Synthesis of molecularly imprinted polymer based on cooperative imprinting for enrichment of gallic acid in Puer tea

• Published in: Journal of applied polymer science Vol. 140; no. 14
• Main Authors: Zhang, Li‐Ping, Zhu, Fu‐Hua, Guo, Yu, Yang, Hui, Wang, Lan, He, Yi‐Fan, Li, Shu‐Jing, Li, Tian
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 10.04.2023; Wiley Subscription Services, Inc
• Subjects: Acids; Adsorption; boronate affinity; Chemical synthesis; cooperative imprinting; Enrichment; Fourier transforms; Gallic acid; Hydrogen bonds; Imprinted polymers; Infrared spectra; Materials science; Methacrylic acid; molecularly imprinted polymer; Polymers; Recognition; Selectivity
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.53712

The molecularly imprinted polymer (MIP) for gallic acid (GA) was prepared based on the cooperative imprinting of boronate affinity interactions and hydrogen bond. The fabricated MIP were designed by the polymerization of template with co‐functional monomer, 3‐acrylamidophenylboronic acid (AAPBA) and methacrylic acid (MAA). The characteristics of the resulting polymer (AAPBA‐co‐MAA MIP) were tested by scanning electron microscope (SEM), Fourier transform infrared spectra (FTIR) and nitrogen adsorption–desorption. Bonding performance demonstrated that the AAPBA‐co‐MAA MIP possessed the excellent recognition ability in the incubation solution with pH 7.4 and presented higher adsorption capacity, faster adsorption rate and satisfactory selectivity for GA. Additionally, the AAPBA‐co‐MAA MIP revealed the good applications in the separation and enrichment of GA from Puer tea, and the amount of GA enriched by them was determined to be 2.75 mg g−1. This work suggested that the integration of cooperative imprinting strategy between covalent and non‐covalent would be an effective way to improve the specific recognition performance of the MIP. A novel MIP based on the cooperative imprinting of boronate affinity interactions and noncovalent interactions was proposed. The obtained polymer (AAPBA‐co‐MAA MIP) presented higher adsorption capacity, faster adsorption rate and satisfactory selectivity toward the template. The AAPBA‐co‐MAA MIP revealed the good application in the separation and enrichment of gallic acid from Puer tea.