硝化石墨烯诱导CL-20自组装堆垛结构的制备及性能  

Preparation and Properties of Self-assembled Stacking CL-20 Induced by Nitrified Graphene

作　　者：罗川东 罗庆平 贾浩巍 伍波 李兆乾 段晓惠 LUO Chuan-dong;LUO Qing-ping;JIA Hao-wei;WU Bo;LI Zhao-qian;DUAN Xiao-hui(State Key Laboratory of Environment‑friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,四川绵阳621010

出　　处：《含能材料》2023年第11期1097-1104,共8页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(22075230)。

摘　　要：为改善六硝基六氮杂异伍兹烷(CL-20)的安全性能,用硝化石墨烯(NG)作为结晶诱导剂,通过溶剂-非溶剂法制备了具有自组装堆垛结构的CL-20。采用场发射扫描电子显微镜(SEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、同步热分析仪(DSC-TG)对所制备CL-20的形貌、结构、热性能进行了表征,并对其机械感度进行了测试分析。结果表明,在不同含量NG的诱导下,CL-20重结晶成方形片状晶体,并自组装堆垛成花瓣型、螺型、塔型等结构。在CL-20自组装堆垛结构的形成过程中,NG的诱导作用体现在其片层对CL-20的吸附作用以及其活性基团与CL-20的基团之间形成氢键上。与原料CL-20相比,自组装堆垛结构CL-20热分解温度降低约5℃,热分解焓最大提高约33%,质量损失从81%提高到99%,机械感度大幅降低。当NG含量为0.5%时,诱导结晶形成的自组装花瓣结构CL-20的撞击感度最低,为6 J。In order to improve the safety performance of hexanitrohexaazaisowurtzitane(CL-20),the CL-20 with self-assembled stacking structures were prepared by the solvent-nonsolvent method using nitrified graphene(NG)as a crystallization inducer.The morphologies,structures,and thermal properties of the stacking structure CL-20 were characterized by field emission scan-ning electron microscopy(FE-SEM),X-ray diffraction(XRD),fourier transform infrared spectroscopy(FT-IR),and synchronous thermal analyzer(DSC-TG)respectively,and their mechanical sensitivities were tested and analyzed.The results show that un-der the induction of different content of NG,CL-20 recrystallizes into square flake crystals,and self-assembles and stacks into petal-shaped,spiral-shaped,tower-shaped,and other structures.During the formation of the self-assembled stacking CL-20,the induction effects of NG are reflected in the adsorption effect of its sheet layer on CL-20 and the formation of hydrogen bonds be-tween NG´s active functional groups with CL-20.Compared with the raw CL-20,the thermal decomposition temperature of the self-assembled stacking CL-20 is reduced by about 5℃,the maximum thermal decomposition enthalpy is increased by about 33%,and the mass loss is increased from 81%to 99%.The prepared self-assembled stacking CL-20 has a significantly lower me-chanical sensitivity than that of the raw CL-20.When the NG content is 0.5%,the self-assembled petal CL-20 prepared by NG in-duction has the lowest impact sensitivity of 6 J.

关 键 词：硝化石墨烯 六硝基六氮杂异伍兹烷 自组装 结晶 机械感度 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]