物理化学学报 >> 2001, Vol. 17 >> Issue (06): 507-510.doi: 10.3866/PKU.WHXB20010607

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磁性Fe3O4微粒表面有机改性

施卫贤;杨俊;王亭杰;金涌   

  1. 清华大学化学工程系,北京　100084
  • 收稿日期:2000-12-14 修回日期:2001-02-06 发布日期:2001-06-15
  • 通讯作者: 王亭杰 E-mail:wangtj@mail.tsinghua.edu.cn

Surface Organic Modification of Magnetic Iron Oxide Black Particles

Shi Wei-Xian;Yang Jun;Wang Ting-Jie;Jin Yong   

  1. Department of Chemical Engineering,Tsinghua University,Beijing　100084
  • Received:2000-12-14 Revised:2001-02-06 Published:2001-06-15
  • Contact: Wang Ting-Jie E-mail:wangtj@mail.tsinghua.edu.cn

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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Fe3O4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,Fe3O4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.

关键词: 复合微球, 改性, 磁性微粒, Fe3O4, 偶联剂

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 μm 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.

Key words: Encapsulated magnetic micro-spheres, Modification, Magnetic particle, 　Fe3O4, Coupling agents