Rapid Assembly and Preparation of Energetic Microspheres LLM‐105/CL‐20

Abstract A novel composite microsphere of 2,4,6,8,10,12‐hexanitrohexaazaisowurtzitane (CL‐20) and 2,6‐diamino‐3,5‐dinitropyrazine‐1‐oxide (LLM‐105) were fabricated by spray drying technology. The morphology, structure and thermal behavior of the obtained particles were characterized via scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT‐IR), powder x‐ray diffraction (PXRD) and differential scanning calorimetry (DSC). SEM results demonstrated that LLM‐105/CL‐20 microspheres in range of 1–3 μm are relatively uniform. PXRD and FT‐IR indicated that the peak patterns of the composite LLM‐105/CL‐20 has shifted slightly from the raw material. Thermal analysis implied that energetic microspheres LLM‐105/CL‐20 has lower decomposition. In addition, a possible formation mechanism for energetic microsphere was proposed. Moreover, the impact sensitivity of composite microspheres could be reduced 5 times compared to the raw CL‐20. This work may introduce a novel idea towards fabricating the composite microspheres.