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8348856 
Journal Article 
基于溶剂/非溶剂法的微通道结晶制备CL-20/HMX共晶 
Li, L; Yin, T; Wu, B; Duan, XH; Pei, CH 
2021 
1 
Hanneng Cailiao / Chinese Journal of Energetic Materials
ISSN: 1006-9941 
Institute of Chemical Materials, China Academy of Engineering Physics 
29 
1 
62-69 
Chinese 
In order to develop a scale-up and continuous preparation method, the microchannel crystallization technology based on solvent/non-solvent method has been used to prepare hexanitrohexaazaisowurtzitane/octogen (CL-20/HMX) co-crystal. The field emission scanning electron microanalyzer (FE-SEM), X-ray powder diffraction (XRD), Raman spectroscopy, Fourier infrared spectroscopy (FT-IR), thermal analysis and sensitivity test were applied to characterize and analyze the morphology, structure, thermal performance and sensitivity of samples. Results show that this method has successfully prepared CL-20/HMX co-crystal. Its apparent morphology is the flower clusters with a diameter of 20-30 μm, assembled by platelet crystals with thickness of 200-600 nm, accompanying individual flaky crystals (thickness of 200-600 nm). The CL-20/HMX co-crystal prepared by microchannal crystallization has only one sharp exothermic decomposition peak during the exothermic process. Its exothermic peak temperature is at 243.4℃, which is lower than that of the raw materials CL-20 (250.2℃) and HMX (284.7℃). Its temperature range of thermal decomposition is only from 242.7 to 246.0℃, much narrower than those of raw CL-20 (230.0-254.6℃) and HMX (281.0-290.7℃), which means a higher energy release efficiency. Its apparent active energy is 470.75 kJ•mol-1, falling between CL-20 (175.04 kJ•mol-1) and HMX (481.45 kJ•mol-1), which is 297.29 kJ•mol-1 hagher than that of raw CL-20, indicating a good thermal stability. Its impact sensitivity is 18 J, which is 8 J and 3.6 J higher than those of raw CL-20 (10 J) and HMX (14.4 J) respectively, and the friction sensitivity is 20% lower than that of raw CL-20. The sensitivity results show the safety of the CL-20/HMX co-crystal has been improved compared with the raw materials. © 2021, Editorial Board of Chinese Journal of Energetic Materials. All right reserved. 
CL-20/HMX co-crystal; Microchannel crystallization technology; Sensitivity; Solvent/non-solvent method; Thermal performance