氧化石墨烯对含CL-20的NEPE推进剂热分解及燃烧性能的影响

In order to investigate the effects of graphene oxide (GO) on the thermal decomposition and combustion process of NEPE propellants containing CL-20, NEPE propellants with different GO contents were prepared using a solvent-nonsolvent method. The microtopography, thermal decomposition kinetic parameters and burning rate of the NEPE propellants were analyzed using scanning electron microscopy (SEM-EDS), simultaneous thermal analysis (STA) and rapid compression machine (RCM). Results show that the addition of GO resulted in the formation of a dense layered structure on the surface of NEPE propellant, where large particles of CL-20, HMX and AP were cladded, whose contents also decreased. The smaller Al particle size was evenly distributed in the layered structure of GO, leading to an increase in Al content on the surface. The thermal decomposition of NEPE propellant without graphene oxide (GO0) mainly includes five exothermic stages. While, the addition of graphene oxide merges the thermal decomposition process of the propellant into three main exothermic stages. GO has an inhibitory effect on the thermal decomposition of CL-20 and HMX, but promotes the thermal decomposition of AP. The burning rate of GO0 is 9.5 mm/s at 3.5 MPa and 825 K. Note that burning rates of NEPE propellants increased by 10%~20% with the addition of 0.025%~0.1% GO.