二硫化钼掺杂改性FOX⁃7含能复合材料的热分解特性  

Thermal Decomposition Properties of MoS_(2)⁃doped FOX⁃7 Energetic Composites

作　　者：许紫岚 蔚明辉 赵煦 聂福德[1] XU Zi-lan;YU Ming-hui;ZHAO Xu;NIE Fu-de(Institute of Chemical Materials,China Academy of Engineering Physics(CAEP),Mianyang 621999,China)

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621999

出　　处：《含能材料》2024年第1期31-37,共7页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(22105186,22375188)。

摘　　要：为了提高1,1‐二氨基‐2,2‐二硝基乙烯(FOX‐7)的热分解特性,在较低分解活化能下实现能量的快速释放,采用溶剂‐反溶剂的方法制备了掺杂改性的FOX‐7/MoS2含能复合材料。采用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、热重‐差示扫描量热仪(TG‐DSC)等分析测试手段对复合材料的形貌结构、物相组成、热分解特性、分解活化能进行了表征和测试。结果表明,掺杂改性的FOX‐7/MoS2含能复合材料既可以提高低温阶段的分解温度,又可以催化高温下的分解放热。其中,与原料相比,FOX‐7/MoS2‐5%的低温阶段的分解温度和分解活化能分别提高了6.8℃和78.6 kJ·mol^(-1);高温阶段的分解温度和分解活化能分别降低了23.4℃和340.4 kJ·mol^(-1)。热重‐质谱结果表明,高温阶段FOX‐7/MoS2‐5%产物中CO_(2)的比例从7.3%增加到16.8%,表明MoS_(2)的掺杂改性又促进了高温阶段的分解,使分解更加完全和充分。The achievement of rapid energy release at a low activation energy is vital for the improvement of the thermal decom‐position characteristics of 1,1‐diamino‐2,2‐dinitroethylene(FOX‐7).Herein,MoS_(2)doped FOX‐7(FOX‐7/MoS_(2))energetic com‐posites were prepared by the solvent‐antisolvent method.Scanning electron microscopy(SEM),energy dispersive spectrometer(EDS),X‐ray powder diffraction(XRD),X‐ray photoelectron spectroscopy(XPS),thermogravimetric‐differential scanning calorimeter(TG‐DSC)were employed to investigate the morphology,phase composition,thermal decomposition characteristics,and decomposition activation energy of composites.The doped FOX‐7/MoS_(2)energetic composites displayed improved decomposition temperature at low temperatures and fastened decomposition heat release at high temperatures.Compared with the raw material FOX‐7,the decomposition temperature and activation energy of FOX‐7/MoS_(2)‐5%during the low‐temperature stage increased by 6.8℃and 78.6 kJ·mol^(-1),respectively.The decomposition temperature and activation energy at the high temperature decreased by 23.4℃and 340.4 kJ·mol^(-1),respectively.The TG‐MS results showed that the proportion of CO_(2)in the FOX‐7/MoS_(2)‐5%increased from 7.3%to 16.8%at the high‐temperature stage,indicating a promoted and completed decomposition of FOX‐7 using the MoS_(2)dopant.

关 键 词：1 1‐二氨基‐2 2‐二硝基乙烯(FOX‐7) 二硫化钼(MoS_(2)) 热反应特性 分解动力学 催化分解 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]