Swelling-agent-free synthesis of siliceous and functional mesocellular foam-like mesophases by using a carboxy-terminated triblock copolymer
Swelling-agent-free synthesis of siliceous and functional mesocellular foam-like mesophases by using a carboxy-terminated triblock copolymer
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DOI：
10.1002/adfm.200701096
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发表时间：
2008-06-24
影响因子：
19
通讯作者：
Yang, Chia-Min
中科院分区：
文献类型：
--
作者：
Hsu, Yu-Chuan;Chang, Yung-Hsun;Yang, Chia-Min
我们发现，使用羧基封端的三嵌段共聚物 Pluronic P123，通过 pH 依赖性结构转变，可以无膨胀剂合成介孔泡沫 (MCF) 类二氧化硅中间相。类MCF二氧化硅材料的结构性质可以通过受控煅烧或用硫酸进行合成后处理来调节，并且已经制备出闭孔或开孔介观结构。类MCF二氧化硅中间相也被用作硬模板，通过纳米铸造途径制备类MCF碳材料。此外，已发现无溶胀剂合成对有机硅烷的存在不太敏感，并且还证明了具有羧乙基、碘丙基或巯基丙基的功能性MCF类材料的共缩合合成。
Swelling-agent-free synthesis of mesocellular foam (MCF)-like silica mesophases by a pH-dependent structural transformation using carboxy-terminated triblock copolymer Pluronic P123 has been discovered. The structural properties of the MCF-like silica materials can be modulated by controlled calcination or post-synthesis treatment with sulfuric acid, and either closed-cell or open-cell mesostructures have been prepared. The MCF-like silica mesophases have also been applied as hard templates to prepare MCF-like carbon materials via a nanocasting route. Furthermore, the swelling-agent-free synthesis has been found to be less sensitive to the presence of organosilanes, and the cocondensation syntheses of functional MCF-like materials with carboxyethyl, iodopropyl, or mercaptopropyl groups have also been demonstrated.