Production, Characterization, and Flowability of Assemblies Consisting of Highly Active Aluminum Nanoparticles

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Production, Characterization, and Flowability of Assemblies Consisting of Highly Active Aluminum Nanoparticles

Ding, Ang

Highly active aluminum nanoparticles are currently needed as a component in propellants. A hybrid spray method was used the HT (stating in this paper that the HT was cured in a 1.05∶1.00 mass ratio of hydroxyl-terminated polybutadiene to 2’4-toluene diisocyanate) to coat the surface of highly active aluminum nanoparticles, as accomplished in a xylene suspension. As indicated, HT coating can be completely carried out to form high-quality assemblies in micrometer scale, which can prevent circumambient oxygen from infiltrating and reacting with the active aluminum nanoparticles while favoring the preservation of the assemblies for a long term. The existence of voids or holes in the assembled aluminum nanoparticles could reduce density and improve the combustion thermal efficiency in a propellant. The flowability of the HT-coated assemblies evidently increases in comparison to that of original aluminum nanoparticles. Related mechanisms have been investigated and discussed. In terms of quality and content of highly active aluminum nanoparticles in the assemblies, the potential applications could be realized by the hybrid spray process.