Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (19): 2151-2156. Previous Articles     Next Articles

Original Articles


张海燕 李保利 张绪宏 宿书芳 张 敏 董襄朝*


  1. (南开大学化学学院 天津 300071)

  • 投稿日期:2008-01-22 修回日期:2008-04-22 发布日期:2008-10-14
  • 通讯作者: 董襄朝

Preparation of Polymer-encapsulated Silica by Using the Living Radical Polymerization (iniferter) Method and Chromatographic Performance Evaluation

ZHANG, Hai-Yan LI, Bao-Li ZHANG, Xu-Hong SU, Shu-Fang
ZHANG, Min DONG, Xiang-Chao*

  1. (College of Chemistry, Nankai University, Tianjin 300071)
  • Received:2008-01-22 Revised:2008-04-22 Published:2008-10-14
  • Contact: DONG, Xiang-Chao

The living radical polymerization (iniferter) method was used to prepare the polymer-encapsulated silica as a chromatographic stationary phase. The 2-ethylhexyl methacrylate and ethylene dimethacrylate were polymerized and grafted on the silica surface by the initiation of the iniferter bound on the silica. The influence of the synthetic conditions on the polymer layers and the chromatographic separation was studied. The linear relation between the polymerization time and the amount of the polymer grafted on the silica in certain reaction period was observed. Meanwhile, polymer-encapsulated silica could be re-initialized for the successive grafting reaction, which showed the character of the living radical polymerization. The polymer-encapsulated silica has shown good separation ability and column efficiency for the alkylbenzene, alkaline compounds and hydroxybenzoate. The alkaline compounds have small peak tailings on the polymer-encapsulated silica stationary phase, which indicated that silanol groups on the silica surface were effectively covered by the polymer layer. The work provided a new method for the synthesis of polymer-encapsulated silica.

Key words: polymer-encapsulated silica, living radical polymerization, iniferter, chromatographic stationary phase