A novel molecularly imprinted polymer material for the recognition of ochratoxin A

分子印迹聚合物 材料科学 热重分析 吸附 赭曲霉毒素A 弗伦德利希方程 化学工程 有机化学 选择性 化学 食品科学 真菌毒素 工程类 催化作用
作者
Yu‐Lin Wang,Yang Yang Li,Yiling Luo,Kailian Zhou,Xiuzhen Qiu,Huishi Guo
出处
期刊:Journal of Polymer Research [Springer Science+Business Media]
卷期号:29 (5) 被引量:4
标识
DOI:10.1007/s10965-022-03005-6
摘要

A novel molecularly imprinted polymer composite material (OTA-MIPs) was prepared by the complexation between a metal–organic framework single-crystal ordered macropore ZIF-8 and a novel dummy template for the selective recognition of ochratoxin A (OTA). First, the structural analog of OTA was synthesized as a dummy template molecule. Then, OTA-MIPs were synthesized on the ZIF-8 surface by thermal polymerization. The as-synthesized OTA-MIPs were characterized by infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and N2 adsorption. The material exhibited a good network structure as well as a high specific surface area and pore size to facilitate the adsorption of target molecules. OTA-MIPs were examined for OTA re-binding properties. The Langmuir model fitted the adsorption data for OTA-MIPs better than the Freundlich model. At the same time, compared to the corresponding non-imprinted (OTA-NIPs) material, OTA-MIPs exhibited a 6.8-fold higher affinity for OTA. The molecular recognition ability of OTA-MIPs was highly specific for OTA compared to structurally similar compounds such as patulin and zearalenone. OTA-MIPs only exhibited a slight downward trend in terms of performance after five times of reuse. These results highlighted their potential for the concentration of OTA from complex food matrices.
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