纳米铁酸锌/丙氨酸改性聚乳酸复合磁性微球的制备和表征（英文）
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| Published in | 中国有色金属学报：英文版 Vol. 22; no. 2; pp. 360 - 365 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
2012
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1003-6326 |
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| Bibliography: | Magnetic nano zinc ferrite fliuds were synthesized using an improved liquid phase chemical method, which would be used to replace tradditional iron oxides magnetic material. A novel copolymer （PLAA） with D, L-lactide （D, L-LA） and alanine was synthesized using stannous octoate as initiator. Magnetic polymer microspheres were fabricated with nano zinc ferrite fluid coated with alanine modified poly lactide. These as-prepared zinc ferrite fluids, modified poly lactide and magnetic composites, were characterized with X-ray diffraction diffractometer, FT-IR spectrometer, nuclear magnetic resonance spectrometer, scanning electron microscope, transmission electron microscope, vibrating sample magnetometer, and thermogravimetric analyzer. The results demonstrate that the as-prepared zinc ferrite is spinel type of ZnFe2O4 nano crystals with particle size of 20-45 nm and magnetization of 32×10^-3 A.m2. Alanine is copolymerized with lactide, and the prepared composite magnetic microsphere is coated with the modified polylactide, with mass fraction of 45.5% of PLA, particle size ranging from 80-300 nm, and magnetization of 10.6×10^-3 A·m^2, which suggests ZnFe2O4 enjoys a stable magnetization after being coated by polymer. 43-1239/TG zinc ferrite; alanine; polylactide; magnetic composite microsphere CAO Lei-jian1, ZHOU Qing-hua2, GU Li3, SHEN Hong-xia3, LI Qing-hua1, LAN Ping3, FANG Yan3 1. School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China; 2. College of Medicine, Jiaxing University, Jiaxing 314001, China; 3. Institute of Polymer Material Engineering, Jiaxing University, Jiaxing 314001, China |
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| ISSN: | 1003-6326 |