在高温下对FOX-7的相位过渡中介冲击无敏化
Xue Zheng1, Shaojun Yu1, Zhijian Yang1
1Institute of Chemical Materials, China Academy of Engineering Physics, 621900, Mianyang, China. wenys@caep.cn.
Physical chemistry chemical physics : PCCP
|September 24, 2025
概括
研究人员通过诱导温度驱动的相位过渡来使像1,1-米诺-2,2-丁乙烯 (FOX-7) 这样的高能材料变得无敏. 这大大降低了机械灵敏度,提高了高能材料的安全性.
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.
- 能量材料 能量材料
背景情况:
- 降低能量材料的机械灵敏度对于安全至关重要.
- 1,1-胺-2,2-丁乙烯 (FOX-7) 是一种高能耗材料,存在重大安全问题.
- 多态过渡为材料脱敏提供了一个潜在的途径.
研究的目的:
- 为了研究FOX-7的温度诱导的多态转换,以使其无敏化.
- 量化FOX-7β阶段机械灵敏度的降低.
- 探索用于提高安全性和性能的综合策略.
主要方法:
- 在现场使用X射线衍射来识别相变.
- 在高温冲击试验中测量了灵敏度 (H50).
- 有限元热力学建模预测了相变动力学和应力演变.
主要成果:
- 在116°C以上发生的FOX-7的α到β相过渡,显著降低了冲击灵敏度.
- 在126°C时,未经修改的FOX-7显示H50比环境条件增加57%.
- 用聚合物 (F2314) 粘合剂涂抹多多巴胺 (PDA) 在126°C下进一步增加H50到111.6厘米.
结论:
- 温度诱导的相位过渡工程是一种可行的策略,可以使FOX-7变得无敏.
- 在β阶段的结构重组和改变的键增强了能量消散.
- 阶段过渡工程为开发本质上更安全的高能材料提供了一个有前途的途径.
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