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Issue 36, 2019
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Preparation of multi-scale FOX-7 particles and investigation of sensitivity and thermal stability

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Abstract

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 H50 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.

Graphical abstract: Preparation of multi-scale FOX-7 particles and investigation of sensitivity and thermal stability

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Publication details

The article was received on 06 May 2019, accepted on 29 Jun 2019 and first published on 04 Jul 2019


Article type: Paper
DOI: 10.1039/C9RA03394G
RSC Adv., 2019,9, 21042-21049
  • Open access: Creative Commons BY license
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    Preparation of multi-scale FOX-7 particles and investigation of sensitivity and thermal stability

    R. Xu, C. An, H. Huang, J. Wang, B. Ye and B. Liu, RSC Adv., 2019, 9, 21042
    DOI: 10.1039/C9RA03394G

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