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Synlett
DOI: 10.1055/a-2310-0707
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Energetic Molecules

N-Alkyl-1,2,4-triazole–Borane Complexes as High-Density Hypergolic Materials

Hongfu Jia
a   School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. of China
b   Hubei Institute of Aerospace Chemotechnology, Xiangyang, 441003, Hubei, P. R. of China
,
Wenqi Ma
a   School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. of China
,
Jinjie Chang
a   School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. of China
,
Chunlin He∗
a   School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. of China
› Author AffiliationsThis work was supported by the National Natural Science Foundation of China (No. 22375021).
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Abstract

Hydrazine and its derivatives have served as a conventional bipropellant fuel for several decades. However, their extremely acute toxicity and carcinogenicity, high volatility, and environmental impact have attracted significant attention. In order to synthesize green bipropellant fuels with high density, high specific impulse, and good thermal stability, three novel N-alkyl-1,2,4-triazole–borane complexes were successfully synthesized by reacting alkylated 1,2,4-triazole coordinated with sodium borohydride in the presence of ammonium sulfate. During the droplet test with white fuming nitric acid, there was a relatively short ignition delay time of 98 ms. Additionally, these hypergolic fuels possessed a high density exceeding 1.10 g cm–3, and the specific impulse is ranging from 187 to 199 s, and the highest decomposition temperature reaches 153.4 °C. These results demonstrate their great potential as hypergolic fuels or hypergolic ionic liquid additives in the field of hypergolic materials.

Key words

borane complex - hypergolic materials - synthesis - 1,2,4-triazole - specific impulse

Supporting Information



Publication History

Received: 01 March 2024

Accepted after revision: 20 April 2024

Accepted Manuscript online:
20 April 2024

Article published online:
06 May 2024

© 2024. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 

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