Abstract Nanothermites have a promising study in micro propellant due to its faster reaction rate, higher energy-release efficiency, and significantly enhanced combustion performance. However, most thermites prepared by physical mixing are easy to separate during the propellant preparation process, significantly impeding the embodiment of the advantages of thermite. In this study, Al/CuO/PVDF microspheres incorporating high explosive RDX have been successfully assembled by electrospray technology. The thermal and combustion performance of the composite microspheres have significantly improved. They have shorter delay time, burning time, and higher pressure, pressurization rate than the physical mixtures, which are attributed to their uniform structure and the interaction of the components. And based on combustion tests, the combustion performance of microspheres is mainly affected by the content of RDX. These results indicate that the electrospray technology and adding RDX into microspheres are effective methods to prepare nanothermites with enhanced reactivity.

中文翻译：

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具有增强燃烧性能的高能亚稳态 Al/CuO/PVDF/RDX 微球

摘要 纳米铝热剂具有反应速度快、能量释放效率高、燃烧性能显着增强等优点，在微型推进剂领域具有广阔的应用前景。然而，大多数通过物理混合制备的铝热剂在推进剂制备过程中容易分离，严重阻碍了铝热剂优势的体现。在这项研究中，通过电喷雾技术成功组装了含有高爆炸药 RDX 的 Al/CuO/PVDF 微球。复合微球的热性能和燃烧性能得到显着提高。它们比物理混合物具有更短的延迟时间、燃烧时间和更高的压力、加压速率，这归因于它们的均匀结构和组分的相互作用。并且根据燃烧测试，微球的燃烧性能主要受RDX含量的影响。这些结果表明，电喷雾技术和在微球中加入 RDX 是制备具有增强反应性的纳米铝热剂的有效方法。