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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/6494


    Title: 具羧酸及胺基之中孔洞材料的合成與鑑定;Synthesis and Characterization of Mesoporous Silicas with Carboxylic and Amine Functionality
    Authors: 蔡忠達;Chung-Ta Tsai
    Contributors: 化學研究所
    Keywords: 中孔洞;羧酸;胺基;mesoporous;carboxylic;amine
    Date: 2009-07-03
    Issue Date: 2009-09-22 10:20:30 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本篇研究主要是以 CES (Carboxyethylsilanetriol sodium salt) 與 TEOS (Tetraethyl orthosilicate) 為共同矽源,使用 P123 (Pluronic 123) 作為模板試劑,在反應溫度為 313 K 下直接合成具有羧酸官能基的中孔洞材料 SBA-15 ,之後使用 H2SO4 / H2O 溶劑在高溫下裂解界面活性劑 P123 ,藉由儀器鑑定可發現樣品在移除模板後,仍然可以得到具有 SBA-15 特性的中孔洞材料。經過合成與鑑定步驟,可知羧酸官能基化的中孔洞材料 SBA-15 ,其 CES 的含量可高達 60 %,同時對於中孔洞六角柱狀結構不會造成相轉變或是結構破壞,而表面積、孔洞體積以及孔洞直徑也均會隨著 CES 含量的增加而遞減。 在另一部份則是使用 TMOS (Tetramethyl orthosilicate) 、 CNTES (3-(Triethoxysilyl)-Propionitrile) 及APTMS ((3- Aminopropyl)-trimethoxysilane)為共同矽源,以 C16TEABr (Cetyltrietylammonium bromide) 作為模板試劑,在酸性條件下透過直接合成法合成同時含有羧酸及胺基官能基的中孔洞材料 SBA-1,實驗條件中藉由改變不同的酸量、不同的水熱時間、不同的矽源以及不同的反應溫度,探討對於合成具有羧酸及胺基雙官能基的 SBA-1 的影響。 Well-ordered mesoporous silicas SBA-15 functionalized with extremely high loadings of pendant carboxylic acid groups, up to 50 mol% of the silicon sites without degradation of ordered structures, have been successfully synthesized via co-condensation of tetraethoxysilane (TEOS) and carboxyethylsilanetriol sodium salt (CES) templated with a triblock polymer Pluronic P123 under acidic conditions. On the other hand, well-ordered cubic mesoporous silicas SBA-1 functionalized with carboxylic and amino functional groups have been successfully synthesized via the co-condensation of 3-(Triethoxysilyl)-Propionitrile (CNTES) , tetramethoxysilane (TMOS) and (3-Aminopropyl)-trimethoxysilane (APTMS) templated by cetyltriethylammonium bromide (CTEABr) under strongly acidic conditions. In order to optimize the degree of the structural ordering of the bifunctional mesoporous silicas SBA-1, a wide range of synthesis conditions such as synthesis temperature, loading of functional groups, hydrothermal periods, and acid concentrations was systematically investigated. The materials obtained were characterized by a variety of techniques including powder X-ray diffraction (XRD), nitrogen sorption measurements , 13C and 29Si magic angle spinning (MAS), IR, transmission electron microscope (TEM) and thermogravimetric analysis (TGA).
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