Liquid Carbon-Boron Cluster Additives for Mixed Amine-50
Boron-containing compounds, known for their high calorific value, can significantly enhance the energy density of traditional liquid propellants. Through precise chemical modification of the C-H bonds in <i>ortho</i>-carborane, a novel liquid cluster material was synthesized: C,C′-Bis(2-...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/9/2037 |
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| Summary: | Boron-containing compounds, known for their high calorific value, can significantly enhance the energy density of traditional liquid propellants. Through precise chemical modification of the C-H bonds in <i>ortho</i>-carborane, a novel liquid cluster material was synthesized: C,C′-Bis(2-ethylhexanoylmethyl)-<i>o</i>-carborane (<b>BEHMC</b>). This compound exhibits excellent stability, density, and energy properties. By combining <b>BEHMC</b> with mixed amine-50, a cluster liquid propellant was formulated, and its key performance metrics such as density, freezing point, mass calorific value, and volumetric calorific value were evaluated. The propellant achieved a density of 0.884 g·cm<sup>−3</sup>, a freezing point below −55 °C, a mass calorific value of 41.13 kJ·g<sup>−1</sup>, and a volumetric calorific value of 36.36 kJ·cm<sup>−3</sup>. The theoretical specific impulse reached 346 s, and the theoretical density impulse was 2.99 × 10<sup>6</sup> N·s·m<sup>−3</sup>. Compared to the traditional mixed amine-50/red fuming nitric acid propellant, the cluster liquid propellant developed in this study maintains a similar calorific value while improving the theoretical specific impulse and density impulse by 2.3% and 3.8%, respectively. |
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| ISSN: | 1420-3049 |