Direct synthesis of surface molecularly imprinted polymers based on vinyl-SiO2 nanospheres for recognition of bisphenol A

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机构：

[1] Zhou, Hong

[2] Xu, Yeping

[3] Tong, Hongwu

[4] Liu, Yuxin

[5] Han, Fang

[6] Yan, Xiangyang

[7] Liu, Shaomin

来源：

Liu, Shaomin | 1600年 / John Wiley and Sons Inc, Postfach 10 11 61, 69451 Weinheim, Boschstrabe 12, 69469 Weinheim, Deutschland, 69469, Germany卷 / 128期

关键词：

Molecularly imprinted polymers (MIP) with high performance in selectively recognizing bisphenol A (BPA) were prepared by using a novel and facile surface molecular-imprinting technique. Vinyl-functionalized; monodispersed silica spheres were synthesized by a one-step emulsion reaction in aqueous solution. Then; BPA surface molecularly imprinted polymers (SMIP) were prepared by polymerization with 4-vinylpyridine as the functional monomer and ethylene glycol dimethacrylate as the crosslinker. Maximal sorption capacity (Qmax) of the resulting SMIP was up to 600 μmol g-1; while that of nonimprinted polymers was only 314.68 μmol g-1. Kinetic binding study showed that sorption capacity reached 70% of Qmax in 20 min and sorption equilibrium at 80 min. SMIP had excellent accessibility and affinity toward BPA; for the selectivity coefficients of SMIP for BPA in respect to phenol; p-tert-butylphenol; and o-phenylphenol were 3.39; 3.35; and; 3.02; respectively. The reusage process verified the SMIP owning admirably stable adsorption capacity toward BPA for eight times. © 2012 Wiley Periodicals; Inc;

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Journal article (JA)

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