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Nonsupercritical synthesis of microporous gels
Author(s) -
Pollini M.,
Sannino A.,
Maffezzoli A.,
Licciulli A.,
Nicolais L.
Publication year - 2008
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/app.28588
Subject(s) - microporous material , materials science , supercritical fluid , porosity , chemical engineering , photopolymer , supercritical drying , aerogel , rheology , polymer chemistry , composite material , polymer , organic chemistry , chemistry , polymerization , engineering
In this work, the development of microporous gels using a novel degradation process not involving supercritical fluids is proposed. Photosensitive organic–inorganic hybrid sols in an alcoholic solution based on TEOS and an organic modified alcoxysilane were gelled by photopolymerization, and then dried at ambient pressure before sintering at 550°C. The result was a microporous gel with porosity higher than 90%. Chemical, physical, thermal, and mechanical characterizations were carried out on the microporous gel obtained by the nonsupercritical drying procedure. These results demonstrated the physical properties comparable with those of aerogels obtained by supercritical drying can be obtained. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008