Fe_3O_4@SiO_2@PGA磁性吸附材料的制备与表征

Preparation and characterization of Fe_3O_4@SiO_2@PGA magnetic adsorbent materials

首先以共沉淀法制备了磁性纳米颗粒Fe_3O_4并在表面包覆SiO_2,制得Fe_3O_4@SiO_2磁性纳米颗粒.然后由PBLG水解制得PGA为共聚组分,过硫酸铵为引发剂,EGDMA为交联剂,使用自由基共聚制备交联共聚物,同时加入Fe_3O_4@SiO_2纳米颗粒,制备得到Fe_3O_4@SiO_2@PGA磁性纳米粒子.通过核磁(~1H-NMR),红外(FT-IR),X-射线衍射(XRD),动态光散射(DLS)和透射电镜(TEM)等一系列手段对磁性纳米粒子的结构和形貌进行了表征,初步证明了制备的样品具有稳定的结构和良好的磁性.

Magnetic nanoparticles Fe3O4 were prepared by coprecipitation method and coated with SiO2 on the surface to prepare Fe3O4@SiO2 magnetic nanopartieles. PGA was prepared by hydrolysis of PBLG as copolymerization component, ammonium per- sulfate as initiator, and EGDMA as erosslinking agent;Free radical copolymerization was used to prepare erosslinked copolymer, and Fe3O4@SiO2 nanopartieles were added to prepare Fe3O4@SiO2@PGA magnetic nanopartieles. The structure and morphol- ogy of magnetic nanoparticles were studied by a series of methods such as I H-NMR, FT-IR, X-ray diffraction（XRD） , dynamic light seattering（DIS） and transmission electron microscopy（TEM）. The results indicated that the prepared samples had stable strueture and good magnetic properties.