Xu Ruixuan, An Chongwei, Huang Hao, Wang Jingyu, Ye Baoyun, Liu Bin
School of Environment and Safety Engineering, North University of China Taiyuan 030051 Shanxi China
Shanxi Engineering Technology Research Center for Ultrafine Powder, North University of China Taiyuan 030051 Shanxi China.
RSC Adv. 2019 Jul 4;9(36):21042-21049. doi: 10.1039/c9ra03394g. eCollection 2019 Jul 1.
Multi-scale ultrafine 1,1-diamino-2,2-dinitroethene (FOX-7) samples with different particle size were fabricated and specifically, nano-FOX-7 was successfully prepared by a green mechanophysical milling method. All samples were characterized by field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). Impact and friction sensitivities of the samples were tested and thermal analysis was performed by differential scanning calorimetry (DSC) and thermogravimetry (TG). Ultrafine particles with a mean size of 40 nm, 0.9 μm and 3.4 μm respectively showed less sensitivity than raw FOX-7, whose particles size was about 20 μm. The critical drop height of ultrafine FOX-7 increased from 129 cm to 172 cm, 142 cm and 136 cm, respectively and the friction sensitivity reduced from 32% to 8%, 16% and 20%, respectively. Furthermore, the apparent activation energy of ultrafine particles increased compared with raw materials, which suggested the thermal stability of the ultrafine particles was improved.
制备了具有不同粒径的多尺度超细1,1-二氨基-2,2-二硝基乙烯（FOX-7）样品，具体而言，通过绿色机械物理研磨法成功制备了纳米级FOX-7。所有样品均用场发射扫描电子显微镜（FE-SEM）和X射线衍射（XRD）进行表征。测试了样品的撞击和摩擦感度，并通过差示扫描量热法（DSC）和热重分析法（TG）进行热分析。平均粒径分别为40nm、0.9μm和3.4μm的超细颗粒显示出比粒径约为20μm的原始FOX-7更低的感度。超细FOX-7的临界落高分别从129cm增加到172cm、142cm和136cm，摩擦感度分别从32%降低到8%、16%和20%。此外，超细颗粒的表观活化能相对于原材料有所增加，这表明超细颗粒的热稳定性得到了提高。
