摘要
以水为载液,聚乙二醇(PEG)为表面活性剂,采用磁性粒子制备与表面活性剂包裹同时进行的方法,制备了纳米PEG/Fe3O4磁流体,并且分析了PEG浓度对产物微观形貌和粒径的影响.研究表明,PEG浓度是影响产物形貌和粒径的重要因素,改变PEG浓度,可制得球状和棒状产物.进一步的研究表明,内层的Fe3O4与外层的PEG之间存在物理吸附作用和氢键键合.
Nano-scale ferrofluids of PEG (polyethylene glycol)/Fe3O4 were prepared via the technology for synchronously preparing magnetic particles and covering surfactant and using water as the working fluid and PEG as the surfactant, and the effect of PEG content on the micromorphology and size of PEG/Fe3O4 colloidal particles in ferrofluids was investigated. The results indicate that the micromorphology and size of colloidal particles are obviously influenced by PEG content in the reaction system, and products with a shape of sphere or bar can be prepared by changing PEG concentration. A further study shows that there exist the interactions, of physical adsorption and hydrogen bonding between Fe3O4 particles and PEG.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2004年第6期805-808,共4页
Journal of Southwest Jiaotong University
基金
国家863计划资助项目(2003AA305310)
关键词
纳米磁流体
聚乙二醇
四氧化三铁
磁性胶体粒子
nano-scale ferrofluids
polyethylene glycol
Fe3O4
magnetic colloidal particle
