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Ordered macroporous quercetin molecularly imprinted polymers: Preparation, characterization, and separation

Yonggang Feng1, Qin Liu1, Lifang Ye1

  • 1School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, P.R. China.

Journal of Separation Science
|December 25, 2016
PubMed
Summary

Ordered macroporous molecularly imprinted polymers offer superior quercetin adsorption. These advanced polymers demonstrate enhanced separation capabilities from complex mixtures like Ginkgo hydrolysate.

Keywords:
gingko extractionmolecularly imprinted polymersordered macroporesquercetinsolid-phase extraction

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Analytical Chemistry

Background:

  • Molecularly imprinted polymers (MIPs) are widely used for selective separation.
  • Traditional bulk MIPs often suffer from limited binding kinetics and capacity due to inefficient mass transfer.

Purpose of the Study:

  • To develop ordered macroporous molecularly imprinted polymers (OMMIPs) for enhanced quercetin recognition and separation.
  • To compare the adsorption properties of OMMIPs with traditional bulk MIPs.

Main Methods:

  • Utilized a colloidal crystal templating method combined with molecular imprinting.
  • Employed SiO2 colloidal crystals as macropores, quercetin as the template, acrylamide as the functional monomer, and ethylene glycol dimethacrylate as the cross-linker.
  • Characterized the polymers using Scanning Electron Microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis, and evaluated adsorption kinetics and isotherms.

Main Results:

  • OMMIPs exhibited a more regular macroporous structure, narrower pore distribution, and higher porosity compared to bulk MIPs.
  • OMMIPs demonstrated a faster intraparticle mass transfer process and significantly higher adsorption capacity for quercetin.
  • OMMIPs effectively separated quercetin from Ginkgo hydrolysate in solid-phase extraction applications.

Conclusions:

  • Ordered macroporous molecularly imprinted polymers provide improved structural characteristics and adsorption performance.
  • OMMIPs offer a promising material for selective and efficient separation of target molecules like quercetin.