Engineering Research Center of Bio-Process of Ministry of Education, School of Food and Biological Engineering, Hefei University of Technology, Hefei, People's Republic of China.
J Mol Model. 2020 Jul 6;26(8):198. doi: 10.1007/s00894-020-04460-y.
In this study, the preparation of molecularly imprinted polymers for bilobalide (BBMIPs) was successfully achieved by bulk polymerization with methacrylamide (MAM), trimethylolpropane triacrylate (TMPTA), and acetonitrile (ACN) as functional monomer, cross-linker, and solvent, respectively. After Gaussian software simulation and single factor experiments, the prepared MIPs with a molar ratio of 1:4:15 for BB-MAM-TMPTA were systematically characterized. The hydrogen bonding interaction between BB and MAM was confirmed by a combination of FTIR and NMR analysis. Thermal gravimetric analysis results displayed that MIPs have excellent thermal stability under high temperature. Additionally, the average pore size and surface area of MIPs were found to be higher than those of NIPs through nitrogen adsorption results. The results of static adsorption and kinetic adsorption suggested that the adsorption equilibrium concentration was 0.6 mg/mL and the equilibrium time was 5 h, and the Langmuir and pseudo-second-order kinetic models were proven to fit with static and kinetic adsorption behaviors, respectively. Meanwhile, the selective adsorption study revealed that MIPs show high adsorption and great selectivity towards BB in comparison with other substances having similarly structure. MIPs also possessed a good performance on reusability, maintaining a high recovery rate after being reused 5 times. The application experiment further indicated that MIPs can effectively separate BB from low purity samples. Therefore, the prepared MIPs had a great potential for BB separation.
在这项研究中，通过本体聚合成功制备了双氢青蒿素（BBMIPs）的分子印迹聚合物，功能单体、交联剂和溶剂分别为丙烯酰胺（MAM）、三羟甲基丙烷三丙烯酸酯（TMPTA）和乙腈（ACN）。通过高斯软件模拟和单因素实验，对摩尔比为 1:4:15 的 BB-MAM-TMPTA 制备的 MIPs 进行了系统表征。通过傅里叶变换红外光谱（FTIR）和核磁共振（NMR）分析证实了 BB 与 MAM 之间的氢键相互作用。热重分析（TGA）结果表明，MIPs 在高温下具有优异的热稳定性。此外，通过氮气吸附结果发现，MIPs 的平均孔径和比表面积均高于非印迹聚合物（NIPs）。静态吸附和动力学吸附结果表明，吸附平衡浓度为 0.6mg/mL，平衡时间为 5h，Langmuir 和拟二级动力学模型分别适用于静态和动力学吸附行为。同时，选择性吸附研究表明，与具有相似结构的其他物质相比，MIPs 对 BB 具有较高的吸附和选择性。MIPs 还具有良好的可重复使用性能，在重复使用 5 次后仍能保持较高的回收率。应用实验进一步表明，MIPs 可有效从低纯度样品中分离 BB。因此，所制备的 MIPs 具有从 BB 中分离的巨大潜力。
