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Chemistry and Industry of Forest Products ›› 2023, Vol. 43 ›› Issue (4): 53-59.doi: 10.3969/j.issn.0253-2417.2023.04.008

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Preparation of Magnetic Molecularly Imprinted Polymers and Its Adsorption Properties for 1, 2, 3, 4, 6-Pentagalloylglucose

Lihua TANG1(), Qinhao GUAN1, Liangliang ZHANG2, Man XU1, Linlin YAN1,*()   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China
    2. Advanced Carbon Conversion Technology Research Institute, Huaqiao University, Xiamen 361021, China
  • Received:2022-07-31 Online:2023-08-28 Published:2023-08-26
  • Contact: Linlin YAN E-mail:tanglihua@163.com;yanlinlin155@163.com

Abstract:

The magnetic molecularly imprinted polymers(MIPS) and magnetic non-imprinted polymers(NIPS, without PGG) were prepared by precipitation polymerization using Fe3O4 magnetic nanoparticles as carriers, 1, 2, 3, 4, 6-penta-galloyl glucose(PGG) as template molecule and acrylamide (AM) as functional monomer. Their morphology and structure were characterized, and the adsorption performance was investigated. The results of SEM, TEM, FT-IR, and XRD showed that MIPS was spherical nanoparticle with Fe3O4 as the core and SiO2 as the outer layer, with densely packed pores on the surface. The analysis of magnetic properties shows that MIPS has good paramagnetism and can be separated under applied magnetic field. The results show that the adsorption capacity of MIPS for PGG is obviously stronger than that of NIPS.The adsorption process of PGG by MIPS was fitted well with the Langmuir adsorption isotherm model, with a maximum adsorption capacity of 67.02 mg/g. The adsorption process of PGG by MIPS was very consistent with the second-order kinetic model. In the reuse performance experiment of MIPS, the adsorption capacity of the fifth cycle 53.16 mg/g, could still reach 83.78% of the first adsorption capacity. This indicated that the reuse performance of MIPS was better and could achieve specific adsorption of PGG.

Key words: molecular imprinted polymer, 1, 2, 3, 4, 6-pentagalloglucose, polyphenols, Fe3O4

CLC Number: