|
|||||
|
|
A facile method to synthesize magnetic polymer nanospheres with multifunctional groups |
|
| Authors: | Xiaojuan Zhang Wei JiangYuanfeng Ye Zhiqiang FengZhendong Sun Fengsheng LiLingyun Hao Jianjun Chu |
| Institution: | a School of Material Engineering, Jinling Institute of Technology, Nanjing 211169, China b National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, Nanjing 210094, China c Fourth Affiliated Hospital of Soochow University, Wuxi 214062, China |
| Abstract: | Magnetic poly(styrene methyl methacrylate)/Fe3O4 nanospheres with ester groups were prepared by a modified one-step mini-emulsion polymerization in the presence of Fe3O4 ferrofluids. The effects of monomer dose, surfactant content, ferrofluid concentration and initiator content on the particle characteristics such as the size, morphology and magnetic properties were investigated by Fourier-transform infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis and vibrating sample magnetometer. The results indicated that magnetic nanospheres were superparamagnetic with high saturation magnetization of 51.0 emu/g and corresponding magnetite content of 61.5 wt%. Subsequently, magnetic nanospheres with carboxyl and amino groups were also obtained by hydrolysis and ammonolysis reaction. These magnetic nanospheres with multifunctional groups have biomedical applications. |
| Keywords: | Magnetic polymer nanosphere Mini-emulsion polymerization High saturation magnetization Multifunctional group |
| 本文献已被 ScienceDirect 等数据库收录！ | |