Design and fabrication of aluminum-free energetic thermites films with high activity, energy density and stability

摘要

Energetic thermites films have been widely used in the field of microscale energy-demanding systems because these materials can release a large amount of stored energy on combustion. Even though aluminum-based films have been studied for years, developing novel, facile, and scalable methods to synthesize energetic films with high-energy-density and high stability is still a persistent challenge. Here, we report a new concept aluminum-free thermites based on an energetic metal-organic framework [Cu(atrz)_3(NO_3)_2]_n (MOF(Cu), atrz = 4,4'-azo-1,2,4-triazole) as a fuel through the electrostatic spinning method for the first time. Compared with the traditional aluminum-based thermites films, this new films exhibit superior performances such as low electrostatic discharge sensitivities, low ignition temperatures, high heats of reaction, high activity, and production of very few solid residues. It is anticipated that this work will open a new field for the application of MOFs for energetic thermites films, while laying the groundwork for the development of new energetic materials.