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本研究以刚果红为模板分子,α-甲基丙烯酸(MAA)为功能单体,二甲基丙烯酸乙二醇酯(EGDMA)为交联剂,乙腈为致孔剂,2,2-偶氮二异丁腈(AIBN)为引发剂,采用沉淀聚合法制备了刚果红分子印迹聚合物纳米微球(MIP).通过扫描、透射电镜对聚合物的结构和形貌进行了表征,结果显示制备的MIP微球的粒径在90 nm左右,粒径较为均匀.利用氮气吸附脱附实验测定了聚合物颗粒的比表面积和孔容.并对诸多吸附影响因素以及分子印迹聚合物的吸附能力、选择性和重复利用率进行了分析.结果表明,MIP对刚果红表现出较好的选择性识别能力,可多次循环使用,能用于染料废水中刚果红的选择性吸附.
In this study, Congo red as a template molecule, α-methacrylic acid (MAA) as a functional monomer, ethylene glycol dimethacrylate (EGDMA) as a crosslinking agent, acetonitrile as a porogen, 2,2- (AIBN) as initiator, the Congo red imprinted polymer nano-microspheres (MIP) were prepared by precipitation polymerization.The structure and morphology of the polymer were characterized by scanning electron microscopy and transmission electron microscopy.The results showed that the prepared MIP microspheres have a particle size of about 90 nm and a relatively uniform particle size.The specific surface area and pore volume of the polymer particles were measured by nitrogen adsorption and desorption experiments and the influence of many adsorption factors and the adsorption capacity of the molecularly imprinted polymer, Selectivity and reutilization were analyzed.The results showed that MIP showed good selectivity for Congo red and could be recycled for many times and could be used for the selective adsorption of Congo red in dye wastewater.