate (TEOS) on the preparation of organo‐modified periodic mesoporous materials were investigated. These materials were characterized using small angle X‐ray scattering, infrared spectroscopy and thermogravimetric analysis. A non‐ionic triblock copolymer was used as a structure‐directing agent to provide large pores with a high density of silanol groups. It was found that silsesquioxanes could form ordered nanoporous materials in the presence of TEOS by controlling the pH and the co‐precursors ratio, despite their structural irregularity. © 2002 Society of Chemical Industry