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Synthesis of a pH/temperature bi-response gallic acid magnetic imprinted polymer for extracting natural product from Galla chinensis

  • 0College of Chemistry and Chemical Engineering, Jishou University, Hunan Jishou, 416000, China.
Journal of Chromatography. A +

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July 24, 2024

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July 24, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

A novel pH/temperature-responsive magnetic imprinted polymer was developed for gallic acid detection. This material shows high adsorption capacity and selectivity, demonstrating efficient extraction from natural sources.

Area Of Science

  • Materials Science
  • Analytical Chemistry
  • Polymer Chemistry

Background

  • Gallic acid is a valuable phenolic compound with diverse applications.
  • Efficient and selective extraction methods are crucial for isolating gallic acid from natural sources like Galla chinensis.
  • Developing stimuli-responsive materials can enhance separation and purification processes.

Purpose Of The Study

  • To synthesize and characterize a pH/temperature bi-responsive magnetic imprinted polymer (PTBG-MIP) for gallic acid.
  • To optimize the monomer-template complex ratio using Density Functional Theory (DFT).
  • To evaluate the adsorption capacity, selectivity, and application of the synthesized material.

Main Methods

  • Synthesis of Fe3O4@SiO2@KH570 carrier.
  • Preparation of PTBG-MIP using methacrylic acid (MAA), p-Vinylphenylboronic acid (p-VPBA), and N-isopropyl-acrylamide (NIPAAm).
  • Density Functional Theory (DFT) for optimizing molar ratios and predicting complex configuration.
  • Characterization of physicochemical properties (magnetization, morphology, surface distribution).
  • Adsorption experiments to determine adsorption capacity (Qe) and selection factor (α).

Main Results

  • DFT analysis predicted an optimal molar ratio of 2:1:1:1 for GA-MAA-NIPAAm-p-VPBA, aligning with experimental findings.
  • The optimized PTBG-MIP-4 exhibited significant pH- and temperature-dependent rebinding of gallic acid.
  • Maximum adsorption capacity (Qe) reached 62.26 mg g⁻¹ with a highest selection factor (α) of 5.217.
  • The material demonstrated excellent physicochemical properties and successful application in gallic acid extraction from Galla chinensis.

Conclusions

  • The synthesized PTBG-MIP is a highly efficient and selective adsorbent for gallic acid.
  • DFT is a valuable tool for optimizing imprinted polymer design.
  • The developed material shows great potential for the extraction and purification of gallic acid from natural products.

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