Fabrication of Nanoparticle-Stacked 1,1-Diamino-2,2-Dinitroethylene (FOX-7) Microspheres with Increased Thermal Stability

Yuan, Yunfei; Hou, Conghua; Jia, Xiaoqing; Wang, Jinyu; Tan, Yingxin

doi:10.1155/2019/2981796

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Spray-drying can easily control the composition and particle size of a product. It has been extensively used in the preparation of energetic materials [15][16][17]. For instance, a kind of aluminum/HMX nanocomposite was prepared by Zhigach et al [18] successfully with the spray-drying method, with the distribution of the components uniform.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of RDX/Aluminum Composites by Spray-Drying Method

Sun

et al. 2020

Journal of Nanomaterials

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RDX/aluminum composites were prepared by the spray-drying method with F2602 as a binder. The morphology and covering effect of composites were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The effect of the processing parameters on the morphology of the samples was investigated. The impact sensitivity and thermal decomposition behavior of RDX/aluminum composites were also measured and analyzed. Optimal morphology of samples was achieved when the inlet temperature, nitrogen flow rate, and suspension feed flow rates were 80°C, 473 L·h-1, and 4.5 mL·min-1, respectively. In addition, RDX/aluminum composites with the same content were prepared by a coverage-mixing method for comparative analysis. Experimental results showed that the thermal sensitivity and the impact sensitivity of RDX/aluminum composites prepared by the spray-drying method were significantly lower than those of RDX/aluminum composites prepared by the coverage-mixing method.

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Section: Introductionmentioning

confidence: 99%

Preparation and Properties of RDX/Aluminum Composites by Spray-Drying Method

Sun

et al. 2020

Journal of Nanomaterials

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“…As shown in Figure 6 , three different samples had a similar exothermic decomposition process, which indicated that solid-phase decomposition kinetics dominated their thermal decomposition process. The DSC curves showed the first endothermic peak for the β → γ phase transition [ 21 ] and the second endothermic peak for the γ → δ transition [ 22 ]. After the phase transitions, there were two successive exothermic decomposition processes of FOX-7: the first with the peak at ca.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Viton@FOX-7@Al Spherical Composite with Improved Thermal Decomposition Property and Safety Performance

Yang

Song

et al. 2021

Materials

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To achieve a uniform distribution of the components and a better performance of aluminized composite explosives, Viton (dipolymers of hexafluoropropylene and vinylidene fluoride) @ FOX-7 (1,1-diamino-2,2-dinitroethylene) @Al microspheres and FOX-7/Viton@Al were synthesized by spray-drying strategy contrastively. Viton@FOX-7@Al owned porous and loose morphology and good sphericity with a retained crystal phase of FOX-7 and aluminum. The 23.56% fluorine content on Viton@FOX-7@Al surface indicated that Viton was completely coated on the surface of the particles. Nanosized aluminum (nAl) in Viton@FOX-7@Al had a certain catalytic activity on the thermal decomposition process of FOX-7 resulting in a depressed exothermic peak temperature and reduced apparent activation energy relative to nAl in FOX-7/Viton@Al. Because of the specific structure and the synergies between each individual component, Viton@FOX-7@Al showed reduced impact sensitivity and friction sensitivity than those of FOX-7/Viton@Al. In brief, Viton@FOX-7@Al with multilevel coating structure possessed comparatively low thermal decomposition energy requirement and improved safety performance.

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“…The sensitivity of nano-spherical FOX-7 particles is reduced, and the thermal stability is improved as compared to raw FOX-7. Yuanping Zhang et al 8 used spray-drying method to prepare nanoparticle-stacked FOX-7 microspheres. The particle size of the microspheres FOX-7 formed by stacking nanoparticles (100–250 nm) is 1–5 μm, which is significantly smaller than the raw FOX-7.…”

Section: Introductionmentioning

confidence: 99%