| 18395733 |
Zhong H, Zhu G, Wang P, Liu J, Yang J, Yang Q: Direct synthesis of hierarchical monolithic silica for high performance liquid chromatography. J Chromatogr A. 2008 May 9;1190(1-2):232-40. Epub 2008 Mar 21.
The silica-based monolith exhibiting a hierarchical bimodal porous structure has been directly synthesized via lytropic mesophase. The hydrolysis and condensation of tetramethoxysilane (TMOS) in the presence of poly (ethylene oxide)-block-poly (propylene oxide)-block-poly (ethylene oxide) (P123) and acetic acid results in silica monolith with MSU-type mesoporous structure embedded in the skeleton of the interconnected macropore. The silica monolith with bimodal porous structure can separate benzene and phenol with high flow rate and low back-pressure. Moreover, the chromatographic property of C18-grafted silica monolith is investigated in the separation of aromatic molecules. Our primary result shows that the silica monolith with interconnected macropore and MSU-type mesopore is a promising packing material as stationary phase for high performance liquid chromatography. |
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