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氧化还原引发制备乙氧酰胺苯甲酯分子印迹微球及其表征
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李兆周,李智丽,陈秀金,李道敏,高红丽,曹力,侯玉泽,李松彪,牛晓慧,赵振威,赵晓波,陈慧,陈凤阁 河南科技大学食品与生物工程学院 
基金项目:河南科技大学博士科研启动基金( 09001609);教育部地方高校国家级大学生创新创业训练计划(201310464007);河南科技大学青年科学基金(2013QN021);河南科技大学创新培育基金(2014ZCX021);河南科技大学大学生研究训练计划(2014118);河南省教育厅科学技术研究重点项目(14B550015)
中文摘要:以乙氧酰胺苯甲酯为模板分子,甲基丙烯酸为功能单体,季戊四醇三丙烯酸酯为交联剂,在过氧化苯甲酰和N,N-二甲基苯胺的引发作用下,制备了乙氧酰胺苯甲酯的分子印迹聚合物微球。优化的致孔溶剂为乙腈,模板、单体和交联剂的摩尔比为1∶6∶20。采用高效液相色谱法测定模板分子及其结构类似物的浓度,结合静态平衡吸附实验、吸附动力学实验和选择性评价,对聚合物的吸附性能进行了研究,所得微球的静态吸附量为15.0 μmol?g-1,印迹因子为4.93。采用扫描电子显微镜、红外光谱仪和差示扫描量热仪表征聚合物的理化特性,结果表明,微球的形貌规则,印迹效应显著,热稳定性较好。本研究所采用的氧化还原引发方法具有制备简便、成本低以及特异性好等优点,为分子印迹聚合物的引发制备提供了新思路。
中文关键词:氧化还原引发  乙氧酰胺苯甲酯  分子印迹聚合物  微球
 
Preparation and Characterization of Ethopabate Imprinted Microspheres Based on an Oxidation-reduction Initiating System
Abstract:With the initialization of benzoyl peroxide and N,N-dimethyl aniline,the molecular imprinted polymer(MIP)microspheres were firstly prepared by using ethopabate as template,methacrylic acid as functional monomer and pentaerythritol triacrylate as crosslinking agent.The optimized porogen was acetonitrile and the optimum molar ratio of template,monomer and cross-linker was 1 ∶6 ∶20.After determining the concentrations of ethopabate and structurally related compounds by high performance liquid chromatographic method,the adsorption properties of the polymers were studied by static equilibrium adsorption,adsorption dynamics and selective binding experiment.The adsorption capacity and imprinting factor were calculated to be 15.0 μmol?g-1 and 4.93,respectively.The physical and chemical properties of MIP microsperes were investigated with scanning electron microscope,Fourier transform infrared spectroscopy and differential scanning calorimeter.The result showed that the microspheres had uniform morphology,significantly high imprinting effect and good thermal stability.The above characteristics are favorable to the selective separation and purification of ethopabate from complex matrix using the microspheres.Therefore,the proposed oxidation-reduction system for initialization not only has the advantages of simple preparation,low cost and good specificity,but also offers a new paradigm for the preparation of molecular imprinted polymers.
Key Words:oxidation-reduction initiating  ethopabate  molecularly imprinted polymers  microspheres
引用本文:李兆周,李智丽,陈秀金,李道敏,高红丽,曹力,侯玉泽,李松彪,牛晓慧,赵振威,赵晓波,陈慧,陈凤阁.氧化还原引发制备乙氧酰胺苯甲酯分子印迹微球及其表征[J].分析测试学报,2015,34(7):768-774.
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