摘要
用化学共沉淀方法制备了 Fe3O4 纳米微粒 ,并用油酸 (十八烯酸 )和十二烷基苯磺酸钠为双层表面活性剂进行表面修饰 ,制备了稳定的水分散性纳米 Fe3O4 可聚合磁流体 .在 Fe3O4 磁流体存在下 ,将苯乙烯与甲基丙烯酸通过乳液聚合方法制备了磁性高分子微球 .透射电镜研究表明 ,Fe3O4 微粒的平均粒径在 1 0 nm左右 ,乳液聚合形成的磁性高分子微球的粒径平均约为 1 3 0 nm;用超导量子干涉仪对微粒及高分子微球进行了磁性表征 ,结果表明 ,合成的 Fe3O4 纳米微粒以及磁性高分子微球均具有超顺磁性 .同时 ,还用红外光谱及 X射线衍射表征了磁性高分子微球的化学成分和晶体结构 .用热失重方法测得磁性高分子微球中磁性物质的含量为 2 3 .6% .
The magnetic nanoparticles were synthesized by the chemical coprecipitation of ferrous chloride and ferric chloride. The obtained magnetic nanoparticles were coated with double surfactant. The magnetic polymer microspheres were prepared by emulsion polymerization by using styrene and methylacrylic acid as the monomer with the existence of magnetic fluid. TEM, FTIR, XRD, TGA and SQUID were used to characterize the size, component, magnetic percentage and magnetic property of the obtained microspheres. The content of magnetite in microspheres is 23.6%; The average size of magnetic fluid was 10 nm, and that of magnetic microsphere was 130 nm. The magnetic fluid and magnetic microsphere were found to show a superparamagnetic property.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第2期366-369,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金 (批准号 :2 0 0 3 40 0 62 )资助
