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Molecularly imprinted polymers based on deep eutectic solvents as green functional monomers for selective removal of ibuprofen in the environment
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DOI：10.1142/S1793604726400011.png)
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Abstract
En 中文
The efficient removal and selective recognition of pharmaceutical residues from aquatic systems remains a critical challenge in green analytical chemistry. Here, we report magnetic molecularly imprinted polymers (DES-MMIPs) synthesized using a deep eutectic solvent (DES; choline chloride/methacrylic acid) as a green functional monomer for targeted adsorption and detection of ibuprofen (IBP). Vinyl-modified Fe3O4 nanoparticles serve as magnetic supports in a precipitation polymerization system. The resulting material exhibits a rough surface with well-defined imprinted cavities and sufficient magnetic responsiveness (saturation magnetization =6.29 emu & sdot;g-1). Under optimized conditions, DES-MMIPs achieve an IBP adsorption capacity of 77.68mg & sdot;g-1-1.94 times that of non-imprinted polymers, reaching equilibrium within 80min. Adsorption follows the Langmuir model (Qmax= 151.52mg & sdot;g-1) and pseudo-second-order kinetics (R2=0.9820), consistent with monolayer chemisorption. DES-MMIPs show high selectivity, maintain performance in the presence of coexisting ions and humic acid, and retain 96.6% capacity over five adsorption-desorption cycles. This work establishes a sustainable molecular imprinting platform based on DES monomers for efficient extraction and monitoring of trace organic pollutants in complex aqueous environments.
Keywords:
Ibuprofen
molecular imprinting
green functional monomer
deep eutectic solvent
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