摘要
以表面包敷有反应型的表面活性剂NaUA(十一烯酸钠)的Fe3O4磁性胶体粒子为种子,运用无皂乳液聚合方法原位制备出Fe3O4P(NaUAStBA)核壳纳米磁性复合粒子.Fe3O4磁性胶体粒子的粒径为10nm左右.IR和TG结果分析表明,苯乙烯、丙烯酸酯和NaUA在Fe3O4粒子的表面发生了聚合反应,形成P(NaUAStBA);TEM和激光粒度分析仪测试结果显示,Fe3O4P(NaUAStBA)复合粒子具有核壳结构而且粒子分布均匀、平均粒径60nm;TG测试的结果表明,NaUA在Fe3O4粒子的包覆率为13.83%,P(NaUAStBA)共聚物的包覆率71.85%;振动样品磁强仪(VSM)测试的磁滞回线则表明由无皂乳液聚合得到的Fe3O4P(NaUAStBA)复合粒子具有超顺磁性,可避免磁性微球在磁场中的团聚.另外,合成的磁性胶乳可稳定存放数月.
Fe3O4/P （NaUA-St-BA） core-shell magnetic composite nanoparticles were prepared by soapless polymerization of styrene and butyl acrylate in the presence of Fe3O4 magnetic colloidal particles coated with a reactive surfactant NaUA and their diameter was about 10 nm. The results of IR and TG analysis demonstrated that the desired polymer was bonded to the surface of Fe3O4 particles. The morphology analysis by TEM confirmed that the composite particles had a core-shell structure and a relatively uniform diameter of about 60nm. The results of TG analysis indicated that the coating amount of NaUA and P（NaUA-St-BA） copolymer on Fe3O4 particles was 13.83 % and 71.85 % , respectively. The magnetic properties of the obtained composite particles were measured by VSM, and superparamagnetic properties was found. Finally, the prepared magnetic composite particles latexes were stable for several months.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2005年第4期606-610,共5页
Acta Polymerica Sinica
基金
国家自然科学基金(项目号50173010)
济南大学科技基金(项目号0411)资助项目
