OALib Journal期刊
ISSN: 2333-9721
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无皂种子乳液聚合制备含稀土磁性荧光微球及其表征
DOI: 10.3724/SP.J.1105.2013.13095, PP. 1453-1458
Keywords: 稀土配合物,无皂种子乳液聚合,磁性荧光微球
Abstract:
以FeCl3?6H2O和FeCl2?4H2O为原料,通过化学共沉淀方法制备Fe3O4磁性纳米粒子,用油酸和十一烯酸钠对纳米粒子进行双重改性,得到固含量为4%的稳定水基磁流体.在该磁流体存在下,以苯乙烯和甲基丙烯酸缩水甘油酯为单体进行无皂乳液聚合,制备出磁性种子微球;在种子磁性微球存在下,以对苯乙烯磺酸钠,稀土配合物等为功能单体,通过无皂种子乳液聚合法制备磁性荧光微球,该微球表现出优异的磁学性能以及荧光性能.用傅立叶红外光谱仪、透射电子显微镜、X射线衍射仪、振动样品磁强计、荧光分光光度计对磁性荧光微球结构形貌以及磁性荧光性能表征.测试结果表明,所制备的种子微球以及磁性荧光微球呈良好的单分散性,Z均粒径分别为147nm和228nm,热重分析表明磁性荧光微球中Fe3O4的含量为4.7%,与之对应的饱和磁化强度为0.396emu/g,在595nm和619nm处观测到Eu3+的特征发射光谱.
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