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Reference type: Journal
Authors: Cela-Pérez MC, Castro-López MM, Lasagabáster-Latorre A, López-Vilariño JM, González-Rodríguez MV, Barral-Losada LF
Article Title: Synthesis and characterization of bisphenol-A imprinted polymer as a selective recognition receptor.
Publication date: 2011
Journal: Analytica Chimica Acta
Volume: 706
Issue: (2)
Page numbers: 275-284.
DOI: 10.1016/j.aca.2011.09.002
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0003267011012104

Abstract: Molecularly imprinted polymers (MIPs) are currently used to provide selectivity in chemical sensors. In this context, a non-covalent bisphenol-A (BPA)-imprinted polymer using 4-vinylpyridine (4-Vpy) as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as crosslinker and a low volatile solvent, triethylene glycol dimethyl ether (TRIGLYME), in combination with a non-reactive linear polymer, poly (vinyl acetate) (PVAc), as porogen, was synthesized with a simple polymerization procedure. Batch rebinding experiments were carried out to evaluate the binding and selectivity properties of the BPA-MIP. The experimental adsorption isotherms were fitted and a heterogeneous distribution of the binding sites was found. The selectivity of MIP demonstrated higher affinity for target BPA and BPA-analogues over other common water pollutants. The adsorption kinetics followed the pseudo-second-order kinetic model so that the specific adsorption in the imprinted cavities by two strong hydrogen bonds could be described as a chemisorption process. The diffusion mechanism was determined by the intra-particle diffusion and Boyd models, both of them revealing that the adsorption was mainly governed by intra-particle diffusion. MIP was shown to be promising for regeneration without significant loss in adsorption capacity
Template and target information: bisphenol A, BPA
Author keywords: molecularly imprinted polymer, bisphenol-A, affinity distribution, kinetics, adsorption


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