无水乙醇对双层油酸包覆结构中物理吸附层的影响  

Influence of ethanol on the physically absorpted layer of bilayer oleic acid-coated structure

作　　者：杨坤[1] 彭华备[1] 文玉华[1] 

机构地区：[1]四川大学制造科学与工程学院

出　　处：《功能材料与器件学报》2010年第4期363-368,共6页Journal of Functional Materials and Devices

基　　金：教育部新世纪优秀人才基金项目(No.NCET-06-0793)

摘　　要：研究了无水乙醇洗涤次数对油酸包覆的Fe3O4磁性纳米颗粒表面包覆结构的影响。采用FT-IR和TGA联合表征了油酸包覆的Fe3O4磁性纳米颗粒经过无水乙醇洗涤前后表面包覆结构的变化,采用TEM观察了油酸包覆后Fe3O4磁性纳米颗粒的形貌。实验结果表明经过无水乙醇5次洗涤后,油酸包覆的Fe3O4磁性颗粒为双层包覆结构;经过无水乙醇20次洗涤后,无水乙醇将双层油酸包覆结构中的物理吸附层洗掉,造成双层油酸包覆的Fe3O4磁性颗粒演变为单层包覆结构。The effect of washing by ethanol for different times on the surface structure of oleic acid-coated Fe3O4 nanoparticles was studied.The FT-IR and TGA were used together to study the evolution of surface structure of oleic acid-coated Fe3O4 nanomagnetic particles.TEM were used to study the morphology of the Fe3O4 magnetic nanoparticles after coated.The results showed that after five times washing,the bilayer oleic acid-coated structure was attained,while after twenty times washing,the physically absorbed secondary layer was washed away by the ethanol and the bilayer oleic acid-coated structure evolved into the single layer.

关 键 词：Fe3O4磁性颗粒 无水乙醇 油酸 单层包覆结构 双层包覆结构 

分 类 号：O648.11[理学—物理化学]