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以氯化汞和表面活性剂(十六烷基三甲基溴化铵)为模板,N-(2氨-乙基)-3氨-丙基三甲氧基硅烷为功能单体,正硅酸乙酯为交联剂,利用双重印迹法制备了一种双模板介孔印迹聚合物。利用红外光谱和扫描电镜对印迹聚合物进行微观表征,通过平衡吸附实验研究双模板印迹聚合物的吸附性能和选择识别性能,并且探讨了印迹聚合物用量、pH值以及吸附时间对吸附性能的影响。结果表明,合成的双模板印迹聚合物具有较高的吸附能力和选择识别能力,并且具有较快的吸附速率,20min可达到吸附平衡,重复使用性能良好。在竞争离子Pb2+的存在下,最大相对选择性系数可达到73。双模板汞离子印迹聚合物在汞离子的富集与分离领域有良好的应用前景。
Using mercuric chloride and surfactant (cetyltrimethylammonium bromide) as template, N- (2-amino-ethyl) -3amino-propyltrimethoxysilane as functional monomer and orthosilicic acid Ethyl methacrylate as cross-linking agent, a double-template mesoporous polymer was prepared by double-blotting. The imprinted polymers were characterized by FTIR and SEM. The adsorption properties and selective recognition properties of the imprinted polymers were studied by equilibrium adsorption experiments. The effects of imprinted polymer amount, pH value and adsorption time on the adsorption properties were also discussed . The results show that the synthesized double template imprinted polymer has high adsorption capacity and selective recognition ability, and has a faster adsorption rate, adsorption equilibrium can be achieved after 20 min, and the repeated use performance is good. In the presence of competitive ions Pb2 +, the maximum relative selectivity coefficient can reach 73. The double template mercury ion imprinted polymer has a good application prospect in the field of mercury ion enrichment and separation.