摘要
用化学共沉淀法制备了磁性四氧化三铁纳米粒子.在油酸和氨水的作用下,使之分散在水中,得到了水分散的磁流体.在水基磁流体的存在下,进行苯乙烯和甲基丙烯酸缩水甘油酯(GMA)的无皂乳液共聚合,得到了Fe3O4@P(St-GMA)复合微球.综合考察了反应温度、磁流体和单体的用量、引发剂的用量对聚合转化率的影响,并用TEM,TGA和VSM对磁性复合微球进行了表征.
Magnetic iron oxide nanoparticles were prepared by chemical coprecipitation of ferrous and ferric salts in the alkaline medium, and water-dispersed magnetic fluids were achieved by dispersing the nanoparticles into the aqua ammonia solution of oleic acid, then magnetic Fe3O4@P（St-GMA） microspheres were achieved by soap-free emulsion polymerization of styrene and glycidyl methacrylate in the presence of magnetic fluids. The effecting factors to the fractional conversion of polymerization such as styrene content, ferrofluid content, initiator content and temperature, were examined in detail. To confirm the iron oxide nanoparticles were encapsulated by P（St-GMA）, one sample selected was characterized by TEM, TGA and VSM.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2010年第18期1930-1934,共5页
Acta Chimica Sinica
基金
上海市高校优青项目(No.gjd08003)
上海工程技术大学科研启动基金(No.校启08-23)
大学生创新计划项目(Nos.CX0904005
CX1004003)资助项目
关键词
化学共沉淀法
无皂乳液共聚合
转化率
磁流体
磁性微球
chemical coprecipitation
soap-free emulsion co-polymerization
conversion
magnetic fluids
magnetic microspheres
