物理化学学报 >> 2012, Vol. 28 >> Issue (09): 2202-2208.doi: 10.3866/PKU.WHXB201206292

材料物理化学 上一篇    下一篇

纳米Ag/CNTs复合材料的制备、表征及对环三亚甲基三硝胺热分解的影响

安亭1, 曹慧群2, 赵凤起1, 任晓宁1, 田德余2, 徐司雨1, 高红旭1, 谭艺1, 肖立柏1   

  1. 1. 西安近代化学研究所燃烧与爆炸技术重点实验室, 西安 710065;
    2. 深圳大学化学与化工学院, 深圳市新型锂离子电池与介孔材料重点实验室, 广东深圳 518060
  • 收稿日期:2012-03-09 修回日期:2012-06-29 发布日期:2012-08-02
  • 通讯作者: 曹慧群 E-mail:chq0524@163.com
  • 基金资助:

    国家自然科学基金(21173163)和燃烧与爆炸技术重点实验室基金(9140C3501041001)资助项目

Preparation and Characterization of Ag/CNTs Nanocomposite and Its Effect on Thermal Decomposition of Cyclotrimethylene Trinitramine

AN Ting1, CAO Hui-Qun2, ZHAO Feng-Qi1, REN Xiao-Ning1, TIAN De-Yu2, XU Si-Yu1, GAO Hong-Xu1, TAN Yi1, XIAO Li-Bai1   

  1. 1. Science and Technology on Combustion and Explosion Laboratory, Xi?an Modern Chemistry Research Institute, Xi?an 710065, P. R. China;
    2. Shenzhen Key Laboratory of New Lithium-ion Battery and Mesoporous Materials, College of Chemistry and Chemical Engineering, Shenzhen 518060, Guangdong Province, P. R. China
  • Received:2012-03-09 Revised:2012-06-29 Published:2012-08-02
  • Contact: CAO Hui-Qun E-mail:chq0524@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21173163) and Science and Technology Foundation of Science and Technology on Combustion and Explosion Laboratory, China (9140C3501041001).

摘要:

采用银镜法和水热法制备了两种纳米Ag/CNTs(碳纳米管)复合材料, 利用傅里叶变换红外(FTIR)光谱、粉末X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜及能量散射光谱仪(SEM-EDS)对复合物的物相、组成、形貌和结构进行分析表征, 并运用差示扫描量热法(DSC)研究了纳米Ag/CNTs 复合材料对环三亚甲基三硝胺(RDX)热分解特性的影响. 结果表明: 纳米Ag 以10-80 nm的不规则球形“粘附”于纳米CNTs 表面,分散较均匀, 水热法制得的复合物表面纳米Ag较大、且负载的Ag粒子较多; 纳米Ag/CNTs 复合材料的加入改变了RDX的热分解过程, 使原有占主导的液相分解变为二次的气相反应加剧, RDX主分解峰形发生了明显的改变; 纳米Ag/CNTs 复合材料对RDX热分解的催化主要表现为分解温度的降低.

关键词: 碳纳米管, 纳米复合物, 环三亚甲基三硝胺, 银镜法, 水热法, 热分解

Abstract:

Two kinds of Ag/CNTs (carbon nanotubes) nanocomposite materials were successfully prepared by silver mirror reaction and hydrothermal methods. Their physical phase, composition, morphology, and structure were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscope-energy dispersive spectrometry (SEM-EDS). Catalytic effects of the Ag/CNTs nanocomposite on the thermal decomposition of cyclotrimethylene trinitramine (RDX) were investigated by differential scanning calorimetry (DSC). Our results indicated that the irregularly globose nano-Ag particles attached to the surface of the nano CNTs evenly. The nanocomposite product prepared hydrothermally had the highest loading of nano-Ag particles and largest Ag particle size. Both Ag/CNTs nanocomposites influenced the thermal decomposition of RDX, changing the primary decomposition of the liquid phase to a secondary gas phase reaction and resulting in obvious change in the shape of the main decomposition peak. The catalytic effect of Ag/CNTs nanocomposite on the thermal decomposition of RDX was mainly exhibited at lower decomposition temperature.

Key words: Carbon nanotube, Nanocomposite, Cyclotrimethylene trinitramine, Silver mirror reaction, Hydrothermal method, Thermal decomposition

MSC2000: 

  • O643