Research On Preparation And Performance Of Al-CuO/Graphene Oxide Energetic Igniting Bridge Film

In this paper, Al-CuO/GO composite energetic materials were prepared by electrostatic self-assembly method and in-situ load method. Al-CuO/GO energetic igniting bridge films were respectively prepared by electrophoretic deposition method and layer-by-layer assembly method, and the ignition performances were studied. The main research work and conclusions are as follows:(1) Graphene oxide was prepared by modified Hummers method. It contained a large amount of oxygen-containing groups on the GO sheets, and the onset degradation temperature of oxygen-containing groups arrived at 184℃.(2) Al/GO composite materials were prepared by electrostatic self-assembly method, and it had the best loading effect when using PEG-600 as dispersion agent. CuO/GO composite materials were prepared by in-situ load method, and CuO nanoparticles were spindlelike and particle size of about 250nm.(3) In order to study its thermal properties, Al-CuO/GO composite materials were prepared by mixing Al/GO composite materials and CuO/GO composite materials physically to a scale. The results show that Al and CuO nanoparticles couldn’t be fully mixing and well dispersion by ultrasonic mixing method. Al-CuO/GO composite materials were also prepared by Al particles and CuO/GO composite materials using electrostatic self-assembly method in a certain proportion. The microstructural aspects and thermal properties were analyzed. The results show that the exothermic decomposition of oxygen-containing groups in GO could trigger the redox reaction of Al/CuO thermite. The total heat release of this process was 6380μV·s/mg and there was no other exothermic process when the mass ratio of Al and CuO/GO was 1:15.(4) Al-CuO/GO energetic igniting bridge film was prepared by electrophoretic deposition method on Cu substrates, and its ignition performances were studied. The results show that the deposition efficiency of the film could be improved by increasing the concentration of the electrophoretic liquid, the deposition voltage and time properly. Al-CuO/GO energetic igniting bridge film could be successfully ignited at a constant voltage of 30V, and the ignition process continued for about 0.8ms.(5) GO film could be made by electrophoretic deposition on Cu substrates when the concentration of GO was 0.5mg/mL, the voltage was 5V, the time was 5min. Al-CuO/GO composite thin film was prepared by Al and CuO nanoparticles loading on GO substrates through the layer-by-layer assembly method. The thermal properties and ignition performances were studied. The results show that the redox reaction of Al/CuO thermite couldn’t be triggered by the exothermic decomposition of oxygen-containing groups. The heat release of polyelectrolyte decomposition was much larger than the reaction of thermite. Al-CuO/GO energetic igniting bridge film with 30 bilayers could be successfully ignited at a constant voltage of 30V, and the ignition process continued for 4.5ms.