使用神经进化潜力在高温和高压下预测CL-20和宿主-客体晶体的反应动力学
Zhi-Qiang Hu1, Yi-Fan Xie1, Rui Liu1
1State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, China.
The Journal of chemical physics
|May 5, 2025
概括
在CL-20晶体中的客分子影响冲击压缩和热分解. 分子动力学模拟揭示了这些反应在极端条件下如何影响能量材料.
科学领域:
- 材料科学 材料科学 材料科学
- 化学物理 化学物理
- 计算化学计算化学
背景情况:
- 充满活力的宿主-客人化学使得新的晶体结构设计成为可能.
- 在极端条件下预测CL-20晶体的反应动力学对于安全性和性能至关重要.
- 了解冲击压缩和热分解对于高能材料至关重要.
研究的目的:
- 用分子动力学模拟来研究CL-20晶体的冲击压缩和热分解行为.
- 阐明客分子在促进冲击条件下的反应中的作用.
- 为控制爆炸性能提供原子层次的理解.
主要方法:
- 用分子动力学模拟来研究CL-20晶体的行为.
- 温度监测被用来跟踪在冲击压缩过程中从未反应到反应的Hugoniot状态的过渡.
- 在热分解过程中监测了潜在能量演变,以确定反应途径和能量变化.
主要成果:
- 在CL-20分解后,冲击压缩诱导了过渡到反应的Hugoniot状态,客分子促进了反应.
- 在反应状态下温度上升的顺序是N2O > CO2 > H2O2 > NCCH3 > β > α > γ > ε.
- 热分解是作为产生NO2的内热反应开始的,随后环向CO2开放;客分子NCCH3和H2O2被消耗.
- 激活能量按照以下顺序进行: ε > β > γ > NCCH3 > N2O > CO2 > α > H2O2.2.
结论:
- 客分子显著影响CL-20晶体的冲击压缩和热分解.
- 该研究提供了关于CL-20在极端条件下的反应机制和能量动态的详细见解.
- 这些发现为优化高能材料的爆炸性能提供了原子层面的视角.
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