摘要
用硅烷偶联剂对由部分还原沉淀法制备的Fe_3O_4磁微粒子进行了表面修饰。并利用XRD,TEM,AFM,IR,古埃磁天平等手段对其结构与性能进行了表征。分析了偶联剂使用量对磁性纳米复合微球性能的影响。研究结果表明,经硅烷偶联剂修饰后的微球表面可带有-OH,-NH_2,-C=O,-C=C等多种有机功能基团,随着硅烷偶联剂用量的增大,微球表面包覆的有机特征基团也增多,偶联反应趋于完全。当硅烷用量较少时,随着用量的增加,磁性能随之提高;而当硅烷用量达到一定值之后,继续增加用量,则会使磁性能降低。磁性纳米复合微球的Zeta电位随着偶联剂用量的增加呈现先增加后降低的变化趋势。
Magnetic microspheres were prepared through partial reduction-precipitation method, and the surface of the spheres was modified using silane-coupling agents （SCA）. The microstructure and properties of the spheres were characterized by XRD, TEM, AFM and IR. Multi functional organic groups were detected on the sphere surface including -OH, -NH2, -C=O, and -C=C. Their amounts increased with increasing silane-coupling agents. The magnetic properties of MCM were enhanced by the addition of SCA within certain content. Beyond this content, the magnetic performance decreased. Accordingly, the Zeta potential of the magnetic microspheres increased at first but then decreased with the addition of the silane-coupling agents.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第A01期733-736,共4页
Rare Metal Materials and Engineering
关键词
复合材料
Fe3O4磁性微球
硅烷偶联剂
磁化率
composite materials
Fe3O4 magnetic microsphere
silane-coupling agents
ratio of magnetization
