| 高Fe_3O_4含量单分散P(St/AA)复合微球的合成与表征 |
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| 引用本文： | 贺枰,崔陇兰,强伟丽,徐宏,古宏晨.高Fe_3O_4含量单分散P(St/AA)复合微球的合成与表征[J].高分子学报,2007(8):731-736. |
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| 作者姓名： | 贺枰 崔陇兰 强伟丽 徐宏 古宏晨 |
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| 作者单位： | 上海交通大学微纳科学技术研究院,微米/纳米加工技术国家重点实验室,薄膜与微细技术教育部重点实验室,上海,200030 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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上海市纳米科技专项基金 |
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| 摘 要： | 在表面由十一烯酸和油酸共同修饰的Fe3O4磁流体存在下,以苯乙烯(St)和丙烯酸(AA)为共聚单体,用细乳液聚合法,制备了单分散,高Fe3O4含量,且表面带有羧基的超顺磁性高分子复合微球.采用透射电镜(TEM),热重分析(TGA),物性测量系统(PPMS),Zeta电位以及红外光谱等手段对磁性复合微球的各项性能进行表征.结果表明,Fe3O4粒子的表面改性是影响复合微球Fe3O4含量及形貌的关键因素.在优化的实验条件下,可以制得Fe3O4含量高达77wt%,平均粒径为137·9nm,表面羧基密度0·0894mmol/g,比饱和磁化强度为44·7emu/g的单分散超顺磁性高分子复合微球.
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| 关 键 词： | 细乳液 超顺磁性 复合微球 羧基 表面改性 |
| 修稿时间： | 2006-09-152006-11-29 |
PREPARATION AND CHARACTERIZATION OF MONODISPERSE P(St/AA) =COMPOSITE MICROSPHERES WITH HIGH Fe3O4 CONTENT |
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| HE Ping,CUI Longlan,QIANG Weili,XU Hong,GU Hongchen.PREPARATION AND CHARACTERIZATION OF MONODISPERSE P(St/AA) =COMPOSITE MICROSPHERES WITH HIGH Fe3O4 CONTENT[J].Acta Polymerica Sinica,2007(8):731-736. |
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| Authors: | HE Ping CUI Longlan QIANG Weili XU Hong GU Hongchen |
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| Institution: | National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiaotong University, Shanghai 200030 |
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| Abstract: | Monodisperse carboxylated superparamagnetic polymer composite microspheres with high magnetite content were prepared by miniemulsion copolymerzation,in which acrylic acid and styrene were used as polymeric monomers,and Fe_3O_4 microparticles were costabilized by undecylenic acid /oleic acid.Extensive characterizations by transmission electron microscopy(TEM),Zeta-sizer,thermogravimetric analysis(TGA),fourier transform infrared spectrometer(FTIR) and physical property meaturement system(PPMS) showed that the surface modification of Fe_3O_4 microparticles played an important role in controlling the magnetite content and the morphology of the composite microspheres.Under optimized experimental conditions,the superparamagnetic polymer composite microspheres with diameter of 137.9 nm,high magnetite content(77 wt%) and 0.0894 mmol carboxyl groups/g microspheres were successfully produced. |
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| Keywords: | Miniemulsion polymerization Superparamagnetic Composite microspheres Carboxyl group Surface modification |
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