直接合成含長碳鏈中孔洞分子篩SBA-15及其在管柱層析之應用

Direct Synthesis of Mesoporous SBA-15 with Long Alkyl Chains and its Application on Chromatographic Columns

呂東銘(Dong-Ming Lyu)

指導教授 ： 鄭吉豐

中原大學/理學院/化學研究所/碩士(2008年)

https://doi.org/10.6840/cycu200900204

摘要

本論文旨在研究，以不同修飾方法將烷基碳鏈修飾在中孔徑分子篩SBA-15孔洞表面上，並將已修飾過的中孔徑分子篩作為靜相填充材料，探討其於HPLC分離多苯環混合物上的應用。
以後修飾法(post-synthesis)藉由微波能(Microwave energy)直接在未鍛燒中孔徑分子篩SBA-15孔洞表面修飾上含鹵素烷基碳鏈，與斷燒過後中孔徑分子篩SBA-15孔洞表面修飾上含鹵素烷基碳鏈作比較，因未鍛燒 SBA-15孔洞表面含大量Si-OH基，使我們能修飾上的鹵素烷基碳鏈數較多，應用在HPLC上我們可發現理論板數有明顯的差距。
本研究另以共縮合的方法，在一鍋反應中，成功直接鍵結不同含量、不同長碳鏈矽烷於中孔洞分子篩，由於較高比率矽烷可嫁接於中孔洞分子篩，其產物作為靜相填充材料，應用在管柱層析，可發現其分離效果和傳統後修飾法產物分離效果比較，不管在理論板數與拖尾係數都有明顯的提升。

關鍵字

管柱層析 ； 中孔洞分子篩SBA-15 ； 直接合成

並列摘要

As-synthesized and calcined SBA-15 mesoporous sieves were surface-modified with long alkylsilanes by microwave thermal heating. Optimal temperatures and time of microwave heating were studied systematically. The mesoporous SBA-15 silicas are functionalized effectively using alkylsilanes with different carbon length. SBA-15 materials surface-modified with long alkylsilanes were used as HPLC stationary phase and show better separation effect than traditional calcined SBA-15 materials surface-modified with silanes.
Silane-functionalized mesoporous silicas have been synthesized by co-condensation of variable alkylsilanes and tetraethoxysilane (TEOS) in acidic medium with the block copolymer Pluronic 123 as the structure directing agent. The influence of synthesis parameters, the molar ratio of X = silane /( silane + TEOS) was studied. SBA-15 materials surface-modified by co-condensation with long alkylsilanes were used as HPLC stationary phase show better separation effect than traditional calcined SBA-15 materials surface-modified with silanes.

並列關鍵字

Chromatographic Columns ； Direct Synthesis ； Mesoporous SBA-15

參考文獻

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