| 磁性Fe_3O_4微粒表面有机改性 |
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| 引用本文： | 施卫贤,杨俊,王亭杰,金涌. 磁性Fe_3O_4微粒表面有机改性[J]. 物理化学学报, 2001, 17(6) |
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| 作者姓名： | 施卫贤 杨俊 王亭杰 金涌 |
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| 作者单位： | 清华大学化学工程系 , |
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| 基金项目： | 国家自然科学基金资助项目 (29906004)，学校博士学科点专项科研基金项目 (99000331) |
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| 摘 要： | 在分散聚合法制备复合磁性微球过程中 ,采用硅烷偶联剂 KH- 570对磁性 Fe_3O_4微粒进行表面改性 .红外光谱 (FTIR)、光电子能谱 (XPS)分析结果表明 ,偶联剂与磁性微粒表面以化学键形式结合 .改性后 ,Fe_3O_4微粒与单体及其聚合物之间具有良好的亲和性 ,采用改性后的磁性微粒可以显著改善磁性微球的性能指标 .
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| 关 键 词： | 复合微球 改性 磁性微粒 Fe_3O_4 偶联剂 |
Surface Organic Modification of Magnetic Iron Oxide Black Particles* |
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| Shi Wei-Xian,Yang Jun,WANG Ting-jie,Jin Yong. Surface Organic Modification of Magnetic Iron Oxide Black Particles*[J]. Acta Physico-Chimica Sinica, 2001, 17(6) |
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| Authors: | Shi Wei-Xian Yang Jun WANG Ting-jie Jin Yong |
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| Abstract: | The affinity between magnetic particles (Fe3O4) and monomer or its polymer is a key factor affecting the function of micro spheres in the preparation of encapsulated magnetic micro-spheres(EMMS).Silane coupling[KH 570,CH2C(CH3)C(O)OC3H6Si(OCH3)3] was used for the surface modification of fine magnetic particles with 0.2～ 0.3 μ m in size and tetrahedron in crystal form.Ethanol/water solution was used as modification medium for silane coupling.Fourier transform infrared spectrometer and X ray photoelectron spectra analysis show that the coupling bonds chemically on the particle surface,leading to the affinity improvement between magnetic particles and monomer or its polymer.The encapsulated magnetic microspheres synthesized by dispersion polymerization of styrene in the presence of modified Fe3O4 particles are significantly improved compared with that when unmodified Fe3O4 particles are used. |
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| Keywords: | Encapsulated magnetic micro- spheres Modification Magnetic particle Fe_3O_4 Coupling agents |
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