마이크로파를 이용한 구형하이브리드 메조포어실리카의 합성

초록

The attractive point of the hybrid mesoporous material as a separating medium is that on top of the large surface area, narrow pore size distribution of the M41S type mesoporous material, it has a large fraction of organic component, which can prove useful in controlling hydrophobicity needed for the adsorption of organic molecules. In this work, hybrid mesoporous material containing ethane groups was synthesized at various synthesis time and temperature using microwave heating to produce smaller and uniform particles with spherical morphology to apply as a reverse phase HPLC column. Particle size of these hybrid mesoporous materials could be controlled between 1.5 μm and 2.2 μm by adjusting the synthesis parameters. The synthesis time of these materials was largely reduced by microwave heating method. The materials synthesized by microwave heating was used as separation medium for HPLC and showed high separation ability compared to commercial silica, demonstrating short analysis time, relatively low inlet pressure demanded, and clear resolution of the separation. This improvement in HPLC performance of the hybrid material prepared by microwave heating is believed to be a consequence of smaller uniform particles with enlarged pores in spherical morphology induced by the rapid and uniform heating. Separation ability could be further improved by controlling the particle size of column material closely by using different heating rate.