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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >High temperature behavior of periodic mesoporous ethanesilica glasses prepared from a bridged silsesquioxane and a non-ionic triblock copolymer
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High temperature behavior of periodic mesoporous ethanesilica glasses prepared from a bridged silsesquioxane and a non-ionic triblock copolymer

机译：由桥倍半硅氧烷和非离子型三嵌段共聚物制备的周期性介孔乙烷硅玻璃的高温行为

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摘要

Periodic mesoporous organosilicas (PMOs) with 2D-hexagonal structure have been prepared by the sol-gel route in acidic conditions from a bissilylated reactive as a silica-modified source, namely 1,2-bis(triethoxysilyl)ethane (BTEE), and Pluronic(R) P123 non-ionic surfactant as a templating agent. Pyrolysis of the PMO material was performed under inert atmosphere up to 1000 degrees C in order to assess the possibility to transform the hybrid network into a porous SiOC glass network. The pyrolysis process has been mainly followed by Si-29 and C-13 solid state NMR. Thermal degradation of the pore network was followed by XRD and TEM and measured by N-2 adsorption-desorption experiments. This study shows that despite the Si-C bonds cleavage occurring after 600 degrees C causes a phase separation into silica and free carbon, an ordered structure is retained up to 1000 degrees C with a remaining specific surface area. (C) 2006 Elsevier B.V. All rights reserved.
机译：具有二维六方结构的周期性介孔有机硅（PMO）是在酸性条件下通过溶胶-凝胶法由作为硅烷改性源的双甲硅烷基化反应物，即1,2-双（三乙氧基甲硅烷基）乙烷（BTEE）和Pluronic制备的（R）P123非离子表面活性剂作为模板剂。在高达1000摄氏度的惰性气氛下进行PMO材料的热解，以评估将杂化网络转变为多孔SiOC玻璃网络的可能性。热解过程主要是Si-29和C-13固态NMR。 XRD和TEM跟踪孔网络的热降解，并通过N-2吸附-解吸实验进行测量。这项研究表明，尽管在600摄氏度后发生Si-C键断裂导致相分离成二氧化硅和游离碳，但在高达1000摄氏度的温度下仍保留了有序结构，并保留了比表面积。 （C）2006 Elsevier B.V.保留所有权利。

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