Preparation of Magnetic Imprinted Polymer by Surface Grafting and Its Recognition Performance for Dibutyl Phthalate
10.11895/j.issn.0253-3820.160849
- VernacularTitle:表面接枝法制备磁性邻苯二甲酸二丁酯印迹聚合物及其识别性能研究
- Author:
Wanzhen XU
;
Xiaoming ZHANG
;
Weihong HUANG
;
Yijing NIE
;
Wenming YANG
- Keywords:
Dibutyl phthalate;
Molecularly imprinted polymer;
Selectivity;
Sorbent
- From:Chinese Journal of Analytical Chemistry
2017;45(4):521-528
- CountryChina
- Language:Chinese
-
Abstract:
The magnetic molecularly imprinted polymers (MMIPs), based on the surface of magnetic nanoparticles being modified by surface grafting, have been successfully synthesized, with dibutyl phthalate (DBP) as template molecule, ethylene glycol dimethacrylate (EGDMA) as cross-linking agent and azobisisobutyronitrile (AIBN) as initiator. Scanning electron microscopy (SEM), transmission electron microscope (TEM), and elemental analysis were employed to characterize the MMIPs. The structure and magnetic properties of the MMIPs were investigated by means of X-ray diffraction and vibrating sample magnetometer. The BET surface area shows that MMIPs is 380 m2/g and MNIPs is 324 m2/g. A series of static adsorption experiments were conducted to analyze its adsorption performance, which followed pseudo-second-order model by the kinetic analysis with correlation coefficient (R2) 0.9797, and Sips equation with correlation coefficient (R2) 0.999 by the isothermal analysis. The imprinting factors of diallyl phthalate (DAP), DBP and di-2-ethylhexyl phthalate (DEHP) were 1.53, 2.21 and 1.39 respectively, showing that MMIPs had better recognition performance for DBP. The experiment of regeneration recycles with five times showed the regeneration ability of DBP was only reduced by 12.3％.
