γ射线辐照合成γFe_2O_3/聚苯乙烯磁性复合微球  

γ-ray irradiation synthesis of γ-Fe_2O_3/polystyrene magnetic composite microspheres

作　　者：葛学武[1] 吴大珍[1] 储松南[1] 张志成[1] 

机构地区：[1]中国科学技术大学高分子科学与工程系,合肥230026

出　　处：《辐射研究与辐射工艺学报》2005年第1期40-44,共5页Journal of Radiation Research and Radiation Processing

基　　金：安徽省自然科学基金(01044804)资助

摘　　要：结合 Co γ 射线辐照与分散聚合,分别通过两步法和一步法,在常温常压下,成功地合成了 γ?Fe2O3/ 60聚苯乙烯(γ?Fe2O3/PSt)磁性复合微球,并对复合微球的形成机理进行了探讨。用透射电子显微镜 (TEM)、电子衍射(ED) X 射线衍射(XRD)、付里叶变换红外(FTIR)光谱对样品进行表征和研究。实验结果表明, 、产品为多个 γ?Fe2O3纳米粒子均匀地分散于 PSt 微球中的 γ?Fe2O3/PSt 磁性复合微球,体系中的丙烯酸(AA)对磁性复合微球的形成起到了非常重要的作用。By combining dispersion polymerization and γ-ray irradiation, γ-Fe2O3/polystyrene (γ-Fe2O3/PSt) magnetic composite microspheres were produced at room temperatures under ambient pressure via one-step method or two-steps method. Formation mechanisms of the magnetic composite microspheres were studied. The magnetic composite microspheres were characterized and studied with transmission electron microscope (TEM), electron diffraction (ED), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The results show that the magnetic composite PSt microspheres containing homogeneously dispersed γ-Fe2O3 nanoparticles and the acrylic acid in the system played an important role in the synthesis of the magnetic composite microspheres.

关 键 词：^60Coγ射线辐照 分散聚合 γ-Fe2O3/PSt磁性复合微球 

分 类 号：O632.13[理学—高分子化学] O614.811[理学—化学]