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Journal of Materials Chemistry A · 2025 · IF 9.5

Constructing Zero-Valent Nanotwinned Copper for the Ignition of [BMIM]N(CN)2-H2O2 Green Propellant

Qing Cheng,Yuqi Zhang,Yingying Cao,Peihao Dou,Long Liu,Yanqiang Zhang

Ionic liquid-H2O2 is a green hypergolic propellant system, and the poor self-ignition hinders its application. Herein, the stable zero-valent catalyst Cu nano-particle with twin boundaries (T-Cu) was synthesized. As the twin boundary regulates the electron micro-environment of the T-Cu surface, the electron transfer from the d electrons of Cu atom to the σ* anti-bonding orbital of H2O2 is intensified to create ·OH and ·OOH. The resulted free radicals possess strong oxidizing ability, and react violently with [BMIM]N(CN)2 to achieve a rapid ignition with the delay time as low as 25 ms. This work provides an effective way to get excellent ignition performance, and promotes the application of Ionic liquid-H2O2 green hypergolic propellants.

CAS / MDL: 497-19-8 50-99-7 7647-14-5 7758-99-8 79917-90-1 6132-04-3

研究领域: 材料科学 · 推进剂工程 · 催化化学

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CHEMISTRY-A EUROPEAN JOURNAL · 2018 ·Vol. 24 ·期 18 ·4620-4627 · IF 5.16

Synthesis and Properties of Triaminocyclopropenium Cation Based Ionic Liquids as Hypergolic Fluids

Yunhe Jin,Binshen Wang,Wenquan Zhang,Shi Huang,Kangcai Wang,Xiujuan Qi,Qinghua Zhang

Graphical Alternative bipropellants : A series of triaminocyclopropenium cation based hypergolic ionic liquids were designed and synthesized. These ionic liquids demonstrate promise as potential alternatives to toxic hydrazine derivatives in liquid bipropellant formulations (see figure). A novel family of hydrophobic triaminocyclopropenium cation based ionic liquids have been synthesized, and their structures and physicochemical properties characterized by NMR and IR spectroscopy, elemental analysis, differential scanning calorimetry, and hypergolic tests. The experimental results showed that all of these ionic liquids exhibited the expected hypergolic reactivity with the oxidizer white fuming nitric acid. Among them, the hypergolic ionic liquid based on the cyanoimidazolylborohydride anion showed excellent integrated properties, including high decomposition temperature (194 °C), high density (0.95 g cm −3 ), moderate viscosity (44 MPa s), ultrafast ignition delay time (6 ms), and high specific impulse (301.9 s); this demonstrates its potential as an environmentally friendly alternative to toxic hydrazine derivatives.

CAS / MDL: 288-32-4 1934-75-4

研究领域: 材料科学 · 化学工程 · 航天推进

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Constructing Zero-Valent Nanotwinned Copper for the Ignition of [BMIM]N(CN)2-H2O2 Green Propellant

Synthesis and Properties of Triaminocyclopropenium Cation Based Ionic Liquids as Hypergolic Fluids