Colloid and Polymer Science

, Volume 293, Issue 1, pp 109–123 | Cite as

Thermal-responsive ion-imprinted polymer based on magnetic mesoporous silica SBA-15 for selective removal of Sr(II) from aqueous solution

  • Yan Liu
  • Rui Chen
  • Dandan Yuan
  • Zhanchao Liu
  • Minjia Meng
  • Yun Wang
  • Juan Han
  • Xiangguo Meng
  • Fangfang Liu
  • Zhaoyong Hu
  • Wenlu Guo
  • Liang Ni
  • Yongsheng Yan
Original Contribution


Highly thermal-responsive magnetic Sr(II)-imprinted polymer (Sr(II)-TMIIP) was successfully synthesized as a potential effective adsorbent for selective removal of Sr(II) in aquatic environments. First, magnetic polyethyleneimine-loaded mesoporous SBA-15 (Fe3O4@PEI-SBA-15) was prepared via a simple polymer-mediated self-assembly method. Then, the surface of Fe3O4@PEI-SBA-15 was endowed with reactive vinyl groups through modification with 3-(methacryloyloxy)propyl trimethoxysilane (MPS). With the aid of vinyl groups, free radical polymerization of N-isopropylacrylamide (NIPAM), methacrylic acid (MAA), and N,N′-methylenebisacrylamide (BIS) in the presence of Sr(II) was performed with 2,2′-azobisisobutyronitrile (AIBN) as initiator, which provided a desired imprinted layer coating onto Fe3O4@PEI-SBA-15. The as-prepared Sr(II)-TMIIP was characterized by Fourier transmission infrared spectra (FT-IR), X-ray diffractometer (XRD), thermogravimetric analysis (TGA), scanning electron microscope (SEM), transmission electron microscope (TEM), vibrating sample magnetometer (VSM), UV, and N2 adsorption–desorption techniques. The results showed that the Sr(II)-TMIIP exhibited thermal stability, temperature and magnetic sensitivity (M s = 10.34 emu/g), and ordered mesoporous structure. Batch mode adsorption studies were conducted to investigate the specific binding kinetics, adsorption equilibrium, and selective recognition ability of Sr(II)-TMIIP. Adsorption equilibrium experiments showed that the adsorption amount strongly depended on temperature and reached a maximum around the lower critical solution temperature (LCST). Regeneration experiments indicated that repeated adsorption and desorption by temperature swings were possible. Compared with the nonimprinted polymer (NIP), the Sr(II)-TMIIP had good temperature response and excellent selectivity and reusability, making it possible in applying for Sr(II) separation and controlled release.


Thermal-responsive Ion-imprinted polymer Magnetic SBA-15 Sr(II) 



This work was financially supported by the National Natural Science Foundation of China (Nos. 21207051, 21206059), Ph.D. Programs Foundation of Ministry of Education of China (No. 20123227120015), China Postdoctoral Science Foundation funded project (No. 2012M511220, 2013M531284), Natural Science Foundation of Jiangsu Province (No. BK2011459), Special Financial Grant from the China Postdoctoral Science Foundation (2014T70488), Society Development Fund of Zhenjiang (Nos. SH2012021, SH2013110), Programs of Senior Talent Foundation of Jiangsu University (No. 11JDG125), and Programs of innovation practical training of students of Jiangsu University (Nos. 201410299153W, 201410299154W).

Supplementary material

396_2014_3393_MOESM1_ESM.doc (84 kb)
Fig. S1 (DOC 84 kb)
396_2014_3393_MOESM2_ESM.doc (28 kb)
Table S1 (DOC 28 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Yan Liu
    • 1
  • Rui Chen
    • 2
  • Dandan Yuan
    • 1
  • Zhanchao Liu
    • 3
  • Minjia Meng
    • 1
  • Yun Wang
    • 1
  • Juan Han
    • 4
  • Xiangguo Meng
    • 2
  • Fangfang Liu
    • 1
  • Zhaoyong Hu
    • 3
  • Wenlu Guo
    • 2
  • Liang Ni
    • 1
  • Yongsheng Yan
    • 1
  1. 1.School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiangChina
  2. 2.School of Biology and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiangChina
  3. 3.School of Materials Science and EngineeringJiangsu University of Science and TechnologyZhenjiangChina
  4. 4.School of Food and Biological EngineeringJiangsu UniversityZhenjiangChina

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