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

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

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The interfacial interaction between HMX molecules and coating materials is the key to the safety per-formance 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-C3N4(HPrGC)composites were innovatively prepared by a multi-level coating strategy of two-dimensional graphite rGO and g-C3N4.The g-C3N4 used for desen-sitization has a rich π-conjugated system and shows outstanding ability in reducing friction sensitivity.The hierarchical structure of HPrGC formed by electrostatic self-assembly and π-π stacking can effec-tively dissipate energy accumulation under heat and mechanical stimulation through structural evolu-tion,thus exhibiting a prominent synergistic desensitization effect on HMX.The results show that rGO/g-C3N4 coating has no effect on the crystal structure and chemical structure of HMX.More importantly,the perfect combination of g-C3N4 and rGO endows HPrGC with enhanced thermal stability and ideal me-chanical 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.

HMX-PEI/rGO/g-C3N4Electrostatic self-assemblyπ-π stackingSynergistic desensitization

Xiaomin Song、Longjin Huang、Rufang Peng、Qi Huang、Jinjiang Xu、Jie Sun

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Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang,621900,China

State Key Laboratory of Environment-friendly Energy Materials,School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang,621010,China

National Natural Science Foundation of ChinaOpen Project of the State Key Laboratory of Environmentfriendly Energy Materials(Southwest University of Science and Technol

5197227820fksy16

2024

10.1016/j.dt.2024.03.007

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.39(9)