Study on Synthesis of Magnetic Polystyrene-Chloromethyl Styrene Material and Its Adsorption Properties for Anthracene

KeyWord:magnetic polystyrene-chloromethyl styrene material  anthracene  adsorption

Abstract:

      The magnetic polystyrene-chloromethyl styrene material£¨Fe3O4@SiO2@DVB-VBC£© was synthesized by in situ polymerization initiated with 2,2-azobisisobutyronitrile(AIBN).4-chloromethyl styrene(VBC) and divinylbenzene(DVB) were chosen as monomer and crosslinking agent, respectively. Magnetic ¦Ã-methacryloxypropyltrimethoxysilane£¨MPS£© modified silica microspheres were used as the cores. The mixture of toluene and polyethylene glycol 2000£¨1¡Ã2,by mass£© was used as the combined porogen. The structure and composition of Fe3O4@SiO2@DVB-VBC material were characterized by Fourier transform infrared spectroscopy£¨FT-IR£©,X-ray diffraction£¨XRD£© and nitrogen physical adsorption.The enrichment performance of Fe3O4@SiO2@DVB-VBC material was investigated by using anthracene as the target compound.The result indicated that the adsorption ability of the material could be affected by the mass ratio of monomers and crosslinking agent.Under the condition that the mass ratio of monomers and crosslinking agent was set by 1¡Ã4,the prepared material showed the best adsorption performance for anthracene.The pore structure of the material could affect the adsorption equilibrium time.The adsorption equilibrium for authracene was achieved within 30min,and the adsorption rate was calculated to be 95%.The adsorption mechanism between aromatic compounds and the prepared adsorbentis depended mainly on the hydrophobic interaction.The study of adsorption kinetics indicated that the adsorption behavior fitted well with the pseudo first-order kinetics model.99% anthracene could be eluted from the absorbent by using 2mL of acetonitrile within 15min.