利用分子印迹技术制备了重金属镉(Ⅱ)的印迹聚合物,并对其识别性能进行定量描述.以镉(Ⅱ)离子为模板,安息香肟为功能单体,乙二醇二甲基丙烯酸酯为交联剂,偶氮二异丁腈为引发剂,采用本体聚合法制备印迹聚合物.实验结果表明,与未印迹的聚合物相比较,印迹聚合物对镉(Ⅱ)离子具有较好的识别选择性,达到吸附平衡的时间为50 min,初始浓度为10 mg/mL时,吸附量为2.12 mg/g,并推测了该印迹聚合物和镉离子的识别机理.
A novel type ion imprinted polymer(IIP) was prepared by molecular imprinting technology(MIT).The selectivity and adsorption capacity for the Cd(Ⅱ) ions of Cd(Ⅱ)-MIP were systematically studied in this paper.The IIP was prepared by bulk polymerization using Cd(Ⅱ) ion as a template,α-benzoin oxime as a functional monomer and ethylene glycol dimethacrylate(EGDMA) as a crosslinker.The results obtained show that,in comparison with non-imprinted polymer,the sorption equilibrium was achieved in 50 min and the maximum sorption of Cd(Ⅱ) imprinted polymer was about 2.12 mg/g.The mechanism for the adsorption of Cd(Ⅱ) on the imprinted polymers were investigated.