Defence Technology (Sep 2023)
An energetic nano-fiber composite based on polystyrene and 1,3,5-trinitro-1,3,5-triazinane fabricated via electrospinning technique
Abstract
Electrospinning is a simple technique used to fabricate polymeric nano-fibrous membranes. These nano-fibers have found a wide range of valuable applications in the biomedical field. However, it has not been utilized with solid high explosives yet. Herein, the electrospinning technique has been used to fabricate polystyrene (PS)/1,3,5-trinitro-1,3,5-triazinane (RDX) composite nanofibers. The governed electrospinning parameters, voltage, distance from the collector, flow rate, mandrel rotating speed, time, and solution concentration, that greatly affect the morphology of the obtained nanofibers were optimized. The fabricated PS/RDX nano-fibers were characterized using scanning electron microscopy (SEM), X-ray diffractometer (XRD), and Fourier Transform Infrared (FTIR) spectroscopy. The impact and friction sensitivities of PS/RDX were also measured. The thermal behavior of the prepared composite and the pure materials were studied by the thermal gravimetric analysis technique (TGA). SEM results proved the fabrication of PS/RDX fibers in the nano-size via electrospinning. FTIR spectroscopy confirmed the existence of the characteristic functional groups of both PS and RDX in the composite nano-fibers. XRD sharp peaks showed the conversion of amorphous PS into crystalline shape via electrospinning and also confirmed the formation of PS/RDX composite. The PS fibers absorbed the heat and increased the onset decomposition of the pure RDX from 181.5 to 200.7°C in the case of PS/RDX fibers. Interestingly, PS/RDX nano-fibers showed the relatively low impact and friction sensitivities of 100 J and 360 N respectively. These results could introduce PS/RDX nanofibrous composite in the field of explosives detection with high levels of safety.
