Multiscale Templating of Siloxane Gels via Polymerization-Induced Phase Separation

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• 作者：Kazuki Nakanishi ; Tomohiko Amatani ; Seiji Yano ; Tetsuya Kodaira
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：February 12, 2008
• 年：2008
• 卷：20
• 期：3
• 页码：1108 - 1115
• 全文大小：1852K
• 年卷期：v.20,no.3(February 12, 2008)
• ISSN：1520-5002

文摘

By combining the micellar templating in nanometer-scale with the polymerization-induced phase separation in micrometer-scale, we can synthesize monolithic silica or silsesquioxane gel materials with hierarchical well-defined macropores and shape-controlled mesopores. Depending on the mechanism of enhancing micellar-templating of siloxane oligomers, macroframeworks containing long-range-ordered cylindrical mesopores with different degrees of order have been produced. Alkylene-bridged silicon alkoxides can also be prepared into similarly hierarchical porous structures with broadened variations in framework morphology. These examples demonstrate the versatility of using phase-separation in micellar-templated gelling systems to obtain well-defined macroporous structures.