物理化学学报 >> 2006, Vol. 22 >> Issue (02): 189-192.doi: 10.3866/PKU.WHXB20060212

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化学自组装法制备钡铁氧体亚微空心球

甘治平; 官建国   

  1. 武汉理工大学材料复合新技术国家重点实验室, 武汉 430070
  • 收稿日期:2005-07-21 修回日期:2005-10-08 发布日期:2006-01-22
  • 通讯作者: 官建国 E-mail:guanjg@mail.whut.edu.cn

Chemical Self-assembly Route to Fabricate Hollow Barium Ferrite Submicrospheres

GAN Zhi-ping; GUAN Jian-guo   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
  • Received:2005-07-21 Revised:2005-10-08 Published:2006-01-22
  • Contact: GUAN Jian-guo E-mail:guanjg@mail.whut.edu.cn

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摘要： 描述了一种基于化学自组装制备钡铁氧体亚微空心球的新颖方法, 即以聚(苯乙烯-共-丙烯酸)乳胶粒子为模板, 利用酸醇相互作用, 将在聚乙二醇水溶液中得到的钡铁氧体前驱物包覆在模板粒子上, 形成聚(苯乙烯-共-丙烯酸)/钡铁氧体前驱物核壳纳米复合粒子. 复合粒子经历750 ℃的热处理, 可获得主晶相为BaFe12O19的钡铁氧体亚微空心球. 该空心球有可能在微波吸收、电磁流变等领域得到重要应用.

关键词: 空心球, 钡铁氧体, 化学自组装, 聚(苯乙烯-共-丙烯酸), 核壳纳米复合粒子

Abstract: A novel strategy of preparing of hollow barium ferrite submicrospheres based on chemical self-assembly technique is described in this paper. That is, using poly (styrene-co-acrylic acid) latexes as template, the chemical interaction between the carboxyl groups on the latex surface and the hydroxyl groups on the surface of barium ferrite precursor prepared in poly-glycol solution results in the formation of poly(styrene-co-acrylic acid)/ barium ferrite precursors core-shell nanocomposite particles. Heat-treatment of the composite particles by upgrading temperature to 750 ℃ leads to hollow barium ferrite submicrospheres with BaFe12O19 crystal phase mainly. The products might find significant applications in such fields as radar absorbers or electro-magneto-rheological fluids.

Key words: Hollow spheres, Barium ferrite, Chemical self-assembly, Poly(styrene-co-acrylic acid), Core-shell nanocomposite particles