Abstract
The B3LYP/6-31G(d,p) level was performed to simulated the formaldehyde (HCHO), a molecularly imprinted self-assembly system with acrylamide (AM) as the functional monomer. HCHO–molecularly imprinted polymers (MIPs) were prepared using thermally initiated precipitation polymerisation based on the calculation results. The adsorption, selectivity and stability of HCHO–MIPs were characterised and analysed. The results revealed that the complex with an orderly arrangement of HCHO and AM had the lowest configurational energy (−109.51 kJ/mol) when the ratio of HCHO and AM was 1:4, and the cross-linking agent was pentaerythritol triacrylate. HCHO–MIPS prepared using HCHO, AM and PETA in the ratio of 1:4:16 had the best imprinting effect under certain conditions: 289-K temperature, 400-mg/L HCHO solution concentration, and 400-min absorption time. The maximum clear adsorption capacity and dissociation-equilibrium constants were 54.67 mg/g and 72.46 mg/L, respectively. The pseudo-second-order kinetic equation was used to fit the adsorption capacity. Thermodynamic studies showed that the adsorption of HCHO by HCHO–MIPs was an exothermic process. The selectivity study showed that the adsorption capacity of HCHO–MIPs for HCHO was higher than that of benzaldehyde, propionaldehyde and glyoxylic acid, showing a strong specific adsorption capacity. The HCHO–MIPs prepared using this synthetic strategy exhibited better adsorption, selectivity and stability.
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The Science and Technology Development Planning of Jilin Province (20200201202JC) is gratefully acknowledged.
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The Science and Technology Development Planning of Jilin Province (20200201202JC).
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Junbo Liu: Conceived and designed the experiments, Funding acquisition. Wensi Zhao: Performed the experiments, Writing—original draft. Hanqi Chang: Analyzed the data. Dadong Liang: Analyzed the data. Shanshan Tang: Conceived and designed the experiments, Writing—original draft. Ruifa Jin: Provided the software.
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Liu, Jb., Chang, H., Zhao, W. et al. Theoretical design and preparation of molecularly imprinted polymers of formaldehyde and acrylamide. J Polym Res 28, 433 (2021). https://doi.org/10.1007/s10965-021-02724-6
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DOI: https://doi.org/10.1007/s10965-021-02724-6