主体-客体能量物质CL-20/HA在高压下通过基于量子的分子动力学模拟的反应机制和电子特性
Yiwen Xiao1, Lang Chen1, Kun Yang1
1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China. chenlang@bit.edu.cn.
这项研究揭示了CL-20/HA爆炸物中的氧胺 (HA) 如何通过电荷转移和冲击下的键裂变影响引爆,为更安全的高能材料提供了洞察力. 这项研究阐明了先进的能量材料的反应机制.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 计算化学计算化学
背景情况:
- 在不牺牲安全的情况下,CL-20/HA主机-客机材料增强了CL-20的爆炸能量.
- 由于其复杂的结构,在高压下CL-20/HA的反应机制仍然不完全理解.
研究的目的:
- 通过使用多尺度冲击模拟来研究CL-20/HA的冲击诱导反应机制.
- 分析不同冲击条件下的电荷转移,电子特性,反应路径和产品演变.
主要方法:
- 采用了一种多尺度冲击模拟技术.
- 利用基于量子的分子动力学.
- 模拟不同速度和方向的冲击冲击.
主要成果:
- 结构变化和CL-20和HA之间的电荷重叠改变了电子特性,并减少了能量差距.
- 在CL-20和HA碎片之间的定向电荷转移导致CL-20中的C-N键裂变,释放和氧化.
- 氧胺或其衍生的H原子促进N-O键裂变,并可以暂时桥接CL-20分子.
结论:
- 氧胺在冲击下的CL-20/HA反应机制中起着至关重要的作用.
- 起初,HA可以抑制CL-20反应,这表明它在能量释放中起着复杂的作用.
- 了解客分子对宿主反应的影响,是推进密集的宿主-客能量材料的关键.
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