Ruixuan Xu, Zhihua Xue, Danfeng Yang, Xin Li, Hongqi Nie, Yongqiang Guo, Hua Guo, Qi-Long Yan* and Junwei Gu*. Highly Energy Release of Aluminum@Ammonium Perchlorate Composites Incorporated with Graphene Oxide-based Energetic Coordination Polymer. Advanced Functional Materials, 2024, DOI: 10.1002/adfm.202423205. 2023IF=18.5.（1区材料科学Top期刊）
http://doi.org/10.1002/adfm.202423205
Abstract
Achieving high energy release of aluminum (Al) and ammonium perchlorate (AP) is of significant importance in the realm of energy materials. In this work, integrated Al@AP/GO-CHZ-M (M = Co2+ or Ni2+) composites have been successfully synthesized through an integrated design and precise catalysis approach. The integrated Al@AP/Co composites exhibit fast decomposition, with a 76.6℃ reduction in decomposition temperature and a 66.0% increase in heat release compared to Al+AP mixture counterpart. From a kinetic perspective, the decomposition activation energy for Al@AP/Co is largely decreased by 215.5 kJ mol-1 (-67.4%) and its kinetics shifted to an autocatalytic model. Transition metals in GO-CHZ-M facilitate the proton transfer during the decomposition of AP, significantly increasing the yield of low-valence nitrogen oxides. The ignition of the Al@AP/M composites was enhanced, with a 37.2 ms (-40.2%) reduction in ignition delay and a 6.6-fold increase in radiation intensity over Al+AP. The change from deflagration for the physical mixture to detonation for integrated Al@AP/M composites further suggests highly energy release. Furthermore, the mechanism of the integrated design and precise catalysis on the energy release enhancement of Al@AP composites was elucidated. This approach holds broad application prospects in the fields of solid propellants, aluminized explosives, micro-thrusters and pyrotechnics.
实现铝粉（Al）和高氯酸铵（AP）的高释能效率在含能材料领域具有重要意义。本文基于铝/氧化剂一体化和精准催化设计，成制备了Al@AP/GO-CHZ-M (M = Co2+ or Ni2+)复合材料。Al@AP/Co拥有更快的分解速率，其分解峰温较物理混合物Al+AP降低了76.6℃，反应放热量提高了66.0%。动力学计算表明Al@AP/Co分解活化能减少了215.5 kJ mol-1 (-67.4%)，其分解动力学过程转为自催化模型。GO-CHZ-M催化剂中的过渡金属有助于促进AP分解的质子转移过程，显著提高了产物中低价态氮氧化物的含量。一体化Al@AP/M复合物的点火性能得到改善，点火延迟时间较物理混合物Al+AP缩短了37.2 ms (-40.2%)，火焰辐射强度提高了6.6倍。与物理混合物的爆燃行为相比，一体化Al@AP/M复合物点火后迅速发生爆炸，表明释能效率得到显著增强。此外，本文提出了一体化设计和精准催化对Al@AP复合物的释能增强机制。该设计策略在固体推进剂、含铝炸药、微推进系统及火工品等领域具有广阔的应用前景。
论文亮点
1. 优化制备了Al@AP/GO-CHZ-M (M = Co2+ or Ni2+）复合材料，实现了组分的致密接触及对AP的精准催化。
2. 一体化Al@AP/M复合材料的反应放热量较物理混合物提高了289.2 J g-1 (+66.0%)，分解活化能降低了215.5 kJ mol-1 (-67.4%)。
3. 一体化Al@AP/M复合材料较物理混合物拥有更快的能量释放速率，点火延迟缩短了40.2%，火焰辐射强度提高了6.6倍，呈现出剧烈的爆炸特性。
第一作者：许睿轩邮件地址：xrxpd@nwpu.edu.cn
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