Morphology control and crystal structure and properties analysis of FOX-7/HMX composite crystals prepared by rotary evaporation method  

作　　者：Penglin Kang Wenjie Liu Wenyu Wu Xiaodong Li Xiaona Cui Fengze Cai Qicong Jiang 

机构地区：[1]North University of China,School of Environment and Safety Engineering,Taiyuan,030051,China

出　　处：《Particuology》2025年第3期1-12,共12页颗粒学报(英文版)

基　　金：supported by the Natural Science Foundation of Shanxi Province,China(grant No.202203021212147).

摘　　要：Enhancing the safety of high-energy explosives(EMs)is crucial for the secure handling of energetic materials during storage,transportation,and use.Compositing multiple energetic materials effectively enhances the insensitivity of explosives.This study used N,N-dimethylformamide(DMF)as a solvent in the rotary evaporation method to prepare 1,1-diamino-2,2-dinitroethene/1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane(FOX-7/HMX)composite crystals.By varying the molar ratios of FOX-7 and HMX,this study investigated their effects on the morphology of the composite crystals,and the formation mechanism of the composite crystal was analyzed.The study characterized and tested the crystal structure,thermal decomposition,cook-off performance,and impact sensitivity of the composite crystal.The results indicate that at a 5:5 M ratio of FOX-7 to HMX,the compound degree is 90.79%,and FOX-7 exhibits uniform adhering to the surface of the HMX crystal.FT-IR and XRD patterns analyses revealed shifts in the absorption peak of the composite crystal and the characteristic peak of the XRD curve.FOX-7 crystals were embedded on the surface of HMX crystals,forming a co-crystal layer and altering the crystal structure.Differential scanning calorimetry tests demonstrate that the thermal decomposition temperature of FOX-7/HMX composite crystals is 1.77°C higher than the raw FOX-7,and during the cook-off test,the composite crystal reaction level is combustion,accompanied by an increase in characteristic drop height to 62.6 cm,indicating improved thermal stability and impact safety.

关 键 词：Rotary evaporation Energetic composite crystals Crystal structure Impact sensitivity Cook-off performance 

分 类 号：TQ560.1[化学工程—炸药化工]