| 含羧基磁性高分子微球的合成与表征 |
| Synthesis and Characterization of Magnetic Polymer Microspheres with Surface Carboxyl Groups |
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| 摘要: 在共沉淀法合成超细磁粉的基础上，以苯乙烯(St)和丙烯酸为共聚单体，以过氧化苯甲酰(BPO)为引发剂，用分散聚合法得到了含羧基的具有核壳结构的磁性高分子微球。采用XRD、TEM、SEM、IR等对样品进行了表征。表征结果表明：制备的磁粉为Fe3O4单相，磁粉的粒径为10 nm左右，微球粒径大约在1～5 μm，呈球形，微球中存在羧基。VSM磁性能测试结果表明：用PEG4000作为表面活性剂时，样品的磁性能最强。分散剂和分散介质对微球形貌和粒度均有影响。 |
| 关键词: 磁粉 磁性高分子微球 分散聚合法 磁性能 |
| 基金项目: |
| Abstract: The magnetic oxide (Fe3O4) was prepared by co-precipitation. Using BPO as the initiator, the core-shell composite magnetic polymer microspheres with carboxyl groups, were synthesized by dispersion copolymerization of styrene and acrylic acid in the presence of magnetic oxide and characterized by X-ray diffraction, transmission electron microscope, scan electron microscope, FTIR spectroscopy etc. The results indicate that the only product prepared by co-operation method was single-phase Fe3O4 and its diameter was about 10 nm. The microspheres with carboxyl groups was spherical and its diameter was about 1～5 μm. The results of VSM tests show that the sample′s magnetism is the strongest when using PEG4000 as the surface active reagent. |
| Keywords: magnetic powder magnetic polymer microsphere dispersion copolymerization method magnetism |
| 投稿时间：2004-10-10 修订日期：2004-11-29 |
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| 刘雪奇,曾红梅,赖琼钰,韦勇强,吉晓洋.含羧基磁性高分子微球的合成与表征[J].无机化学学报,2005,21(4):490-494. |
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