邻苯二甲酸二丁酯印迹吸附材料的合成及性能评价  

Synthesis of Dibutyl Phthalate Molecularly Imprinted Sorbent Material and Evaluation of Its Adsorption Properties

作　　者：张进[1] 田浪[1] 唐红林[1] 牛延慧[1] 王超英[1] 

机构地区：[1]贵州师范学院化学与生命科学学院,贵州贵阳550018

出　　处：《精细化工》2013年第8期866-870,共5页Fine Chemicals

基　　金：贵州省科学技术基金项目(J20112078);贵州省教育厅自然科学基金项目(2010054);贵州省特色重点学科建设项目(2012442)~~

摘　　要：在硅胶表面通过乙烯基三甲氧基硅烷接枝,以邻苯二甲酸二丁酯(DBP)为模板分子,丙烯酸为功能单体制备了DBP印迹聚合物。采用紫外光谱法(UV)研究单体与模板间的相互作用,扫描电子显微镜表征印迹聚合物的表面形貌,红外光谱分析聚合物的结构特征。用平衡吸附实验方法研究聚合物对DBP的结合性能,用Scatchard法分析了MIP-DBP的吸附解离常数(Kd)和吸附容量(Q)。结果表明,高亲和位点的解离常数Kd1=1.141 mmol/L,最大表观吸附量Qmax1=159.75μmol/g。低亲和位点的解离常数Kd2=3.697 mmol/L,最大表观吸附量Qmax2=299.66μmol/g。制备的印迹聚合物对DBP的结构类似物邻苯二甲酸二甲酯(DMP)和邻苯二甲酸二甲氧乙酯(DMOP)的分离因子(α)分别为2.04和1.57,表现出较好的选择性识别能力。Molecularly imprinted polymers （MIP） for dibutyl phthalate surface of silica gel with DBP as template molecule, acrylic aci vinyltrimethoxysilane as grafting DBP） was synthesized on the as functional monomer and agent. The intermolecular interaction between acrylic acid and DBP was confirmed by ultraviolet spectroscopy （UV）, the surface morphology of the MIP was characterized by means of scanning electron microscope （SEM） and the structure of polymers was analyzed by Fourier transform infrared spectroscopy （FTIR）. The binding properties of the MIP were evaluated by equilibrium adsorption experiment method. The Scatchard plot suggested that the template-polymer system had two sites of adsorption behavior with the dissociation constant （Kd ） of 1. 141 mmol/L, 3. 697 mmol/L and the max adsorption capacity （ Qmax ） of 159.75 μmol/g, 299.66 μmol/g for the higher affinity site and lower affinity site, respectively. In addition, the selectivity factor of DBP towards dimethyl phthalate （ DMP ） and bis （ methoxyethyl ） phthalate （ DMOP ） was 2. 04 and 1.57, respectively, indicating its good recognition characteristic to DBP.

关 键 词：邻苯二甲酸二丁酯 表面分子印迹技术 硅胶 选择性吸附 功能材料 

分 类 号：TQ414.1[化学工程]