Synthesis and characterization of a high selective mercury(II)-imprinted polymer using novel aminothiol monomer.
Synthesis and characterization of a high selective mercury(II)-imprinted polymer using novel aminothiol monomer.
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DOI：
10.1016/j.talanta.2012.09.023
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发表时间：
2012-11
期刊：
影响因子：
6.1
通讯作者：
Mahmoud Firouzzare;Qiuquan Wang
中科院分区：
文献类型：
--
作者：
Mahmoud Firouzzare;Qiuquan Wang
以2-巯基乙胺为原料，合成了一种新型的巯基氨基单体，用于配位汞离子。以甲基丙烯酸、乙二醇二甲基丙烯酸酯和偶氮二异丁腈分别为功能单体、交联剂和引发剂，在二甲基亚砜和甲苯二元致孔剂存在下，通过自由基共聚制备了Hg（II）分子印迹聚合物。批处理结果表明，Hg（II）印迹聚合物的吸附容量为28 mgg −1。相对于CH 3 Hg（I）、Zn（II）、Cd（II）和非印迹聚合物的Kd值，Hg（II）印迹聚合物的分配比（Kd）值对于汞增加。Hg（II）/CH 3 Hg（I）、Hg（II）/Cd（II）和Hg（II）/Zn（II）的相对选择因子k分别为15.5、12.5和20.6，均大于1。还通过热重分析研究了热稳定性，其显示聚合过程将热稳定性提高至125°C。
A novel aminothiol monomer was synthesized from' 2-mercaptoethylamine for complexing the Hg(II) ion. The synthesized complex monomer has been used for preparing the Hg(II)-imprinted polymer by radical copolymerization with methacrylic acid and ethylene glycol dimethacrylate and AIBN as the functional monomer, cross-linker and initiator respectively in the presence of a binary porogen of DMSO and toluene. The results of batch procedures showed that the Hg(II)-imprinted polymer has adsorption capacity of 28mgg−1. The distribution ratio (Kd) values of the Hg(II)-imprinted polymer increases for mercury with respect to both Kdvalues of CH3Hg(I), Zn(II), Cd(II) and non-imprinted polymers. The relative selective factors k for Hg(II)/ CH3Hg(I), Hg(II)/Cd(II) and Hg(II)/Zn(II) are 15.5, 12.5, and 20.6, which are greater than 1. The thermal stability has also been investigated by thermogravimetric analysis which shows that the polymerization process increases the thermal stability up to 125°C.