Propellants Explosives Pyrotechnics, Vol.43, No.11, 1149-1156, 2018
Preparation and Performance of Pentaerythrite Tetranitrate-Based Composites by Direct Ink Writing
Direct ink writing (DIW), a promising technology for manufacturing energetic materials, has been a hot topic in the micro-scale charge of explosives. Herein, three kinds of pentaerythrite tetranitrate (PETN)-based all-liquid explosive inks were engineered and patterned using DIW. Scanning electron microscopy, energy-dispersive x-ray spectroscopy, X-ray diffraction, differential scanning calorimetry, and nanoindentation were used to characterize the printed samples. The density, thickness of single layer, impact sensitivity and critical size of detonation were measured and analyzed. Results show that PETN/EC/Viton exhibits excellent properties, specifically greater activation energy (148.09 KJ mol(-1)), elastic modulus (2.808 GPa), and characteristic height (49.9 cm, 2.5 kg), over the two other samples. Moreover, a directly deposited sample in small grooves can provide steady detonation above the size of 1x0.101 mm. These features all contribute to the application of micro-size detonation to a certain degree.