反相微乳液体系中电子束辐射制备Fe_3O_4/聚丙烯酰胺磁性核壳微球

Preparation of Fe3O4/PAM core-shell magnetic particles in reverse microemulision by E-beam irradiation

在共沉淀法制备Fe3O4纳米磁粉的基础上,以丙烯酰胺(Acrylamide,AM)为单体在反相微乳液中通过电子束辐照的方法制备了具有核壳结构的四氧化三铁/聚丙烯酰胺磁性核壳微球(Fe3O4/Polyacrylamide,PAM),用X射线衍射仪、原子力显微镜、傅立叶变换红外光谱、动态激光光散射仪表征样品。结果表明,制备的磁粉为Fe3O4单相,粒径为9nm左右,磁性高分子微球Fe3O4/PAM直径范围为80-150nm,呈球形。分析了乳化剂用量,单体浓度,磁粉用量,吸收剂量等对Fe3O4/PAM微球粒径的影响规律。

Magnetic nanoparticles were prepared by chemical co-precipitation of ferrouschloride and ferricchloride. Fe3O4/PAM core-shell composite magnetic particles were synthesized by E-beam irradiation in reverse microemulision. The products were characterized by XRD, AFM, FTIR and PCS. The results indicate that the products were single-phase Fe3O4 of about 10 nm in diameter, and the Fe3On/PAM particles were spherical of about 80-150 nm in diameter. It was found that size of the core-shell particles could be controlled by adjusting concentrations of emulsification op-10, monomer AM and magnetic nanoparticles Fe3O4, and the irradiation doses.