A novel Ca2+ ion-imprinted polymer was successfully designed and synthesized. The monomer for synthesis was selected from 2-(methacryloyloxy)ethyl acetoacetate (M1), tetrahydrofurfuryl methacrylate (M2), and (4-hydroxyphenyl)methacrylamide (M3) based on theoretical and experimental analyses. Molecular modeling together with spectroscopy analyses showed the best potential properties of the M1 monomer for specific interactions with calcium ions. The synthesis was therefore performed using M1 as a functional monomer, calcium chloride dihydrate as a template, and ethylene glycol dimethacrylate as a cross-linker. The photopolymerization method in a thin layer was applied. The resulting Ca2+ ion-imprinted polymer was characterized by scanning electron microscopy, differential scanning calorimetry, thermogravimetry analysis, infrared spectroscopy, and energy-dispersive X-ray spectroscopy. The static adsorption experiment revealed a binding capacity of 0.54 mgCa g–1 and an imprinting factor of 1.5. Calcium release studies in various media were performed, indicating that the pseudo-second-order kinetics was predominant in the desorption process.
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Budnicka et al. (2024) studied this question.
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