基于绿色化学制备印迹聚合物及富集丙溴磷的研究

Magnetic Molecularly Imprinted Polymers Based on a Green Synthesis Strategy for Magnetic Solidphase Extraction of Profenofos

基于绿色化学理念,采用水为溶剂,丙溴磷(PFF)为模板分子,壳聚糖为功能单体,戊二醛为交联剂,成功制备了高灵敏、高选择性的PFF磁性分子印迹聚合物(PFFMMIPs)。同时,利用扫描电镜、傅里叶变换红外光谱、X射线衍射仪等对聚合物进行了表征,并对PFF-MMIPs的吸附性能和选择性进行了考察。结果表明,PFF-MMIPs具有良好的热稳定、较强的磁性、较高的吸附量(33.6mg·g^(-1))、快速吸附能力(60min)以及高效选择性。对吸附性能数据进行数学拟合,结果表明PFF-MMIPs对目标化合物PFF的吸附过程符合Langmuir模型和伪二级动力学模型。

Using water as the solvent,profenofos(PFF)as the template molecule,chitosan as the functional monomer,and glutaraldehyde as the crosslinking agent,PFF magnetic molecularly imprinted polymers(PFFMMIPs)with high sensitivity and selectivity were successfully prepared employing the green chemistry concept.Meanwhile,scanning electron microscopy,Fourier transform infrared spectroscopy,and Xray diffractometer were used to characterize the polymers.In addition,the adsorption properties and selectivity of PFFMMIPs were investigated.The results showed that the PFFMMIPs had strong magnetic properties,good thermal stability,high adsorption capacity(33.6 mg·g^(-1)),rapid adsorption capacity(60 min),and efficient selectivity.Furthermore,the PFFMMIPs adsorption process on the target molecule PFF was also consistent with the Langmuir isotherm model and the pseudosecond kinetic model,according to mathematical fitting of the adsorption performance data.