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Enhancing the Reactivity of Aluminum Powder under Different Heating Rates by Nanoaluminum Powder and Fluororubber
Xinzhou Wu1, Hui Ren1, Jinxiang Yang2
1State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing 100081, China.
ACS Omega
|June 8, 2026
Summary
This study developed fluororubber-coated aluminum powder (C@Al) to boost energy release. The C@Al-10%F composite significantly improved ignition, combustion heat, and dispersion, showing promise for explosives.
Area of Science:
- Materials Science
- Combustion Science
- Energetic Materials
Background:
- Aluminum powder is a key component in energetic materials, but its energy release and combustion characteristics can be improved.
- Developing novel composite materials is crucial for enhancing the performance of explosives and propellants.
Purpose of the Study:
- To design and prepare micro-nanocomposite aluminum powder coated with fluororubber (C@Al) to enhance energy release.
- To investigate the effects of fluororubber coating on the ignition, combustion, and gas production of aluminum powder.
- To evaluate the performance of the C@Al composite in explosive formulations.
Main Methods:
- Preparation of micro-nanocomposite aluminum powder with varying fluororubber contents (C@Al).
- CO2 laser ignition tests to determine ignition delay times.
- Thermogravimetric differential scanning calorimetry (TG-DSC) for activation energy analysis.
- Hot-wire ignition tests to measure combustion heat and radiation intensity.
- Rapid heating tests to assess shock wave propagation speed.
- Incorporation into RDX/Al/binder explosives to evaluate detonation properties.
Main Results:
- The C@Al-15%F composite exhibited the shortest ignition delay time.
- C@Al-10%F showed an earlier reaction moment and lower activation energy, with increased combustion heat, radiation intensity, and shock wave speed compared to controls.
- Addition of C@Al-10%F to explosives increased detonation heat by 207 kJ/kg.
- Fluororubber decomposition enhanced gas production, preventing agglomeration and significantly increasing peak pressure and burning rates.
Conclusions:
- The synergistic effect between nanoaluminum and fluororubber in C@Al-10%F enhances ignition, combustion energy, and product dispersion.
- The developed micro-nanocomposite aluminum powder demonstrates significant potential for applications in explosives and related energetic material fields.
