苯胺印迹聚合物的制备及吸附性能研究

Study on Prepared of Aniline Molecularly Imprinted Polymers and Its Adsorption Performance

采用分子印迹技术,以苯胺为模板分子,甲基丙烯酸为功能单体,二甲基丙烯酸乙二醇酯为交联剂,制备了苯胺分子印迹聚合物。采用静态吸附法考察了影响该聚合物吸附苯胺的因素,并对等温吸附过程和吸附机理进行了判断。结果表明,该印迹聚合物对苯胺具有优良的吸附效果,在p H为6.0,底液苯胺的质量浓度为300 mg/L、吸附60min、投加量为2 g/L的条件下,该聚合物对苯胺的吸附量46.89 mg/g;该等温吸附过程符合Langmuir方程,饱和吸附量为52.52 mg/g,吸附动力学研究表明,该吸附过程符合准2级动力学方程,吸附速率常数为5.11 g/(g·min)。

Molecularly imprinted polymers （MIP） were prepared by using aniline as the template molecule, methyl acrylic acid as the functional monomer and ethylene glycol dimethacrylate as the crosslinking agent. The factor affected the adsorption performance of MIP was studied by static adsorption method, the adsorption mechanism and adsorption isothermal were investigated, The result showed that, the MIP had good adsorption efficiency for aniline, the aniline adsorption capacity was 46.89 mg/g at pH was 6.0, initial mass concentration of aniline was 300 mg/L, adsorption time was 60 min and MIP dosage was 2 g/L. The isotherms adsorption process fit the Langmuir equation, the saturation adsorption was 52.52 mg/g. The adsorption process fit to a pseudo-second-order kinetics, the adsorption rate constant was 5.11 g/（g·min）.