| 酸诱导介观相转变硅基介孔材料的合成机理及其改性 |
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| 引用本文： | 金政伟,汪晓东.酸诱导介观相转变硅基介孔材料的合成机理及其改性[J].物理化学学报,2008,24(8):1519-1523. |
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| 作者姓名： | 金政伟 汪晓东 |
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| 作者单位： | School of Packaging and Printing Engineering, Tianjin University of Science and Technology, Tianjin 300222, P. R. China; School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China |
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| 基金项目： | 天津科技大学校科研和教改项目
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国家自然科学基金
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| 摘 要： | 采用两步法以三嵌段共聚物P104(PEO27-PPO61-PEO27)为模板剂合成介孔材料, 研究了介孔材料结构随体系pH 值的变化, 探讨了体系中介观相转变的机理. 研究表明,随着pH 的升高, 发现体系中无机物种和模板剂所组成的介观相发生了转变,由P6mm 的SBA-15(pH=1.51-2.67)2D六角孔道结构转变为3D 蠕虫状孔道的MSU-X(pH=3.93-4.56)结构. 对所得的两种不同种类的硅基材料以γ-胺丙基三乙氧基硅烷(APTES: NH2(CH2)3Si(C2H5O)3)进行表面烷基化改性结果表明, 在同样的条件下, 经过改性后MSU-X类介孔材料孔壁上接枝的烷基数目要远超过SBA-15 类介孔材料.
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| 关 键 词： | 硅基介孔材料 酸诱导 介观相转变 表面改性 |
| 收稿时间： | 2008-02-21 |
| 修稿时间： | 2008-04-14 |
Mechanism of Acidity-Induced Mesostructure Transformation for Highly Ordered Mesoporous Silica Materials and Their Functionalizations |
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| JIN Zheng-Wei,WANG Xiao-Dong.Mechanism of Acidity-Induced Mesostructure Transformation for Highly Ordered Mesoporous Silica Materials and Their Functionalizations[J].Acta Physico-Chimica Sinica,2008,24(8):1519-1523. |
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| Authors: | JIN Zheng-Wei WANG Xiao-Dong |
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| Institution: | School of Packaging and Printing Engineering, Tianjin University of Science and Technology, Tianjin 300222, P. R. China; School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China |
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| Abstract: | Highly ordered mesoporous silica materials were synthesized by templating with a nonionic triblock copolymer (Pluronic P104(PEO27-PPO61-PEO27)) via a two-step pathway in mildly acidic conditions. The mechanism of this transformation was also investigated. It was found that a mesostructure transformation could be induced by adjusting acidity from the SBA-15 type 2-dimentional hexagonal channel mesostructure (pH=1.51-2.67) to the MSU-X type with 3-dimentional worm-like mesostructure (pH=3.93-4.56) in the same synthetic system. After modified by γ-(aminopropyl) triethoxysilane (APTES) under the same condition, it was indicated that the MSU-X type was more easily modified by APTES than SBA-15 type. |
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| Keywords: | Mesoporous silica material Acidity-induced Mesostructure transformation Surface modification |
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