A Strategy for Regulating the Acidity of Explosives Based on Self-Assembly Technology

Résumé fourni par la source

Abstract Energetic compounds typically exhibit a certain degree of acidity; however, excessive acidity can cause corrosion of the charging casing, thereby limiting their application. To investigate the potential of self-assembly technology in modulating the acidity of explosives, this study prepared two self-assembled energetic materials, namely TNP-ATRZ and TNP-TTDO, using the typical acidic explosive TNP as a ligand. Through pH measurements, it was revealed that the acidities of TNP-ATRZ and TNP-TTDO decreased by 41.2% and 73.6%, respectively, compared with that of TNP. Further analysis of intermolecular interactions using Hirshfeld surface analysis and noncovalent interaction calculations indicated that hydrogen bonding not only serves as the primary driving force for the formation of the self-assembled energetic materials but also plays a key role in reducing explosive acidity. Additionally, differential scanning calorimetry (DSC) tests revealed that the decomposition temperatures of TNP-ATRZ and TNP-TTDO are 265.1 and 254.4 °C, respectively, both exceeding 250 °C, which indicates good thermal stability. Detonation performance calculations and sensitivity tests revealed that both materials achieve detonation performance and sensitivity superior or comparable to those of the raw materials. Therefore, self-assembly technology not only regulates the overall performance of energetic materials but also synergistically addresses the issue of explosive acidity, thereby advancing the application of strongly acidic energetic compounds.

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