Fabrication of Ultrafine CL-20-based Composite Energetic Microspheres by Electrostatic Spray Method and Study on the Performance

To make the CL-20 spherical and reduce its reaction activation energy, the ultrafine NC/CL-20 composite energetic microspheres were successfully fabricated by an electrostatic spray method. By controlling the conditions of electrostatic spray experiment and precursor solution parameters, 1-3μm narrow size distributed composite microsphere particles with complete spherical degree were obtained. The effect of CL-20 content on the particle size of microspheres was studied. The study on infrared spectrum analysis, X-ray diffraction (XRD) analysis and thermal decomposition reaction kinetics for composite microspheres was performed. The results show that CL-20 and NC in the composite microspheres are only physical composites. Raw material CL-20 is ε crystal form, but CL-20 in the composite microspheres prepared by electrostatic spray is β crystal form. Exothermic peak temperatures of several composite microspheres are lower than that of the raw material CL-20. Compared with raw material CL-20, the activation energy for the decomposition reaction of NC/CL-20 composite microspheres decreases by 28.47kJ/mol.