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1, 1-diamino-2, 2-dinitroethylene/nano aluminum powder composite energetic particle as well as preparation method and application thereof

A technology of dinitroethylene and nano-aluminum powder is applied in attack equipment, explosives processing equipment, explosives and other directions to achieve the effects of narrow particle size distribution, simple process and stable morphology

Active Publication Date: 2022-08-09
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for precise control over how small aluminum nitride (AIN) pellets are made by mixing them with other materials like magnesium oxide or silicon dioxide. It also includes methods that create these composites through various techniques such as spray dried processes. These new components result in improved performance characteristics compared to existing ones due to their smaller sizes and better stability during use.

Problems solved by technology

The technical problem addressed by this patented technology relates to improving the efficiency at detonating an expanding shock waves generated during blastings without causing harm or losing valuable equipment. This requires that certain materials like aluminium should also improve their thermal conductivity for better energy transfer between different parts within the system.

Method used

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  • 1, 1-diamino-2, 2-dinitroethylene/nano aluminum powder composite energetic particle as well as preparation method and application thereof
  • 1, 1-diamino-2, 2-dinitroethylene/nano aluminum powder composite energetic particle as well as preparation method and application thereof
  • 1, 1-diamino-2, 2-dinitroethylene/nano aluminum powder composite energetic particle as well as preparation method and application thereof

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preparation example Construction

[0028] The present invention provides a method for preparing 1,1-diamino-2,2-dinitroethylene / nano-aluminum powder composite energetic particles according to the above technical solution, which includes the following steps:

[0029] Mixing 1,1-diamino-2,2-dinitroethylene, a binder, nano-aluminum powder and an organic solvent, and dispersing the obtained mixed solution to obtain a suspension;

[0030] The suspension is spray-dried to obtain 1,1-diamino-2,2-dinitroethylene / nano-aluminum powder composite energetic particles.

[0031]In the present invention, the organic solvent preferably includes one or more of N,N-dimethylformamide, dimethyl sulfoxide, N,N-diethylformamide and N-methylpyrrolidone; The mass ratio of the 1,1-diamino-2,2-dinitroethylene to the organic solvent is preferably 2:98 to 5:95, more preferably 4:96. In the present invention, the mixing method is preferably: dissolving 1,1-diamino-2,2-dinitroethylene and a binder in an organic solvent, and then adding nano...

Embodiment 1

[0037] In this embodiment, the formula composition (mass percentage) of 1,1-diamino-2,2-dinitroethylene / nano-aluminum powder composite energetic particles is as follows:

[0038] Main component: 1,1-diamino-2,2-dinitroethylene (FOX-7) 65%, nano-aluminum powder (nAl, spherical, particle size 50-100nm) 30%; binder: difluoride Ethylene-hexafluoropropylene copolymer (F 2602 ) 5%.

[0039] The preparation method is as follows:

[0040] (1) Weigh a certain quality of F according to the composition of the formula 2602 and FOX-7 dissolved in N,N-dimethylformamide, the mass ratio of FOX-7 and N,N-dimethylformamide is 4:96; Weigh a certain mass of nAl and place it in the FOX-7 solution , to obtain a mixed solution;

[0041] (2) under the temperature of 25 ℃, the mixed solution configured in step (1) is placed in an ultrasonic disperser, the power of ultrasonic is 300W, and a mechanical stirrer is used to stir at the same time, and the stirring speed is 600rpm, and the ultrasonic wav...

Embodiment 2

[0046] In this example, the mass percentages of FOX-7 and nAl are 75% and 20%, respectively, and the rest are the same as in Example 1.

[0047] The scanning electron microscope image and particle size distribution of the prepared FOX-7 / nAl composite energetic particles are as follows image 3 and Figure 4 shown. Depend on image 3 It can be seen that the sphericity of the FOX-7 / nAl composite energetic particles is general, and it can be seen that there is a bulk FOX-7 crystal structure on the surface, and the promotion effect of nAl on the formation of crystal nuclei is weakened, but no nAl agglomeration phenomenon is observed, indicating that FOX-7 and F 2602 Better cladding of nAl. Depend on Figure 4 It can be seen that the particle size distribution range of the FOX-7 / nAl composite energetic particles is 1.0-2.5 μm, and the particle size distribution is concentrated.

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Abstract

The invention provides a 1, 1-diamino-2, 2-dinitroethylene/nano aluminum powder composite energetic particle as well as a preparation method and application thereof, and relates to the technical field of explosives. The 1, 1-diamino-2, 2-dinitroethylene/nano aluminum powder composite energetic particle provided by the invention is of a core-shell structure and comprises nano aluminum powder, and 1, 1-diamino-2, 2-dinitroethylene and an adhesive which are coated on the surface of the nano aluminum powder. According to the composite energetic particle provided by the invention, the nano aluminum powder is taken as a core, the 1, 1-diamino-2, 2-dinitroethylene and the adhesive are taken as a shell, and the 1, 1-diamino-2, 2-dinitroethylene, the adhesive and the nano aluminum powder are tightly combined to form a uniform coating structure, so that the spontaneous agglomeration of the nano aluminum powder can be effectively inhibited; the problem of non-uniform component distribution of the nano aluminum-containing explosive is solved, and the heat and mass transfer distance among the components is reduced, so that the energy release rate of the detonation reaction of the explosive and the reaction completeness of the nano aluminum powder are enhanced.

Description

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Claims

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Application Information

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Owner ZHONGBEI UNIV
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