綠色技術合成奈米孔洞材料SBA-15及此材料在層析管柱之應用

Green technology synthesis of SBA-15 nanoporous material and its application in chromatographic column

陳俊霖(Chun-Lin Chen)

指導教授 ： 鄭吉豐

中原大學/理學院/化學研究所/碩士(2007年)

https://doi.org/10.6840/cycu200700852

摘要

SBA-15中孔徑分子篩使用可在自然界中自然分解的三區塊共聚合物( triblock copolymer )作為模板，在酸性環境下可合成出材料穩定性極佳且結構為六角排列（hexagonal）的SBA-15中孔徑分子篩。然而，在SBA-15中孔徑分子篩合成完畢後，原本含有界面活性劑之酸溶液(母溶液)在過濾之後一般來說都捨棄掉，對環境與製造成本都會造成負擔。本實驗探討經由攪拌回收之母溶液，不添加界面活性劑或補充部份界面活性劑，直接合成出SBA-15中孔洞分子篩的可行性。經由X射線粉末繞射儀(Powder X-ray Diffraction ; PXRD )、氮氣等溫吸附/脫附儀 (N2 adsorption/desorption ; BET )、固態核磁共振儀(Solid-state NMR)鑑定結果顯示，此一方法可以節省50%界面活性劑，並可以回收利用濾液達三次，所合成出的分子篩仍具有一定規則的孔洞排列，並且保有相當高的表面積與孔洞體積，顯示回收濾液的可行性，減少酸液HCl與界面活性劑P123的使用，除了降低原料成本，並可減少對環境的汙染。
其次探討以微波能(Microwave energy)在中孔徑分子篩SBA-15孔洞表面修飾上烷基碳鏈，找出微波修飾之最佳條件。並使用較為便宜醇類作為修飾的材料，取代傳統使用昂貴的矽烷修飾劑，修飾後產物作為靜相填充材料，探討其於HPLC分離多苯環混合物上的應用。

關鍵字

中孔俓分子篩 ； 層析 ； 綠色化學

並列摘要

Mesoporous molecular sieves SBA-15 were synthesized using triblock-copolymer P123 as a template. Mother solution was discarded after syntheses of materials. Eventually, the acid and surfactant residues pollute our environment. In this study, the mother solution containing acid and surfactant was using again to prepare SBA-15. During the synthesis, partial surfactant is replenished for preparing SBA-15 with well meso-structured. The technique is coined “green technology for preparing mesoporous molecular sieves”. Resultant products own better pore volume and surface area. This technique can use lower amount of acid and surfactant than traditional syntheses. Thus this method save the cost for preparing products; moreover, it is more environmentally friendly.
As-synthesized and calcined SBA-15 mesoporous sieves were surface-modified with cheap alkylalcohols by microwave thermal heating. Optimal temperatures and time of microwave heating were studied systematically. SBA-15 materials surface-modified with alkylalcohol were used as HPLC stationary phase show better separation effect than traditional calcined SBA-15 materials surface-modified with silane.

並列關鍵字

chromatography ； green chemistry ； mesoporous

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