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Phase Separation in Alkylene-Bridged Polysilsesquioxane Sol-Gel Systems

Published online by Cambridge University Press:  01 February 2011

Kazuki Nakanishi ,
Takamitsu Yamato  and
Kazuyuki Hirao
Kazuki Nakanishi
Affiliation:
Department of Material Chemistry, Graduate School of Engineering, Kyoto University Yoshida, Sakyo-ku, Kyoto 606-8501, Japan PRESTO, Japan Science and Technology Corporation, Japan
Takamitsu Yamato
Affiliation:
Department of Material Chemistry, Graduate School of Engineering, Kyoto University Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
Kazuyuki Hirao
Affiliation:
Department of Material Chemistry, Graduate School of Engineering, Kyoto University Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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Abstract

Polymerization-induced phase separations and concurrent sol-gel transitions in the hydrolysis and polycondensation of alkylene-bridged polysilsesquioxane system resulted in the formation of co-continuous macroporous gels. Gel morphology with co-continuous macropores and micrometer-sized gel skeletons was obtained in the composition region containing much higher amount of water compared with the case with other alkyltrialkoxysilane sol-gel systems. A narrow pore size distribution and high volume fraction of macropores were obtained in the median size range from few micrometers down to 0.1μm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 726: Symposium Q – Hybrid Organic-Inorganic Materials , 2002 , Q9.7
Copyright
Copyright © Materials Research Society 2002

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