采用部分还原沉淀法制备了Fe3O4磁性微球,并用硅烷偶联剂对其进行了表面修饰.利用X-射线衍射(XRD)、透射电子显微镜(TEM)、原子力显微镜(AFM)、红外光谱(IR)和分光光度计等手段对其结构和性能进行了表征和测量,研究了硅烷偶联剂对磁性纳米微球性能的影响.结果表明,修饰后的磁性纳米微球具有良好的分散性和磁响应性,并且在强酸环境中具有良好的稳定性.经不同硅烷偶联剂修饰后的微球表面可带有-OH,-NH2,-NH,-C=O,-C=C等多种有机功能基团.
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