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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (02): 127-131. 上一篇    下一篇

研究论文

SiO2纳米管的合成及表面功能修饰研究

邓志华*，石耀刚，王建华   

  1. (中国工程物理研究院化工材料研究所 绵阳 621900)
  • 投稿日期:2010-07-14 修回日期:2010-08-30 发布日期:2010-09-26
  • 通讯作者: 邓志华 E-mail:prodzh@sohu.com
  • 基金资助:

    中国工程物理研究院科学技术发展重点基金

Synthesis and Surface Modification of SiO2-Nanotubes

DENG Zhi-Hua, SHI Yao-Gang, WANG Jian-Hua   

  1. (Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900)
  • Received:2010-07-14 Revised:2010-08-30 Published:2010-09-26
  • Contact: Zhi-Hua DENG E-mail:prodzh@sohu.com
  • Supported by:

    The science & technology Fund of China Academy of Engineering Physics

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在氨水的负催化作用下, 用酒石酸氢铵作模板剂, 原硅酸四乙酯(TEOS)经水解、缩聚, 生成SiO2纳米管. 利用硅烷偶联剂KH-570对SiO2纳米管进行表面修饰, 将乙烯基(—CH＝CH2)引入SiO2纳米管表面, 改善其表面功能性. 通过扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)和傅立叶红外(FT-IR)等分析测试手段研究了SiO2纳米管的形貌结构及其表面修饰性能. 结果表明: 溶液的pH值是影响SiO2纳米管形貌的最主要因素, 最合适的酸碱度是4.5≤pH≤5.0; 纳米管平均外径300 nm, 内径100 nm, 长度10 µm以上, 管径均匀, 管壁表面光滑平坦, 没有出现裂纹等缺陷, 为无定形结构. KH-570功能修饰前后的纳米管形貌没有发生任何变化.

关键词: SiO2纳米管, 合成, 修饰, 表征

With ammonium bitartrate as templating agent and ammonia water as the negative catalyst, SiO2-nanotubes were synthesized by hydrolysis and polycondensation of tetraethyl orthosilicate (TEOS). The groups of —CH＝CH2 were grafted on the surface of SiO2-nanotubes successfully by the surface modification with silane coupling agent (KH-570) to improve the surface function. The morphology structure and surface modification performance of SiO2-nanotubes were examined by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectrometer (FT-IR). The results confirmed that the pH of the templating agent was the primary factor affecting the morphology of SiO2-nanotubes and the optimized pH is between 4.5 and 5.0. The diameters of tubes are uniform, and average outer and inner diameter of the SiO2-nanotubes are 300 and 100 nm, respectively. The lengths are over 10 μm. Smooth surface of the SiO2-nanotubes without obvious disfigurements was observed. The SiO2-nanotubes have amorphous structure. The morphology of nanotubes remained unchanged by modification with KH-570.

Key words: SiO2-nanotubes, synthesis, modification, characterization

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