高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (1): 5.

• 论文 • 上一篇    下一篇

嵌段共聚物反介观液晶相新方法合成多级有序排列的二氧化硅纳米棒

余承忠, 田博之, 范杰, 屠波, 赵东元   

  1. 复旦大学化学系, 上海 200433
  • 收稿日期:2001-10-18 出版日期:2003-01-24 发布日期:2003-01-24
  • 通讯作者: 赵东元(1963年出生),男,博士,教授,博士生导师.从事分子筛合成研究.E-mail:dyzhao@fudan.edu.cn E-mail:dyzhao@fudan.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29925309,29873012);“973”国家重点基础研究基金(批准号:G2000048001);上海科委纳米专项基金(批准号:0152nm029)资助

Synthesis of Hierarchically Arrayed Silica Nanorods via Reverse Amphiphilic Block Copolymer Mesophases

YU Cheng-Zhong, TIAN Bo-Zhi, FAN Jie, TU Bo, ZHAO Dong-Yuan   

  1. Department of Chemistry, Fudan University, Shanghai 200433, China
  • Received:2001-10-18 Online:2003-01-24 Published:2003-01-24

PDF (PC)

被引次数

42

摘要： 在非极性溶剂体系中,开辟了利用反相液晶法制备多级有序纳米材料的新方法.利用嵌段共聚物表面活性剂在非极性溶剂中形成反相胶束,无机硅物种可以进入胶束的内部,在溶剂挥发后,有机-无机物种进一步组装成为反相六方液晶相.除去模板剂后即制备出尺寸规则的二氧化硅纳米棒材料.由于嵌段高分子的作用,六方排列的二氧化硅纳米棒进一步排列成层状结构(层间距约150nm).通过选择表面活性剂及改变其浓度,纳米棒的尺寸可以在9～15nm范围内调变.该反应途径对于合成其它尺寸均一、多级有序排列的纳米棒材料是非常有意义的.

关键词: 合成, 嵌段共聚物, 二氧化硅, 纳米棒

Abstract: A reverse amphiphilic mesophases approach to create hierarchically arrayed silica nanorods has been demonstrated. In nonpolar solvent systems, the cylinder nanorods with a uniform diameter(10 nm) generated from highly ordered two-dimensional(2D) reverse hexagonal mesophases are aligned within lamellar macrostructures(150 nm). The diameter size of silica nanorods can be adjusted from 9 to 15 nm by varying the chain length of the EO segment and the concentration of the surfactants. Low surfactant concentration and long hydrophilic EO segment chain yield silica nanorods with a large diameter. The calcined material has a relatively small surface area of 275 m2/g. This approach may provide a new pathway to the fabrication of nano-objects that might be applied in nanoscale devices.

Key words: Synthesis, Block copolymer, Silica, Nanorod

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