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Studies on the preparation and properties of inorganic molecularly imprinted polymer (MIP) based on tetraethoxysilane and silane coupling agents
Author(s) -
Lee SungChuan,
Lin HuiMin,
Chen Hui
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30974
Subject(s) - triethoxysilane , calcination , selectivity , ammonium hydroxide , molecularly imprinted polymer , polymer , chemistry , extraction (chemistry) , silanes , nuclear chemistry , silane , materials science , polymer chemistry , chemical engineering , chromatography , organic chemistry , catalysis , engineering
Inorganic molecularly imprinted polymer (MIP) based on tetraethoxysilane (TEOS), methyl triethoxysilane (MTEOS), and phenyl triethoxysilane (PTEOS) by sol‐gel process has been developed. The MIP's preparation conditions, H 2 O/Si molar ratios ( R ), template removal procedures, calcination temperatures, and quantity of ammonium hydroxide were investigated. The competition experiments of the MIP for template (caffeine, CAF) and analogue (theophylline, TH) were analyzed by high‐performance liquid chromatography (HPLC). The results showed that the Ad CAF decreased with an increase of the H 2 O/Si molar ratios, but the selectivity (α) increased with an increase of the H 2 O/Si molar ratios in the MIP. In addition, in a comparison of the procedures for removing the template, calcination obtained better efficiency and higher selectivity than extraction. The optimum adsorption and selectivity of MIP were obtained with R = 10 and the template was removed by calcination at 600°C. Moreover, the selectivity of the MIP (283.9) was greater than the nonimprinted polymer (2.45) under optimum preparation conditions. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009