Bionic functional layer strategy to construct synergistic effect-based high-safety CL-20@PDA@GO core-shell-shell structural composites

Abstract

Aiming to comprehensively improve the safety of energetic materials by minimizing their sensitivity to external stimuli such as impact, friction, static electricity and heat, a bionic functional layer strategy is developed to construct energetic composites with core-shell-shell structure. The morphology and structure of the samples were characterized in depth by scanning electron microscopy (SEM), X-ray diffractometer (XRD) and X-ray photoelectron spectra (XPS). The results show that the bionic functional layer forms a dense and complete shell layer on the surface of energetic material, the two-dimensional (2D) material is uniformly and tightly coated on the surface of energetic material based on the super adhesion of the functional interface layer, and the core-shell-shell structure CL-20@Polydopamine@Graphene Oxide (CL-20@PDA@GO) is successfully prepared. The preparation process does not cause the crystalline transformation of energetic material. In addition, the impact sensitivity, friction sensitivity, electrostatic accumulation characteristics and thermal properties of the samples were also evaluated. The results indicate that the bionic functional layer and 2D material can synergistically reduce the sensitivity of energetic material to external stimuli based on their intrinsically superior properties. Therefore, synergistic effect of bionic functional layer strategy in this work has the potential to be extended for multiple properties regulation of energetic materials.