Abstract Nanothermite garners significant interest due to its higher energy release rate and reactivity. However, the agglomeration of nanoparticles has become the major hindrance to the energy release efficiency of nanothermite. Here, we proposed a bottom-up strategy and a facile preparation method to build a hierarchical Al/CuO/V₂C nanocomposite triggered by ordered self-assembly of Al and CuO nanoparticles in ethanol suspension, using V₂C MXene as a template. The unique structure is formed by the competition between the electrostatic force of Al and the covalent Cu-O-V bond to the V₂C surface. The established structure as well as the high reactivity of V₂C result in a complete oxidation of Al, and the heat of the reaction reaches 3156.2 J/g with a 10 wt% addition of V₂C in air atmosphere, being sevenfold of the Al/CuO control group. The evolving concentration-dependent structure provides highly tunable energetic performance, which varies from a shortened 3-ms deflagration to a prolonged 16-ms combustion. The lower gas release improves the safety of Al/CuO/V₂C while paving the way for promising application in microinitiators.
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Zhang et al. (2024) studied this question.
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