焦性没食子酸分子印迹聚合物的制备与吸附特征研究  

Preparation and adsorption characteristics of molecularly imprinted polymers with pyrogallic acid as template

作　　者：方卢秋[1] 祝媛[1] 

机构地区：[1]长江师范学院化学化工学院,重庆408100

出　　处：《现代化工》2012年第1期57-60,62,共5页Modern Chemical Industry

摘　　要：以焦性没食子酸为模板分子,丙烯酸为功能单体,甲醇为溶剂,研究了模板分子与功能单体的结合比例,表明焦性没食子酸和丙烯酸之间通过氢键形成1∶1型配合物。在模板分子与功能单体、交联剂物质的量的比为1∶4∶20的条件下,采用沉淀聚合法制备了焦性没食子酸分子印迹聚合物微球。静态吸附实验表明,可制备出吸附量大且特异性识别能力较高的分子印迹聚合物,对焦性没食子酸有较高的亲和性和选择性。采用恒温振荡平衡吸附法以及Scatchard分析研究了聚合物的吸附特征,结果表明焦性没食子酸分子印迹聚合物在水环境下存在2种吸附位点,最大表观吸附量分别为7.5516μg/mg和11.9225μg/mg,平衡离解常数分别为9.2720×10-3mmol/L和0.1892 mmol/L。In this paper, using pyrogallic acid as the template, acrylic acid as the functional monomer, and methanol as the solvent, the molecularly imprinted polymers were prepared for the pyrogallic acid separation and enrichment to remove the pyrogallic acid in the industrial sewage. The combination ratio of template molecule and functional monomer was studied. The results show that the pyrogallic acid combined with acrylic acid can be obtained by hydrogen bonding with 1：1 of the combination ratio. The molecularly imprinted polymer microspheres of pyrogallic acid are prepared by precipitation polymerization. The static adsorption experiment indicates that when the molar ratio of template molecule, functional monomer and erosslinker is 1：4： 20, the molecularly imprinted polymer with high adsorption quantity and high selectivity could be prepared. By constant temperature shaking,the adsorption characteristics of polymer are analyzed by adsorption equilibrium and Scatchard. The results show that there are two kinds of adsorption sites in the polymer. Their maximum apparent adsorption amounts are 7. 5516 μg/mg and 11. 9225 μg/mg, and the balance dissociation constants are 9. 2720×10^（-3） mmol/L and 0.1892 mmol/L.respectively.

关 键 词：焦性没食子酸 分子印迹聚合物 吸附 

分 类 号：O657.31[理学—分析化学]