十四面体氧化铁/石墨烯纳米复合材料的制备及对CL-20热分解性能的影响  

Preparation of tFe_(2)O_(3)/rGO Nanocomposites and Its Catalytic Effect on the Thermal Decomposition of CL-20

作　　者：党佳 高蓉[1] 张婷 马海霞[1] DANG Jia;GAO Rong;ZHANG Ting;MA Hai-xia(School of Chemical Engineering&Xi′an Key Laboratory of Special Energy Materials,Northwest University,Xi′an 710069,China;School of Chemistry and Chemical Engineering,Yan′an University,Yan′an Shaanxi 715700,China)

机构地区：[1]西北大学化工学院&西安市特种能源材料重点实验室,陕西西安710069 [2]延安大学化学化工学院,陕西延安715700

出　　处：《火炸药学报》2021年第6期761-768,共8页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.21373161)。

摘　　要：采用水热法合成出十四面体氧化铁,然后自组装制备出十四面体氧化铁/石墨烯纳米复合材料(tFe_(2)O_(3)/rGO);采用X-射线粉末衍射仪(XRD)、X-射线光电子能谱仪(XPS)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等对tFe_(2)O_(3)/rGO纳米复合材料进行了表征;利用差示扫描量热法(DSC)研究了tFe_(2)O_(3)和tFe_(2)O_(3)/rGO对六硝基六氮杂异伍兹烷(CL-20)热分解行为的影响,分析了tFe_(2)O_(3)/rGO复合材料对CL-20的热分解催化效果及其对CL-20的热分解动力学和热安全性的影响。结果表明,引入石墨烯可有效降低tFe_(2)O_(3)颗粒大面积的团聚程度,并且tFe_(2)O_(3)/rGO具有更大的比表面积;石墨烯的引入降低了tFe_(2)O_(3)/CL-20热分解反应的活化能及热分解温度,但未改变其热分解机理;tFe_(2)O_(3)/rGO和tFe_(2)O_(3)使得CL-20的放热分解峰温分别提前了5.35℃和4.79℃,热稳定性降低,表明所制备的tFe_(2)O_(3)/rGO复合材料能有效催化CL-20的热分解。The tetrakaidecahedral iron oxide(tFe_(2)O_(3))nano particles(NPs)were prepared by using the hydrothermal method,and then these as-prepared NPs were combined with graphene(rGO)by using self-assembly technique to obtain the nanocomposites(tFe_(2)O_(3)/rGO).The morphology and structure of tFe_(2)O_(3)/rGO nanocomposites were characterized by different experimental techniques including X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),and transmission electron microscopy(TEM),etc.The thermal decomposition behavior of hexanitrohexaazaisowurtzitane(CL-20)composed with tFe_(2)O_(3) and tFe_(2)O_(3)/rGO was tested using differential scanning calorimetry(DSC).The catalytic effects of tFe_(2)O_(3)/rGO composites on the thermal decomposition of CL-20 as well as the thermal safety were analyzed.The results indicate that the introduction of rGO can effectively decrease the agglomeration of tFe_(2)O_(3) nanocomposites,and the nanocomposites have a larger specific surface area.The addition of graphene reduces the activation energy and thermal decomposition peak temperature of tFe_(2)O_(3)/CL-20,however,it does not change the thermal decomposition mechanism.The exothermic decomposition peak temperatures of CL-20 that mixed with tFe_(2)O_(3)/rGO and tFe_(2)O_(3) decrease by 5.35℃and 4.79℃,respectively.While the thermal stability of CL-20 is decreased.Thus,the tFe_(2)O_(3)/rGO nanocomposites can effectively catalyze the thermal decomposition of CL-20.

关 键 词：物理化学 tFe_(2)O_(3)/rGO纳米复合材料 石墨烯 CL-20 热行为 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]