Abstract
The laser ignition has been proposed for the realization of safe and reliable ignition of explosives. However, the high energy of laser ignition has seriously hindered its practical application. Therefore, it is of great significance to the wide application of laser ignition for developing a photosensitizer with good laser ignition performance under low laser energy. Herein, a free-standing graphene oxide (GO)/cyclotrimethylene trinitramine (RDX) composite film, known as GxRy (x: the mass of GO, y: the mass of RDX) composite film, was obtained to investigate the laser ignition performance. The results showed that the laser photothermal properties of GxRy composite films could be significantly improved by mixing GO with RDX. The temperature of G20R5 composite film could raise from 25 to 1040 °C under the pulsed laser irradiation (450 nm, 0.7 W), showing excellent photothermal properties. The high temperature rise of G20R5 film under laser irradiation might be due to the decomposition and combustion of RDX in the G20R5 film. The G20R5 composite film would be a promising laser photothermal conversion device for low initial energy photothermal ignition and provide a new idea for the preparation of photosensitizers with high laser photothermal properties.
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