纳米四氧化三铁/埃洛石复合材料及水基磁性流体的制备  

Preparation of Fe_3O_4/halloysite nanotubes composites and aqueous magnetic fluid

作　　者：贾佩楠[1] 马媛媛[1] 肉斯坦木.热合曼 马亚鲁[1] 

机构地区：[1]天津大学理学院化学系,天津300072

出　　处：《功能材料》2011年第3期540-542,共3页Journal of Functional Materials

基　　金：国家自然科学基金面上资助项目(50972103);教育部留学回国人员启动基金资助项目(2009D4-0010)

摘　　要：以天然埃洛石纳米管(HNTs)为载体,采用部分还原共沉淀法,在HNTs的管内、外沉积Fe3O4纳米晶粒。利用HNTs独特的空间结构,所制备的Fe3O4粒子尺寸为10～30nm,并有效控制其粒子团聚。XRD表明Fe3O4/HNTs复合材料为Fe3O4和埃洛石两相组成,不同温度(373、423、523K)热处理条件下该复合材料具有良好的热稳定性;VSM表明Fe3O4/HNTs复合材料为超顺磁性材料。并对纳米Fe3O4/HNTs复合材料进行表面化学改性,得到分散性良好的水基磁性流体。Magnetic Fe3O4 nanoparticles were deposited on the inner and outer surfaces of natural halloysite nanotubes（HNTs） by reduction co-precipitation method.By means of special nanotubal structures of HNTs,Fe3O4 nanoparticles were homogeneously dispersed on its surfaces with particle sizes distribution of 10-30nm in diameter,in which aggregation of Fe3O4 nanoparticles was controlled effectively.Powder X-ray diffraction（XRD） results showed that Fe3O4/HTNs composites were composed of Fe3O4 and halloysites phase structures,which were stabilized in different heat treatment temperature of 373,423 and 523K.Vibrating-sample magnetometer（VSM） confirmed the superparamagnetic of the Fe3O4/HTNs composites.Aqueous magnetic fluids with good dispersibility were obtained by chemical modification on the surfaces of Fe3O4/ HTNs composites.

关 键 词：纳米Fe3O4/HNTs复合材料 团聚控制 超顺磁性材料 水基磁性流体 

分 类 号：TM271[一般工业技术—材料科学与工程] TQ050.43[电气工程—电工理论与新技术]