Ma Wenzhe, Yang Yanjing, Zhao Fengqi, Xu Kangzhen, Zhang Jiankan, Zhang Ming, Feng Zhicun
Xi'an Modern Chemistry Research Institute Xi'an Shaanxi 710065 China
School of Chemical Engineering, Northwest University Xi'an Shaanxi 710069 China
RSC Adv. 2020 Jan 9;10(3):1769-1775. doi: 10.1039/c9ra08973j. eCollection 2020 Jan 7.
The development of novel combustion catalysts is critical for improving combustion performance of high-energy solid propellants. In this work, a nickel-based Schiff base complex, ,'-bis(salicylidene)ethylenediamino nickel [Ni(Salen)], as a candidate for the combustion catalyst of solid propellants, was synthesized with high purity. The effects of Ni(Salen) on the thermal decomposition reaction of FOX-7, which is closely related to its combustion properties in propellants, were systematically investigated and the corresponding mechanisms were also evaluated through comparison and analysis. Under the action of Ni(Salen), peak temperatures of the two decomposition processes of FOX-7 were reduced from 235.7 and 296.3 °C to 233.7 and 268.7 °C, respectively. The investigations into the mechanisms revealed the interactions between the Schiff base skeleton in Ni(Salen) and FOX-7, which promotes the decomposition of the remaining FOX-7. In addition, it was found that NiO, which was a decomposition product of Ni(Salen), also played an important role in promoting the thermal decomposition of FOX-7.
新型燃烧催化剂的开发对于提高高能固体推进剂的燃烧性能至关重要。在本工作中，高纯度合成了一种镍基席夫碱配合物，即,'-双（水杨醛）乙二胺镍[Ni(Salen)]，作为固体推进剂燃烧催化剂的候选物。系统研究了Ni(Salen)对FOX-7热分解反应的影响，FOX-7的热分解反应与其在推进剂中的燃烧性能密切相关，并通过比较和分析评估了相应的机理。在Ni(Salen)作用下，FOX-7两个分解过程的峰值温度分别从235.7和296.3℃降至233.7和268.7℃。对机理的研究揭示了Ni(Salen)中席夫碱骨架与FOX-7之间的相互作用，这促进了剩余FOX-7的分解。此外，发现作为Ni(Salen)分解产物的NiO在促进FOX-7热分解方面也起着重要作用。
