应用化学 ›› 2018, Vol. 35 ›› Issue (5): 600-608.DOI: 10.11944/j.issn.1000-0518.2018.05.170138

• 研究论文 • 上一篇    下一篇

没食子酸磁性表面分子印迹聚合物的制备与选择性识别性能

邓慧芸a,王斌a,吴茂a,文瑞芝a,马强a,郭亚平a,邓斌b,谢练武a*()   

  1. a中南林业科技大学理学院,应用化学研究所 长沙 410004
    b湘南学院化学生物与环境工程学院 湖南 郴州 423043
  • 收稿日期:2017-04-27 接受日期:2017-07-03 出版日期:2018-04-23 发布日期:2018-04-23
  • 通讯作者: 谢练武
  • 基金资助:
    人社部留学回国人员择优资助重点项目(人社厅函[2016]176号),湖南省重点实验室专项基金(2014FJ3011,2016XGJSYB01,2015TP4021-5),湖南省普通高校“十二五”专业综合改革试点项目(2012-266)

Preparation and Selective Recognition Property of Magnetic Surface Molecularly Imprinted Polymers with Gallic Acid as Template

DENG Huiyuna,WANG Bina,WU Maoa,WEN Ruizhia,MA Qianga,GUO Yapinga,DENG Binb,XIE Lianwua*()   

  1. aInstitute of Applied Chemistry,College of Sciences,Central South University of Forestry and Technology,Changsha 410004,China
    bSchool of Chemical Biology and Environmental Engineering, Xiangnan University,Chenzhou,Hu'nan 423043,China
  • Received:2017-04-27 Accepted:2017-07-03 Published:2018-04-23 Online:2018-04-23
  • Contact: XIE Lianwu
  • Supported by:
    Supported by the Technology Foundation for Selected Overseas Chinese Scholar of Ministry of Human Resources and Social Security of China(No.2016-176), the Hunan Provincial Key Laboratory Special Foundation of China(No.2014FJ3011, No.2016XGJSYB01, No.2015TP4021-5), the Hu'nan Provincial Colleges and Universities “twelve-five planning” Professional Comprehensive Reform Pilot Project(No.2012-266)

摘要:

羟基苯甲酸类化合物用途广泛,极性较强,在复杂水溶液体系中这些类似物的分离纯化与分析非常困难。 本文以磁性Fe3O4纳米颗粒为载体,没食子酸(GA)为模板分子,制备了磁性表面分子印迹聚合物(MIP)。 利用透射电子显微镜、红外光谱、磁强测定等检测手段对MIP进行了结构表征。 并对其吸附性能进行研究,比较了该MIP对GA及其它3种结构类似物的吸附性能差异。 结果表明,制备的以GA为模板的磁性分子印迹聚合物为核壳球形结构,键合牢固,对GA的吸附动力学符合准二级动力学方程模型,吸附过程属于Langmuir单分子层吸附。 该聚合物对GA表现出优异的选择性识别能力,其吸附量(318 K时37.736 mg/g)远远高于结构类似物。 该磁性分子印迹聚合物对模板分子不仅具有特异识别能力,而且能够磁控分离,分离效率高,可用于固相萃取。

关键词: 表面分子印迹, 选择性识别, 羟基苯甲酸类化合物, 吸附, 磁性Fe3O4

Abstract:

Hydroxybenzoic acid compounds are used widely and have strong polarity. The separation, purification and analysis of their analogues in complex aqueous solution are very difficult. In this paper, magnetic surface molecularly imprinted polymer(MIP) was prepared using nano magnetic Fe3O4 as the carrier and gallic acid(GA) as the template molecule, and characterized by transmission electron microscopy, infrared spectroscopy and magnetic intensity measurement. Then its adsorption properties and adsorptive selectivity were studied by the static adsorption and dynamic adsorption experiments to compare the adsorption properties of GA on MIP with those of 2,4-dihydroxybenzoic acid, salicylic acid and benzoic acid. The results show that the MIP with GA as the template has a core-shell structure with a strong bonding effect, the adsorption process belongs to Langmuir monolayer adsorption and the adsorption kinetics can satisfy the pseudo-second-order kinetic equation model. The MIP exhibits an excellent selectivity for GA, and its adsorption capacity(37.736 mg/g at 318 K) is much higher than those of other structural analogues. The MIP prepared by this method can not only recognize the template molecule, but also be magnetically controlled. The high separation efficiency is applicable to the solid phase extraction.

Key words: surface molecular imprinting, selective recognition, hydroxybenzoic acid, adsorption, magnetic Fe3O4