Preparation and Thermal Decomposition Characteristics of TKX-50/GO Composite Energetic Materials

WANG Hua-yu,CAO Xiong,WU Jing-li,XU Ya-bei,SHANG Yi-ping

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Chinese Journal of Explosives & Propellants ›› 2020, Vol. 43 ›› Issue (6) : 631-635. DOI: 10.14077/j.issn.1007-7812.201908021

Preparation and Thermal Decomposition Characteristics of TKX-50/GO Composite Energetic Materials

  • WANG Hua-yu,CAO Xiong,WU Jing-li,XU Ya-bei,SHANG Yi-ping
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Abstract

In order to study the thermal decomposition properties of 5,5'-bistetrazole-1,1'-diolate(TKX-50)/graphene oxide(GO)nano-composite energetic materials, liquid nitrogen-assisted spray freeze-drying method was used to prepare TKX-50/GO composite materials. The morphology, structure and surface element of the samples were characterized and analyzed by using the scanning electron microscopy-energy spectroscopy(SEM-EDS)and X-ray diffraction(XRD). The thermal decomposition properties of composites were analyzed by using the thermogravimetry-differential scanning calorimetry(TG-DSC). The apparent activation energy was calculated by using the Kissinger method. The results show that the TKX-50/GO composite prepared by liquid nitrogen-assisted freeze spray drying method has nano-scale layered network structure. Compared to the TKX-50, the first stage decomposition peak temperature of TKX-50/GO composite energetic material decreases by 12.0, 12.5 and 12.2℃, and the second stage decomposition peak temperature decreases by 12.5℃ and 16.4℃. With the increase of GO content, the decomposition peak in the second stage is not obvious, and the two decomposition stages of TKX-50/GO5 are overlapped. The apparent activation energy of the nano-composite materials increases from 146.2kJ/mol to 163.3, 168.5 and 172.9kJ/mol compared to the TKX-50, respectively. GO improves the activation energy barrier of the composite energetic material, decreases the decomposition peak temperature and shortens the reaction interval time, so the GO improves the energy release rates and promotes the thermal decomposition of TKX-50/GO composite materials.

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physical chemistry / graphene oxide(GO) / 5,5'-bistetrazole-1,1'-diolate / TKX-50 / network-like nanostructures / composite energetic material / thermal decomposition

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WANG Hua-yu,CAO Xiong,WU Jing-li,XU Ya-bei,SHANG Yi-ping. Preparation and Thermal Decomposition Characteristics of TKX-50/GO Composite Energetic Materials. Chinese Journal of Explosives & Propellants. 2020, 43(6): 631-635 https://doi.org/10.14077/j.issn.1007-7812.201908021

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