Construction of a composite surface coating layer with high efficiency on desensitization of HMX

Abstract. Matching and optimizing the characteristics of desensitizing agent and constructing uniform, complete surface layer were key factor to achieve efficient desensitization of energetic materials. Combined the advantages of wax and MoS2, a composite desensitizer surface layer was constructed, which exhibited improved performance to decrease mechanical sensitivity of HMX crystals. In addition, a surfactant was designed and prepared to improve the wettability between solid (HMX and MoS2) and liquid (melted wax), obtaining an evenly dispersion of MoS2 in melted wax, as well as a complete surface layer. With 0.95 % weight percentage of desensitizing agent, the impact sensitivity and friction sensitivity of HMX-Composite particles were 0% and 0%, respectively, which showed high efficiency to desensitize the HMX particles, satisfying the application demands of insensitive munitions.