Center for Green Chemistry and Organic Functional Materials Laboratory, Xinjiang Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Urumqi, China.
University of the Chinese Academy of Sciences, Beijing, China.
J Mol Recognit. 2018 Mar;31(3). doi: 10.1002/jmr.2627. Epub 2017 Mar 22.
Molecularly imprinted polymers (MIPs) were designed and prepared via bulk thermal polymerization with gossypol as the template molecule and dimethylaminoethyl methacrylate as the functional monomer. The morphology and microstructures of MIPs were characterized by scanning electron microscope and Brunauer-Emmett-Teller surface areas. Static adsorption tests were performed to evaluate adsorption behavior of gossypol by the MIPs. It was found that adsorption kinetics and adsorption isotherms data of MIPs for gossypol were fit well with the pseudo-second-order model and Freundlich model, respectively. Scatchard analysis showed that heterogeneous binding sites were formed in the MIPs, including lower-affinity binding sites with the maximum adsorption of 252 mg/g and higher-affinity binding sites with the maximum adsorption of 632 mg/g. Binding studies also revealed that MIPs had favorable selectivity towards gossypol compared with non-imprinted polymers. Furthermore, adsorption capacity of MIPs maintained above 90% after 5 regeneration cycles, indicating MIPs were recyclable and could be used multiple times. These results demonstrated that prepared MIPs could be a promising functional material for selective adsorption of gossypol.
棉花酚印迹聚合物（MIPs）是通过本体热聚合设计和制备的，模板分子为棉酚，功能单体为二甲氨基乙基甲基丙烯酸酯。采用扫描电子显微镜和 Brunauer-Emmett-Teller 表面积对 MIPs 的形态和微观结构进行了表征。通过静态吸附实验评价了 MIPs 对棉酚的吸附行为。结果表明，MIPs 对棉酚的吸附动力学和吸附等温线数据分别与准二级动力学模型和 Freundlich 模型拟合较好。Scatchard 分析表明，MIPs 中形成了非均相结合位，包括最大吸附量为 252mg/g 的低亲和力结合位和最大吸附量为 632mg/g 的高亲和力结合位。结合研究还表明，与非印迹聚合物相比，MIPs 对棉酚具有良好的选择性。此外，MIPs 在 5 次再生循环后吸附容量仍保持在 90%以上，表明 MIPs 可重复使用，可多次回收利用。这些结果表明，制备的 MIPs 可能是一种用于棉酚选择性吸附的有前途的功能材料。
