Yan Zhu

Publications (3)3.89 Total impact

• Article: Synthesis and Characterization of Novel Polyurethane Composites Based on Hybrid Inorganic/Organic Phosphazene‐Containing Microspheres

  Yubo Zhou, Xiaobin Huang, Xiaoqi Kang, Jianwei Fu, Yan Zhu, Xiaozhen Tang
  Macromolecular Materials and Engineering 08/2009; 294(9):605 - 610. · 1.99 Impact Factor
• Article: Preparation of novel hybrid inorganic–organic hollow microspheres via a self‐template approach

  Yan Zhu, Jianwei Fu, Lu Zhu, Xiaozhen Tang, Xiaobin Huang
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  ABSTRACT: BACKGROUND: Hollow microspheres, especially biodegradable polymeric microspheres, have attracted considerable attention due to their particular characteristics. Up to now, microspheres have been prepared via various strategies, for instance the template synthesis method and the self-assembly process. However, economic, novel and simple methods to prepare hollow microspheres are still being sought.RESULTS: Phosphazene-containing microspheres, which contain self-assembled core-shell structures, were prepared at high colloid contents using an ultrasonic bath via a self-template approach. Along with the controlled self-degradation of the internal core, the corresponding hybrid inorganic–organic hollow microspheres appeared. The mechanism was evidenced by means of transmission and scanning electron microscopy, cross-polarization with magic angle spinning NMR, Fourier transform infrared spectroscopy, X-ray diffraction and thermogravimetric analysis.CONCLUSION: It was clarified that the phosphazene-containing microspheres could be formed and stably dispersed without aggregation even at high colloid contents using the ultrasonic bath method and the microspheres contain self-assembled core–shell structures. Along with the controlled self-degradation of the internal core, the corresponding hollow microspheres appeared. The mechanism of this preparation is of great significance because it is completely different from the conventional template synthesis method and the self-assembly process. The absence of any stabilizing agent and special templates might inspire creative imagination in the design of new morphologies of micro- and nanostructures. Copyright © 2007 Society of Chemical Industry
  Polymer International 10/2007; 57(3):449 - 453. · 1.90 Impact Factor
• Article: Preparation of novel hybrid inorganic–organic microspheres with active hydroxyl groups using ultrasonic irradiation via one-step precipitation polymerization

  Yan Zhu, Xiaobin Huang, Wenzhu Li, Jianwei Fu, Xiaozhen Tang
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  ABSTRACT: Monodisperse cyclotriphosphazene containing microspheres with active hydroxyl groups were prepared via a simple, economic and environmentally friendly route, one-step precipitation polymerization. The resulting polymer particles had spherical shapes and smooth surfaces with narrow particle dispersal. From the FTIR spectra and the result of elemental analysis, it was obvious that the content of the hydroxyl groups on the surface was depended upon the feed ratio. The successful esterification with benzoxy chloride demonstrated the high active of the hydroxyl groups on the poly (cyclotriphosphazene-co-4,4′-sulfonyldiphenol) (PZS) microspheres' surface. This interesting approach might open a novel, simple and economic route to preparing the functional microspheres.
  Materials Letters.