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Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (5): 435-441. Previous Articles     Next Articles

Original Articles

静电层层自组装制备聚苯乙烯微球(核)/MCM-41纳米粒子(壳)阶层结构复合微粒

杜 鑫a,b 刘湘梅a,b 郑 奕a 贺军辉*,a

  

  1. (a中国科学院理化技术研究所功能纳米材料实验室 北京 100190)
    (b中国科学院研究生院 北京 100049)

  • 投稿日期:2008-07-22 修回日期:2008-10-20 发布日期:2009-03-14
  • 通讯作者: 贺军辉

Preparation of Hierarchical Polystyrene Microsphere (Core)/MCM-41 Nanoparticle (Shell) Composite Particles via Electrostatic Layer-by-layer Assembly

Du, Xin a,b Liu, Xiangmei a,b Zheng, Yi a He, Junhui *,a

  

  1. (a Functional Nanomaterials Laboratory, Technical Institute of Physics and Chemistry,
    Chinese Academy of Sciences, Beijing 100190)
    (b Graduate University of Chinese Academy of Sciences, Beijing 100049)
  • Received:2008-07-22 Revised:2008-10-20 Published:2009-03-14
  • Contact: He Junhui

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MCM-41 Nanoparticles were successfully coated on the surface of polystyrene (PS) microspheres via electrostatic layer-by-layer assembly by using two polyelectrolytes, i.e., sodium poly(4-styrenesulfonate) (PSS) and poly(diallyldimethylammonium) (PDDA). The experimental results showed that when monodisperse PS microspheres of ca. 1.4 μm in diameter were used as core, composite microparticles coated with two prime polyelectrolyte bilayers (PDDA/PSS)2, i.e., PS(PDDA/PSS)2(PDDA/MCM-41), aggregated to a less extent than those coated with a single prime polyelectrolyte bilayer (PDDA/PSS), i.e., PS(PDDA/PSS)(PDDA/MCM-41). However, the covering of MCM-41 nanoparticles was incompact on the surface of PS microspheres in both cases, and there were many impurities in the final products. When monodisperse PS microspheres of 5 μm in diameter were used as core, MCM-41 nanoparticles were densely coated on the surface of PS microspheres.

Key words: composite microparticle, polystyrene microsphere, MCM-41 nanoparticle, electrostatic layer-by-layer assembly