Journal of Radiation Research and Radiation Proces ›› 2018, Vol. 36 ›› Issue (5): 50303-050303.doi: 10.11889/j.1000-3436.2018.rrj.36.050303

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Preparation and characterization of polyvinylidene difluoride microsphere grafted by benzo-15-crown-5 for lithium isotope separation

ZHANG Yating, AO Yinyong, LIU Xuemei, ZHAO Yan, SONG Hongtao, LIU Bo, HUANG Wei   

  1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
  • Received:2018-03-12 Revised:2018-04-10 Online:2018-10-20 Published:2018-10-29
  • Supported by:

    Supported by National Natural Science Foundation of China (No. U1430234)

Abstract:

Polyvinylidene difluoride (PVDF) microspheres functionalized with aminobenzo-15-crown-5 (PGB5) were prepared via pre-irradiation emulsion grafting polymerization of glycidyl methacrylate. The chemical structure and performance in lithium isotope separation of the PGB5 microspheres were characterized by Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis, and scanning electron microscopy (SEM). The loading capacity of aminobenzo-15-crown-5 was ~1.2 mmol/g. The equilibrium adsorption time of PGB5 microspheres for Li+ in aqueous solutions was about 20 h. Moreover, Li+ is more easy to adsorb if the counter anion is softer. Under optimized condition, i.e., 25℃ and pH=7, the maximum adsorption capacity for Li+ reached 4.50 mg/g in a LiSCN solution, and the maximum isotope separation factor reached 1.05±0.02 in a CH3COOLi solution.

Key words: Benzo-15-crown-5, Lithium isotope separation, Pre-irradiation emulsion grafting, Solid-liquid extraction

CLC Number: 

  • TL13