| 引用本文: | 薛永萍,艾常春,汤璐,吴元欣.Fe3O4 包覆聚苯乙烯磁性微球的制备及性能[J].材料科学与工艺,2016,24(2):75-79.DOI:10.11951/j.issn.1005-0299.20160210. |
| XUE Yongping,AI Changchun,TANG Lu,WU Yuanxin.Preparation and properties of Fe3O4 coated polystyrene magnetic microspheres[J].Materials Science and Technology,2016,24(2):75-79.DOI:10.11951/j.issn.1005-0299.20160210. |
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| 摘要: |
| 为研究一种应用于磁稳定流化床反应器的新型高分子磁性微球的制备方法及性能，采用悬浮聚合法制备了Fe3O4纳米粒子包覆聚苯乙烯磁性微球，研究了搅拌速率、加入磁性Fe3O4纳米粒子的时间等因素对复合微球粒径及性能的影响，运用扫描电子显微镜(SEM)、X射线衍射(XRD)、振动样品磁强计(VSM)、热重(TGA)等测试手段，表征了磁性聚苯乙烯微球的形貌特征、结构、粒径、磁学性能及Fe3O4的包覆量.实验结果表明：在搅拌转速为600 r/min，80 ℃保温10 min加入修饰Fe3O4纳米粒子，制备所得的磁性聚苯乙烯微球为粒径分布均匀的球状微粒；Fe3O4的包覆量达到5%，最高饱和磁化强度为3.73 emu/g，具有较好的超顺磁性，可应用于磁稳定流化床反应器.
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| 关键词: 悬浮聚合 Fe3O4磁性纳米粒子 表面修饰 包覆 磁性聚苯乙烯微球 |
| DOI：10.11951/j.issn.1005-0299.20160210 |
| 分类号:TQ050.4 |
| 文献标识码:A |
| 基金项目:国家自然科学基金重点项目(20936003)；国家磷资源开发利用工程技术研究中心开放基金项目(2012-2001). |
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| Preparation and properties of Fe3O4 coated polystyrene magnetic microspheres |
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XUE Yongping1,2, AI Changchun1, TANG Lu2, WU Yuanxin1
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(1.School of Chemical Engineering ＆ Pharmacy, Wuhan Institute of Technology, Wuhan 430073, China; 2.College of Post and Telecommunication, Wuhan Institute of Technology, Wuhan 430073, China)
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| Abstract: |
| Aiming at investigate the preparation method and properties of a novel polymer magnetic microspheres, which could be used in magnetically stabilized fluidized bed reactor, Fe3O4 coated polystyrene magnetic microspheres were prepared by suspension polymerization in this study. The effects of the stirring rate, and the time of adding magnetic Fe3O4 nanoparticles on the particle sizes and properties of magnetic microspheres were studied. The morphology, microstructure, size, and magnetic properties of magnetic microspheres, and coating amount of Fe3O4 nanoparticles were characterized by using scanning electron microscope (SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and thermogravimetric analysis (TGA) etc. The results indicated that, . for the case of 600 rpm, and a holding time of 10 min at 80 ℃ followed by adding Fe3O4 nanoparticles, the obtained magnetic polystyrene exhibits a homogenenous size distribution. Under these parameters, the maximum content of Fe3O4 nanoparticles can reach up to 5% in nitrogen atmosphere, and the maximum saturation magnetization is 3.73 emu/g at room temperature. It is expected that the obtained magnetic polystyrene microspheres with excellent superparamagnetism can beused as the magnetically stabilized fluidized bed reactor.
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| Key words: suspension polymerization Fe3O4 magnetic nanoparticles surface modification coated magnetic polystyrene microspheres |
