Preparation of Nano-DAAF Explosive with Improved Initiation Sensitivity

摘要

3,3'-diamino-4,4'-zoxyfurazan (DAAF) shows fascinating properties and can be practically applied in explosives and solid rocket propellants. Nano-sized DAAF explosive particles were prepared by a low-temperature and rapid crystallization process to improve energetic performance. The diameter and morphology of DAAF nanoparticles were characterized by Field emission scanning electron microscopy (FE-SEM), Atomic force microscopy (AFM) and X-ray diffraction (XRD). Nano-DAAF shows irregular spherical nano-particles with the diameter ranging from 50 to 100 nm. The size and morphology of nano-DAAF particles can be tuned by temperature difference and DAAF concentration of crystallization process. The thermal properties were also investigated by Differential scanning calorimetry (DSC). For nano-sized DAAF shows significantly decreased exothermal peak (259.3 degrees C) and enhanced energy release rate. Deflagration and short impulse shock waves experiments illustrated that nano-DAAF explosive shows significantly improved initiation sensitivity compared to micro-particles.