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High-density heatproof octogen-based compound and preparation method thereof

An octogen and compound technology, which is applied in the field of high-density heat-resistant octogen-based composites and preparation, can solve the problem that the β→δ crystal transformation temperature is not increased enough, and the explosive compound has low density and cannot be used. Effectively improve the heat resistance of Octo and other issues

Inactive Publication Date: 2017-06-30
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in the β→δ crystal transformation temperature is not high enough to effectively improve the heat resistance of Octogen
Moreover, the complex preparation method is complicated, and toluene is used as the medium, which is harmful to personnel and the environment
In addition, a large amount of low-density insensitive material coating will lead to low density of explosive compounds, which is not good for the energy of explosives

Method used

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  • High-density heatproof octogen-based compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A, Octojin pretreatment

[0036] Dissolve Tris in water to prepare a 10mM Tris solution, then add hydrochloric acid dropwise to prepare a Tris buffer solution with a pH value of 8.5; add Octogen to the Tris buffer solution, and the amount of Octogen added is 50g / L , then mechanical stirring (stirring speed: 500rpm) mixture becomes uniform octogen suspension; Blow into oxygen in octogen suspension; Dopamine hydrochloride is added in octogen suspension, the concentration of dopamine hydrochloride is 2g / L; continue to stir mechanically at room temperature (stirring rate: 500rpm) for 3 hours, filter with suction, and dry in vacuum to obtain Octogen / polydopamine. According to high-performance liquid chromatography analysis, the mass fraction of Octogen in Octogen / polydopamine accounts for 99.0%, and the mass fraction of polydopamine accounts for 1.0%.

[0037] B, Preparation of Octogenyl Complex by Slurry Method

[0038]Add 20.0 g of Octogen / polydopamine obtained through s...

Embodiment 2

[0041] A, Octojin pretreatment

[0042] Dissolve Tris in water to prepare a 20mM Tris solution, then add hydrochloric acid dropwise to prepare a Tris buffer solution with a pH value of 8.5; add Octogen to the Tris buffer solution, and the amount of Octogen added is 30g / L , then mechanical stirring (stirring speed: 500rpm) mixture becomes uniform octogen suspension; Blow into oxygen in octogen suspension; Dopamine hydrochloride is added in octogen suspension, the concentration of dopamine hydrochloride is 5g / L; after continuing mechanical stirring (stirring rate: 400rpm) at room temperature for 6 hours, suction filtration, and vacuum drying to obtain Octogen / polydopamine. According to high-performance liquid chromatography analysis, the mass fraction of Octogen in Octogen / polydopamine accounts for 97.9%, and the mass fraction of polydopamine accounts for 2.1%.

[0043] B, Preparation of Octogenyl Complex by Slurry Method

[0044] Add 20.0 g of Octogen / polydopamine obtained th...

Embodiment 3

[0047] A, Octojin pretreatment

[0048] Dissolve Tris in water to prepare a 30mM Tris solution, then add hydrochloric acid dropwise to prepare a Tris buffer solution with a pH value of 8.5; add Octogen to the Tris buffer solution, and the amount of Octogen added is 20g / L , then mechanical stirring (stirring speed: 400rpm) mixture becomes uniform octogen suspension; Blow into oxygen in octogen suspension; Dopamine hydrochloride is added in octogen suspension, the concentration of dopamine hydrochloride is 5g / L; continue to stir mechanically at room temperature (stirring rate: 300rpm) for 24 hours, filter with suction, and dry in vacuum to obtain Octogen / polydopamine. According to high-performance liquid chromatography analysis, the mass fraction of Octogen in Octogen / polydopamine accounts for 96.9%, and the mass fraction of polydopamine accounts for 3.1%.

[0049] B, Preparation of Octogenyl Complex by Slurry Method

[0050] Add 20.0 g of Octogen / polydopamine obtained through...

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Abstract

The invention discloses a high-density heatproof octogen-based compound and a preparation method thereof. According to the invention, polydopamine produced after oxidation and self-polymerization of dopamine forms a strongly-adhesive interfacial action layer on the surface of octogen in advance, and then a high-density heatproof fluorine-containing polymer binder is used for coating, so crystal transfer of octogen under high temperature is inhibited and the density of an explosive compound is improved. The high-density heatproof octogen-based compound comprises, by weight, 88.0 to 96.5 wt% of octogen, 1.0 to 6.0 wt% of polydopamine and 2.0 to 6.0 wt% of the fluorine-containing polymer binder. The octogen-based compound has the characteristics of a high beta-to-delta crystal transfer temperature, higher than about 40 DEG C compared with a raw octogen material, and high density, and is expected to be applied to high-energy heatproof explosives.

Description

technical field [0001] The invention relates to the field of energetic materials, in particular to a high-density heat-resistant octogen-based compound and a preparation method thereof. Background technique [0002] The scientific name of Octojin (HMX) is 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane. It is the single-substance explosive with the best energy level and comprehensive performance widely used in explosives, propellants and pyrotechnic materials. At present, mixed explosives based on Octojin are used for various warhead charges such as missiles and van tank bombs, or as heat-resistant explosives for deep well perforating bombs and as high-performance solid propellants and guns for launching Components of the medicine. For example, LX-07 (90.0wt.% Octojin / 10.0wt.% viton A), LX-10 (95.0wt.% Octojin / 5.0wt.% Viton A), LX-14 (95.5wt.% Octojin / 4.5wt.% polyurethane) are used to load a variety of warheads. [0003] There are four crystal forms of α, β, γ and δ in Oc...

Claims

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Application Information

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IPC IPC(8): C06B25/34C06B23/00
CPCC06B23/006C06B23/009C06B25/34
Inventor 巩飞艳丁玲杨志剑刘世俊
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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