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聚多巴胺@铁氧化物涂层甲核心外复合材料的设计,以提高基于HTPB的推进剂的燃烧性能
Yuchen Zhang1, Baoyun Ye1, Chengyuan Hua1
1School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China.
Langmuir : the ACS journal of surfaces and colloids
|January 8, 2025
概括
这项研究开发了一种使用多巴胺和氧化铁纳米粒子的新型双层甲 (AP) 催化剂. 这种先进的复合材料显著提高了推进剂的燃烧性能和稳定性.
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.
- 燃烧科学 燃烧科学
背景情况:
- 甲 (AP) 是固体推进剂中的关键氧化剂,但其与铁氧化物纳米粒子 (Fe2O3 NPs) 等催化剂的聚合阻碍了性能.
- 开发有效的方法来稳定和增强AP的催化活性对于提高推进剂效率至关重要.
研究的目的:
- 通过皮克林乳液界面聚合,设计使用多巴胺 (DA) 和Fe2O3NP的AP双层封装系统.
- 调查这种复合系统对基于HTPB的推进剂的燃烧性能,热分解和安全性的影响.
主要方法:
- 使用皮克林乳液对多巴胺的界面聚合,在Fe2O3NP上产生双层,形成AP@PDA@Fe2O3.3.
- 进行热分解实验 (TGA/DSC) 来分析分解温度和热释放.
- 测量了修改后的推进剂的燃烧速度和冲击灵敏度.
主要成果:
- AP@PDA@Fe2O3复合物有效地缓解了Fe2O3 NP聚合物,表现出比纯Fe2O3.3更高的性能.
- 观察到降低了分解温度 (318.8°C),增加了热释放 (183.8%),并减少了激活能量 (~30.0%).
- 燃烧速度增加了约3.0倍,冲击灵敏度增加了28.6%,表面疏水性得到了增强.
结论:
- PDA/Fe2O3的协同催化作用和密集的双层结构显著提高了AP的燃烧性能.
- 这种新的表面改造策略为改进其他能量材料提供了一种新的方法.
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