Evaluation of deep eutectic solvent as a new monomer for molecularly imprinted polymers for removal of bisphenol A

• Published in: Journal of polymer research 2023-06, Vol.30 (6), Article 205
• Main Authors: Shah, Syed Asim Hussain, Asman, Saliza
• Format: Article
• Language: English
• Subjects: Adsorption; Analysis; Benzoyl peroxide; Bisphenol A; Bulk polymerization; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Choline; Ethylene glycol; Free radical polymerization; Free radicals; Imprinted polymers; Industrial Chemistry/Chemical Engineering; Isotherms; Methacrylic acid; Monomers; Optimization; Original Paper; Phenols; Polymer industry; Polymer Sciences; Polymerization; Polymers; Solvents; Synthesis; Thermal properties; Thermodynamics
• ISSN: 1022-9760; 1572-8935
• DOI: 10.1007/s10965-023-03581-1

Deep eutectic solvent molecularly imprinted polymer (DES-MIP) was synthesized by bulk polymerization via free radical polymerization using bisphenol A (BPA) as a template, DES as a functional monomer, ethylene glycol dimethyl acrylate (EGDMA) as a crosslinker and benzoyl peroxide as initiator. DES functional monomer was prepared by the combination of choline chloride methacrylic acid (ChCl-MAA). The synthesized DES-MIP was then compared with conventional molecularly imprinted polymer (MIP) synthesized using methacrylic acid (MAA) as a functional monomer. The DES-MIP has a higher selectivity for BPA (17.72 mg/g) than competing chemicals, including bisphenol AP (9.78 mg/g), 2-naphthol (8.25), and 4-tertiary butyl-phenol (6.98 mg/g). The optimization parameters include the effects of pH, adsorption kinetics, adsorption isotherm, and thermodynamic studies were investigated. DES-MIP showed the highest binding capacity at pH 7. The kinetic and isotherm studies demonstrated good agreement with a pseudo-second-order kinetic model and Langmuir isotherm models, respectively. The thermodynamic study proved that the adsorption of BPA on DES-MIP was exothermic and spontaneous with ΔH 0 (-23.734 × kJ/mol) and ΔG 0 (-2.929 kJ/mol − ). Reusability experiments show that the DES-MIP can be recycled five times without significantly diminishing its adsorption capacity. As a result, it proved that the contribution of DES as a functional monomer alternative in MIP synthesis considerably improved the recognition of BPA adsorption.