Hydride- and boron-free solid hypergolic H2O2-ignitophores
Hydride- and boron-free solid hypergolic H2O2-ignitophores
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DOI：
10.1016/j.cej.2021.131806
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发表时间：
2021-12
影响因子：
15.1
通讯作者：
Jagadish Das;Daniel Shem-Tov;Shuai-Zhong Wang;Lei Zhang;E. Flaxer;Shi-jie Zhang;Jörg Stierstorfer;Kangcai Wang;Q. Yan;Roman Dobrovetsky;M. Gozin
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文献类型：
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作者：
Jagadish Das;Daniel Shem-Tov;Shuai-Zhong Wang;Lei Zhang;E. Flaxer;Shi-jie Zhang;Jörg Stierstorfer;Kangcai Wang;Q. Yan;Roman Dobrovetsky;M. Gozin
基于使用绿色燃料和氧化剂的环保绿色推进系统的航空航天技术的竞赛和竞争正在引起人们的广泛关注。开发使用自燃燃料和绿色H2O2氧化剂、能够深度节流和从“冷”重新启动的混合动力推进系统是一项非常具有挑战性的任务。在这里，我们描述了一种新的合成方法，基于双（5-四唑基）胺（H2BTA）配体的铜和钴配合物，用于合成和表征概念上新型无氢化物和无硼、空气/水分稳定的固体H2O2-双甘醇。在制备和评估的材料中，发现性能最好的化合物 [K2(H2O)2Cu(BTA)2]n (JD-4) 具有 7 ms 的短点火延迟时间（含 H2O2，97%）和 343 °C 的高热稳定性。根据获得的点火结果、X射线晶体学和HASEM软件计算，进行了结构-自旋活性-关系研究。我们发现，Cu 和 BTA 单元之间的电子密度差应在特定范围内 (~2)，以便这些化合物点燃，这为进一步开发用于推进系统的新型绿色固体燃料提供了宝贵的工具。
The race and competition in aerospace technologies based on environmentally friendly green propulsion systems with green fuels and oxidizers are attracting a significant attention. Development of hybrid propulsion systems that use a hypergolic fuel and green H2O2oxidizer, capable of deep throttling and restarting from “cold”, is a very challenging task. Here, we describe a new synthetic approach for the synthesis and characterization of conceptually new hydride- and boron-free, and air/moisture stable solid H2O2-hypergols, based on Cu and Co complexes of bis(5-tetrazolyl) amine (H2BTA) ligand. Among prepared and evaluated materials, the best performing compound [K2(H2O)2Cu(BTA)2]n (JD-4) was found to exhibit short ignition delay time of 7 ms (with H2O2, 97%), and high thermostability of 343 °C. Based on obtained ignition results, X-ray crystallography and HASEM software calculations, structure-hypergolic activity-relationship studies were conducted. We found that the electron density difference between Cu and BTA units should be in a specific range (~2) for these compounds to ignite, providing a valuable tool for further development of novel, green, solid fuels for propulsion systems.