Hybrid HMX multi-level assembled under the constraint of 2D materials with efficiently reduced sensitivity and optimized thermal stability  

作　　者：Xiaomin Song Longjin Huang Rufang Peng Qi Huang Jinjiang Xu Jie Sun 

机构地区：[1]Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang,621900,China [2]State Key Laboratory of Environment-friendly Energy Materials,School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang,621010,China

出　　处：《Defence Technology（防务技术）》2024年第9期123-132,共10页Defence Technology

基　　金：the financial support from the National Natural Science Foundation of China (Grant No.51972278);the Open Project of the State Key Laboratory of Environment-friendly Energy Materials (Southwest University of Science and Technology,Grant No.20fksy16)。

摘　　要：The interfacial interaction between HMX molecules and coating materials is the key to the safety performance of explosives and has received extensive attention.However,screening suitable coating agents to enhance the interfacial effect to obtain high-energy and low-sensitivity explosives has long been a major challenge.In this work,HMX-PEI/rGO/g-C_(3)N_(4)(HPrGC)composites were innovatively prepared by a multi-level coating strategy of two-dimensional graphite rGO and g-C_(3)N_(4).The g-C_(3)N_(4) used for desensitization has a richπ-conjugated system and shows outstanding ability in reducing friction sensitivity.The hierarchical structure of HPrGC formed by electrostatic self-assembly andπ-πstacking can effectively dissipate energy accumulation under heat and mechanical stimulation through structural evolution,thus exhibiting a prominent synergistic desensitization effect on HMX.The results show that rGO/gC_(3)N_(4) coating has no effect on the crystal structure and chemical structure of HMX.More importantly,the perfect combination of g-C_(3)N_(4) and rGO endows HPrGC with enhanced thermal stability and ideal mechanical sensitivity(IS:21 J,FS:216 N).Obviously,the new fabrication of HPrGC enriches the variety of desensitizer materials and helps to deepen the understanding of the interaction between explosives and coatings.

关 键 词：HMX-PEI/rGO/g-C_(3)N_(4) Electrostatic self-assembly π-πstacking Synergistic desensitization 

分 类 号：TQ560.1[化学工程—炸药化工]