Zhong Hua, Zhu Guiru, Wang Peiyuan, Liu Jian, Yang Jie, Yang Qihua
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
J Chromatogr A. 2008 May 9;1190(1-2):232-40. doi: 10.1016/j.chroma.2008.03.045. 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.
通过溶致液晶中间相直接合成了具有分级双峰多孔结构的二氧化硅整体柱。在聚环氧乙烷-嵌段-聚环氧丙烷-嵌段-聚环氧乙烷（P123）和乙酸存在下，四甲氧基硅烷（TMOS）的水解和缩合产生了具有MSU型介孔结构的二氧化硅整体柱，该结构嵌入在相互连接的大孔骨架中。具有双峰多孔结构的二氧化硅整体柱能够以高流速和低背压分离苯和苯酚。此外，还研究了C18接枝二氧化硅整体柱在芳香族分子分离中的色谱性能。我们的初步结果表明，具有相互连接的大孔和MSU型介孔的二氧化硅整体柱是一种很有前景的作为高效液相色谱固定相的填充材料。
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