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先进的Al水凝推进剂:制备,热稳定性和自我可持续的燃烧特性

Jun-Lian Hao¹, Yiran Zhang¹, Haorui Zhang¹

¹National Key Laboratory of Solid Rocket Propulsion, Northwestern Polytechnical University, Xi'an 710072, China.

Langmuir : the ACS journal of surfaces and colloids

|December 2, 2024

概括

新的基水凝推进剂比Al-ice提供了更好的性能. 经过Al@PVDF-CuO和甲 (AP) 的增强,它们表现出更高的点火温度和稳定的燃烧速率,适用于先进的推进应用.

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.
航空航天工程航空航天工程

背景情况:

目前的Al-ice推进剂在性能和稳定性方面面临限制.
需要具有增强点火和燃烧特性的先进推进剂.
基于的水凝为下一代推进系统提供了一个有希望的替代方案.

研究的目的:

开发和评估基于Al的新型水凝推进剂.
为了提高这些水凝的点火和燃烧性能.
调查添加剂如Al@PVDF-CuO和甲 (AP) 在推进剂特性上的作用.

主要方法:

制备和描述基于Al的水凝推进剂.
热重力测量分析 (TGA) 用于确定热稳定性和点火温度.
燃烧性能评估,包括燃烧速度测量.
反应力场 (ReaxFF) 分子动态模拟以研究反应机制.

主要成果:

新型水凝推进剂的最大点火温度为2277°C,明显高于Al-ice推进剂 (1700°C).
水凝推进剂表现出优异的热稳定性,初始质量损失温度在211-235°C之间,归因于凝剂三氨基瓜尼丁-酸聚合物 (TAGP).
实现了稳定可控的燃烧速率,从2.5到5.9mm·s-1不等,燃烧产品主要是α-Al2O3.

结论:

与传统的Al-ice推进剂相比,开发的基于Al的水凝推进剂显示出优越的点火和热稳定性.
添加剂如Al@PVDF-CuO和AP有效地提高了燃烧性能.
这些水凝推进剂是先进的推进系统的可行替代品,需要控制和高效的能量释放.

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