摘要
采用部分还原沉淀法制备了Fe_3O_4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,-NH_2,-NH,-C=O,-C=C等多种有机功能基团。
Magnetic microspheres were prepared through partial reduction-precipitation method. The surface of particles was modified by silane-coupling agents. The structure and properties of these magnetic microspheres were characterized by X-ray, TEM, AFM, IR, etc. The magnetic nanoparticles modified by silane-coupling agents present favorable dispersibility, responsibility to magnetism and resist against the corrosion of acid or alkali solution. The results of investigation on modified nanoparticles with different silane-coupling agents also indicate that the particles have multi functional organic groups on their surface, such as -OH, -NH2, -NH, -C=0, -C=C.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2004年第5期494-498,共5页
Chinese Journal of Materials Research
基金
国家自然科学基金50272041
上海市科委纳米专项发展基金0144nm064
