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Ni/PSt/TiO2多层芯-壳结构电磁响应

郭红霞; 刘根起; 宁光辉; 赵晓鹏   

  1. 西北工业大学电流变技术研究所 西安 710072
  • 收稿日期:2002-07-15 修回日期:2002-09-09 出版日期:2003-07-20 网络出版日期:2003-07-20

Preparation of Ni/PSt/TiO2 Multiply Coated Spheres Responsive to Electric and Magnetic Fields

GUO Hong-Xia; LIU Gen-Qi; NING Guang-Hui; ZHAO Xiao-Peng   

  1. Institute of Electrorheological Technology; Department of Applied Physics; Northwestern Polytechnical University; Xi an 710072; China
  • Received:2002-07-15 Revised:2002-09-09 Published:2003-07-20 Online:2003-07-20

摘要: 制得了粒径均匀、兼有电磁响应的镍/聚苯乙烯/二氧化钛(Ni/PSt/TiO2)三层核-壳结构的复合微球。用红外光谱、X射线衍射及透射电镜对微球进行了表征,研究了包覆前后微粒的沉降性、导电性、耐蚀性、热稳定性以及在电、磁场作用下的运动。结果表明,所制得的镍/聚苯乙烯/二氧化钛(Ni/PSt/TiO2)复合微球对电磁场有良好的响应性,在相互垂直的电场与磁场作用下排列形成了一种网状花样结构,为利用电、磁场调控排列粒子成三维有序结构提供基础。

关键词: 镍/聚苯乙烯/二氧化钛, 核-壳结构, 包覆, 电、磁响应

Abstract: The multiply coated Ni/PSt/TiO2 spheres with uniform size, high refractive index and easily assembling
property by electric and magnetic fields were prepared. The multilayer complex spheres consisted of a modified nickel colloidal sphere as the core,
a polymer polystyrene coating, and an outermost coating of titania. The prepared Ni/PSt/TiO2 multilayer composite spheres were characterized by
FT-IR, XRD, TEM, etc. Also, the composite particles showed well responses to electric and magnetic fields which were reflected by the formation of
network structure under electric and magnetic fields superimposed in the perpendicular.

Key words: multilayer coated Ni/PSt/TiO2 spheres, core-shell structure, coating, electric and magnetic responses

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