Synthesis and characterization of bisphenol-A imprinted polymer as a selective recognition receptor

[Display omitted] ► The binding affinity of BPA-MIP high affinity sites is very resilient. ► A low volatile solvent and a non-reactive linear polymer are a good porogen system. ► Selectivity recognition is achieved for aqueous samples. ► The limiting step of the adsorption process is carried out in...

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Bibliographic Details
Published in:Analytica chimica acta 2011-11, Vol.706 (2), p.275-284
Main Authors: Cela-Pérez, M.C., Castro-López, M.M., Lasagabáster-Latorre, A., López-Vilariño, J.M., González-Rodríguez, M.V., Barral-Losada, L.F.
Format: Article
Language:English
Subjects:
Adsorption
Affinity distribution
Analysis methods
Analytical chemistry
Applied sciences
Bisphenol-A
Character recognition
Chemisorption
Chemistry
Diffusion
Exact sciences and technology
General, instrumentation
Imprinted polymers
Kinetics
Mathematical models
Molecularly imprinted polymer
Natural water pollution
Pollution
Polymerization
Selectivity
Water treatment and pollution
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Summary:[Display omitted] ► The binding affinity of BPA-MIP high affinity sites is very resilient. ► A low volatile solvent and a non-reactive linear polymer are a good porogen system. ► Selectivity recognition is achieved for aqueous samples. ► The limiting step of the adsorption process is carried out in the imprinted cavities. ► The adsorption capacity is kept when the sorbent is regenerated. 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.
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2011.09.002