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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10-80nm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.
Two kinds of nano-Ag / CNTs (carbon nanotube) composites were prepared by silver mirror and hydrothermal method. Their structures were characterized by Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), transmission electron microscopy (TEM) The phase, composition, morphology and structure of the composites were characterized by scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS). The effects of nano-Ag / CNTs composite on the ring (TNX) on the thermal decomposition properties of RDX.The results showed that the nano-Ag dispersed in the surface of nano-CNTs with irregular spherical shape of “10-80nm” The surface nano-Ag is larger and more Ag particles are loaded. The addition of nano-Ag / CNTs composite changes the thermal decomposition process of RDX, which aggravates the gas phase reaction that the former dominant liquid phase decomposes into the second. The peak shape of the decomposed peaks changed obviously. The catalytic activity of nanostructured Ag / CNTs composites on RDX decomposition was mainly due to the decrease of decomposition temperature.