色谱

色谱 ›› 2015, Vol. 33 ›› Issue (12): 1234-1241.DOI: 10.3724/SP.J.1123.2015.08035

• 研究论文 • 上一篇    下一篇

4-甲基咪唑磁性表面分子印迹聚合物的制备及其应用

祁玉霞1, 赵丽娟1, 马梅花1, 魏缠玲1, 李亚1, 李文婧1, 龚波林1,2   

  1. 1. 宁夏大学化学化工学院, 宁夏 银川 750021;
    2. 北方民族大学化学与化学工程学院, 宁夏 银川 750021
  • 收稿日期:2015-08-28 出版日期:2015-12-08 发布日期:2012-06-21
  • 通讯作者: 龚波林
  • 基金资助:

    国家自然科学基金项目(31271868);宁夏自然科学基金项目(NZ13045).

Preparation and applications of 4-methyl imidazole magnetic surface molecularly imprinted polymers

QI Yuxia1, ZHAO Lijuan1, MA Meihua1, WEI Chanling1, LI Ya1, LI Wenjing1, GONG Bolin1,2   

  1. 1. School of Chemistry & Chemical Engineering, Ningxia University, Yinchuan 750021, China;
    2. School of Chemistry & Chemical Engineering, Beifang University of Nationalities, Yinchuan 750021, China
  • Received:2015-08-28 Online:2015-12-08 Published:2012-06-21

PDF

95

被引次数

1

摘要：

以4-甲基咪唑(4-MI)为模板分子,甲基丙烯酸(MAA)为功能单体,利用Fe3O4磁性纳米微球制备了具有特异性识别能力的磁性表面分子印迹聚合物(MIP),并用红外光谱(FT-IR)、X-射线衍射(XRD)、透射电子显微镜(TEM)和振动样品磁强计(VSM)对聚合物进行了表征,结果显示磁性载体表面包覆了分子印迹聚合物薄层。用紫外分光光度法对4-MI与MAA的相互作用进行了分析,结果表明主客体主要存在形式为1个4-MI被1个MAA所包围。通过紫外分光光度法对磁性印迹聚合物的吸附性能进行了研究,静态吸附平衡实验和Scatchard分析结果表明Fe3O4@(4-MI-MIP)中存在两类不同的结合位点,最大吸附量分别为40.31 mg/g和23.07 mg/g,平衡解离常数分别为64.85 mg/L和30.41 mg/L。动力学研究表明准二级动力学方程能较好地拟合动力学实验结果,该过程符合准二级动力学模型。该磁性印迹聚合物应用于环境水样中4-MI的吸附,取得了较满意的结果。

关键词: 4-甲基咪唑, Fe3O4磁性纳米微球, 分子印迹聚合物, 环境水

Abstract:

The magnetic surface molecularly imprinted polymers (MIPs) with specific recognition of 4-methyl imidazole (4-MI) were prepared by using 4-MI as template molecule, methacrylic acid (MAA) as functional monomer and Fe3O4 as magnetic fluid. The polymers were characterized by of Fourier transform infrared spectrometer (FT-IR) analysis, X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The results demonstrated that an imprinted polymer layer was successfully coated onto the surface of modified Fe3O4 nanomaterials, resulting in a narrow diameter distribution and good magnetic responsibility. The ultraviolet (UV) spectrophotometry was used to demonstrate the interaction between 4-MI and MAA. It was found that one 4-MI molecule was entrapped by one MAA molecule, which was the main existing form of subject and object. By UV spectrophotometric method to study the adsorption performance of magnetic molecularly imprinted polymers, the specific adsorption equilibrium and selectivity were evaluated by batch rebinding studies. The Scatchard analysis showed that there were two kinds of binding sites in the Fe3O4@(4-MI-MIP). The corresponding maximum adsorption capacities of 4-MI onto Fe3O4@(4-MI-MIP) were 40.31 mg/g and 23.07 mg/g, and the dissociation constants were 64.85 mg/L and 30.41 mg/L, respectively. The kinetic experimental data were correlated with second-order kinetic model. The magnetic molecularly imprinted polymers were used for the adsorption of 4-methyl imidazole in environmental water samples, and good results were obtained.

Key words: 4-methyl imidazole (4-MI), environment water, Fe3O4 magnetic nanoparticles, molecularly imprinted polymers (MIPs)

中图分类号: