Chinese Journal of Chromatography ›› 2019, Vol. 37 ›› Issue (5): 484-490.DOI: 10.3724/SP.J.1123.2018.11040

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Preparation of mixed-mode stationary phase for high performance liquid chromatography with ground hybrid silica monolithic material

WANG Zhaodi, ZHANG Lu, GUO Bingqian, WANG Shige, HUANG Mingxian   

  1. Department of Chemistry, College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2018-11-28 Online:2019-05-08 Published:2015-03-23
  • Supported by:

    Science and Technology Commission of Shanghai Municipality Project (No.14440502300); Foundation of Hujiang from University of Shanghai for Science and Technology (No. D15011).

Abstract:

With polyethylene glycol as a porogen, vinyltrimethoxysilane (VTMS) and tetramethoxysilane (TMOS) as silica precursors, a hybrid silica monolithic material was obtained under the catalysis of acetic acid and thermally decomposed urea. The silica monolithic material was ground by a ballmill, treated with tris(hydroxymethyl)aminomethane (Tris), then washed and dried to obtain silica particles with particle size~3 μm. The effects of different reaction conditions on the particle size, surface morphology and dispersibility of silica particles were investigated. When the volume ratio of TMOS to VTMS was 3:1, it was observed that silica particles with a pore diameter of 7.5 nm and a specific surface area of 245 m2/g were obtained. The resultant silica particles were modified by binding with chlorodimethyloctadecylsilane (C18) and by the thiol-ene click reaction to obtain a mixed-mode type stationary phase. The test results showed that the silica packing materials prepared in this work has certain applicability.

Key words: bonded stationary phase, mixed-mode stationary phase, silica monolith material, thiol-ene click reaction

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