溶胶凝胶法制备Li+印迹杯4芳烃乙酸聚合物及其吸附研究

摘要

采用溶胶凝胶法，以对叔丁基杯[4]芳烃乙酸为功能单体，钛酸四丁酯为交联剂，Li+为印迹模板离子，聚合得到Li+印迹聚合物材料。利用电子扫描显微镜（SEM）、热重分析仪（TGA）和红外光谱仪（FT-IR）对印迹聚合物结构进行了表征，以及动态吸附试验。结果表明，杯[4]芳烃乙酸印迹聚合物含有-OH、-C=O和-Ti-O-Ti-网络状结构，它们共同参与对Li+的吸附。印迹聚合物与非印迹聚合物相比，微观表面存在提高吸附能力的特征结构，吸附能力有较大的提高。%Based on the SOL-GEL method, taking p-tert-butylcalix [4]arene-acetate as the functional monomer, tetrabutyl orthotitanate as the cross-linker, Li+ as the imprinting template, the imprinted polymer material of lithium ion was prepared in this paper. The structure of imprinted polymer was characterized by using SEM, TGA , FT-IR and dynamic adsorption experiment. The results shows that there are lots of -OH、-C=O and reticular structure of-Ti-O-Ti-in calix[4]arene-acetate imprinted polymer which can participate in Li+adsorption. Compared with non-imprinted polymer, the characteristic structure of microcosmic surface in imprinted polymer can enhance adsorption ability and it has stronger adsorption capacity.