四环素分子印迹聚合物的制备及吸附性能研究

Preparation and Adsorption Properties Research of Tetracycline Molecularly Imprinted Polymer

以甲基丙烯酸(MAA)为功能单体,乙腈为溶剂,三羟甲基丙烷三甲基丙稀酸酯(TRIM)为交联剂,通过热聚合法合成了四环素为模板的分子印迹聚合物(MIPs)。采用FE-SEM、FT-IR对MIPs和非印迹聚合物(NIPs)进行了表征,考察了引发剂和溶剂的用量对MIPs产量和吸附容量的影响,研究了MIPs和NIPs的静态吸附等温线和动力学吸附性能。结果表明:MIPs的最佳制备条件是偶氮二异丁腈60 mg、乙腈40 mL。MIPs对四环素的吸附满足弗兰德里希等温线和准二级动力学吸附模型,是通过化学作用进行的多层吸附,通过计算出的最大吸附容量为133.576 mg/g。

Using methacrylic acid as the functional monomer,acetonitrile as the solvent,and trimethylolpropane trimethacrylate as the crosslinking agent,molecularly imprinted polymer of tetracycline is synthesized by thermal polymerization,MIPs and NIPs are characterized by FE-SEM and FT-IR,the effects of initiator and solvent amount on the yield and adsorption capacity of MIPs are investigated,the static adsorption isotherms and kinetic adsorption properties of MIPs and NIPs are studied.The results show that the optimal preparation conditions for MIPs are 60 mg of azobisisobutyronitrile and 40 mL of acetonitrile.The adsorption of tetracycline by MIPs conforms to Freundlich isotherm and quasi-second-order kinetic adsorption model,which is a multi-layer adsorption mechanism through chemical action,and the calculated maximum adsorption capacity is 133.576 mg/g.