Synthesis of molecularly imprinted polymer by suspension polymerization for selective extraction of p ‐hydroxybenzoic acid from water

作者：Xiaojuan Liu, Fengjing Wu, Chak‐Tong Au, Qi Yu Tao, Mingyu Pi, Wenhui Zhang · 发表于：Journal of Applied Polymer Science · 年份：2018 · DOI：10.1002/app.46984 · 被引用次数：47 · 研究领域：Analytical chemistry methods development、Radioactive element chemistry and processing

ABSTRACT Molecularly imprinted polymer (MIP) for selective extraction of p ‐hydroxybenzoic acid ( p ‐HB) was synthesized by suspension polymerization using p ‐HB as template, 4‐vinyl pyridine as functional monomer and ethylene glycol dimethacrylate as crosslinker. As characterized by scanning electron microscopy, the MIP particles are spherical, with size ranging from 1 to 8 μm. Compared with the non‐imprinted polymer (NIP), the MIP shows higher binding capacity toward p ‐HB: maximum binding capacity for p ‐HB being 8.07 μmol g −1 over MIP and 3.88 μmol g −1 over NIP. The adsorption of p ‐HB on MIP follows the Freundlich model and displays pseudo‐second‐order kinetics. The results of selective and competitive binding experiments confirm that the molecularly imprinted sites have excellent recognition ability toward p ‐HB. The results reveal that the MIP is a promising adsorbent for selective extraction of p ‐HB from water samples. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46984.