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New Transparent Methylsilsesquioxane Aerogels and Xerogels with Improved Mechanical Properties
Author(s) -
Kanamori K.,
Aizawa M.,
Nakanishi K.,
Hanada T.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602457
Subject(s) - methyltrimethoxysilane , aerogel , materials science , shrinkage , sol gel , chemical engineering , ambient pressure , capillary action , porosity , composite material , supercritical drying , evaporation , solvent , nanotechnology , organic chemistry , coating , engineering , chemistry , physics , thermodynamics
Transparent organic–inorganic hybrid aerogels and xerogels are prepared by using a sol–gel synthesis from a single trifunctional precursor, methyltrimethoxysilane (see figure). Obtained aerogels show a reversible shrinkage–recovery response against uniaxial compression. Aerogel‐like xerogels are successfully obtained by evaporation drying under ambient pressure because the gels recover from the temporal shrinkage caused by the capillary force of a drying solvent. Pore properties and nanotextures are well‐preserved in the resultant xerogels.