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Grafting of molecularly imprinted polymers from the surface of Fe 3 O 4 nanoparticles containing double bond via suspension polymerization in aqueous environment: A selective sorbent for theophylline
Author(s) -
Luo Xubiao,
Deng Fang,
Luo Shenglian,
Tu Xinman,
Yang Lixia
Publication year - 2011
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.33710
Subject(s) - molecularly imprinted polymer , adsorption , precipitation polymerization , materials science , suspension polymerization , polymerization , chemical engineering , polymer , aqueous solution , polymer chemistry , nuclear chemistry , chemistry , radical polymerization , organic chemistry , selectivity , composite material , engineering , catalysis
Molecularly imprinted polymers (MIPs) were grafted from the surface of Fe 3 O 4 nanoparticles containing double bond via suspension polymerization in aqueous environment, and the leakage of Fe 3 O 4 nanoparticles from MIPs was overcome in this study. The effect of different cross‐linker on adsorption capacity of the resultant magnetic MIPs was investigated using pure trimethylolpropane trimethacrylate (TRIM) or the mixture of TRIM and divinylbenzene (DVB) as cross‐linker. Both magnetic MIPs exhibited higher adsorption capacity for the template theophylline than the corresponding non‐imprinted polymer, and Freundlich model fitted reasonably well for theophylline adsorption on both magnetic MIPs. In addition, both magnetic MIPs exhibited good recognition properties for the template theophylline versus caffeine, and the selectivity of magnetic MIPs using pure TRIM as cross‐linker (mag‐MIP‐TRIM) was much higher than those using the mixture of TRIM and DVB as cross‐linker (mag‐MIP‐TRIM and DVB). The adsorption dynamics of theophylline on both magnetic MIPs fitted well with the first‐order kinetic model, but the adsorption equilibrium on mag‐MIP‐TRIM and DVB reached faster than that on mag‐MIP‐TRIM. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011