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

作者：Zhou Hong; Xu Yeping; Tong Hongwu; Liu Yuxin; Han Fang; Yan Xiangyang; Liu Shaomin^*

来源：Journal of Applied Polymer Science, 2013, 128(6): 3846-3852.

DOI：10.1002/app.38598

• adsorption
• molecular recognition
• nanostructured polymers

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 mol g1, while that of nonimprinted polymers was only 314.68 mol g1. 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.

• 出版日期2013-6-15
• 单位安徽出入境检验检疫局检验检疫技术中心; 中国科学技术大学