Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (5): 600-608.DOI: 10.11944/j.issn.1000-0518.2018.05.170138

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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)


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