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Preparation method of hexanitrohexaazaisowurtzitane and 2,5-dinitrotoluene eutectic explosive

A technology of hexanitrohexaazane and isowurtzitane is applied in the field of preparation of hexanitrohexaazaisowurtzitane and 2,5-dinitrotoluene eutectic explosive, and can solve the problems of low melting point, density and energy, There are no problems such as public literature reports and safety defects, and the effects of reducing sensitivity, convenient operation and increasing melting point are achieved.

Active Publication Date: 2015-08-26
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hexanitrohexaazaisowurtzitane (CL-20) is currently the elemental explosive with the highest energy density, and its energy level (detonation velocity , explosion pressure and total energy output, etc.) are second to none, but its friction sensitivity, impact sensitivity, and electrostatic spark sensitivity are all higher than HMX, and there are huge defects in safety, which greatly restricts its application.
2,5-Dinitrotoluene (DNT) is a less sensitive energetic material, but its melting point, density and energy are correspondingly lower
At present, there is no public literature report on the preparation of CL-20 / 2,5-DNT eutectic explosive

Method used

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  • Preparation method of hexanitrohexaazaisowurtzitane and 2,5-dinitrotoluene eutectic explosive
  • Preparation method of hexanitrohexaazaisowurtzitane and 2,5-dinitrotoluene eutectic explosive
  • Preparation method of hexanitrohexaazaisowurtzitane and 2,5-dinitrotoluene eutectic explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 1 mmol of CL-20 and 2 mmol of 2,5-DNT in a weighing bottle, add 5 mL of ethyl acetate at room temperature, and ultrasonically shake the mixture until the solids are completely dissolved to obtain a saturated mixture of CL-20 and 2,5-DNT. crystallization solution. After the sealing film is sealed, puncture 8 small holes with a pin, and let it stand at room temperature for 3 days. The solvent ethyl acetate volatilizes, and pale yellow transparent crystal particles are precipitated. After filtering, washing and drying, CL-20 / 2,5-DNT eutectic explosive crystals are obtained. . Crystals with excellent morphology were selected for single crystal X-ray diffraction crystal structure analysis, and figure 2 The molecular structure ellipsoid diagram and image 3 The crystal structure stacking diagram shown shows that there is one CL-20 molecule and two DNT molecules in a single lattice, and a dense crystal structure is formed, and the nitro oxygen atom of CL-20 and the hy...

Embodiment 2

[0017] Weigh 1 mmol of CL-20 and 2 mmol of 2,5-DNT in a weighing bottle, add 5 mL of acetone at room temperature, and ultrasonically shake the mixture until the solids are completely dissolved to obtain a mixed saturated crystallization solution of CL-20 and 2,5-DNT . After sealing with a parafilm, make some small holes, let it stand at room temperature for 3 days, the solvent acetone volatilizes, and a light yellow transparent block crystal is precipitated. After filtering, washing and drying, the eutectic explosive of CL-20 and 2,5-DNT is obtained. The crystal was detected by infrared spectroscopy, and the absorption spectrum obtained was compared with that of elemental CL-20 and 2,5-DNT. Figure 5 shown. Analyze the attribution of the main absorption peaks, the most characteristic one is in the C-H stretching vibration region around 3000cm-1, the eutectic molecule shows two absorption peaks at 3033cm-1 and 3107cm-1, which belong to the C-H stretching vibration spectrum of ...

Embodiment 3

[0019] Weigh 1 mmol of CL-20 and 2 mmol of 2,5-DNT in a weighing bottle, add 20 mL of methanol at room temperature, and ultrasonically shake the mixture until all solids are dissolved to obtain a mixed saturated crystallization solution of CL-20 and 2,5-DNT . After sealing with a parafilm, make 8 small holes, let the solvent methanol volatilize at room temperature, and crystals are precipitated. After filtering, washing and drying, the eutectic explosive of CL-20 / 2,5-DNT is obtained. Differential scanning calorimetry (DSC) was performed on the obtained eutectic, and compared with the DSC curves of elemental CL-20 and 2,5-DNT such as Image 6 Show. The melting point of CL-20 / 2,5-DNT eutectic explosive is 122.6°C, which is significantly higher than the 72.4°C of DNT, which proves that the thermal stability has been significantly improved; the thermal decomposition temperature is 215.8°C, which is higher than that of CL- The temperature of 20 at 250.0℃ has decreased significant...

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Abstract

The invention discloses a reparation method of a hexanitrohexaazaisowurtzitane (CL-20) and 2,5-dinitrotoluene (DNT) eutectic explosive and belongs to the field of energetic materials. Based on the mechanism of eutectic formation, a novel high-energy and low-sensitivity eutectic explosive is formed by high-energy and high-sensitivity CL-20 and low-sensitivity DNT through intermolecular hydrogen bonds. The preparation method is of significance on search of the energetic materials and is an effective modification means for a high-energy explosive. The preparation method specifically comprises the following steps: adding the CL-20 and DNT in a molar ratio of 1: 2 at normal temperature into a proper amount of a crystallizing agent; carrying out ultrasonic oscillation and uniformly mixing to obtain a saturated crystallizing solution; and slowly evaporating a solvent at room temperature; and washing and drying to obtain the light yellow CL-20 and DNT eutectic explosive. According to the CL-20 / 2,5-DNT eutectic explosive prepared by the preparation method, the density and smelting point are remarkably improved compared with those of DNT. The eutectic explosive as a novel insensitive explosive has a relatively broad application prospect and is simple in process flow and mild in experimental condition. The product is good in safety and relatively high in quality.

Description

technical field [0001] The invention belongs to the field of energetic materials, and in particular relates to a preparation method of hexanitrohexaazaisowurtzitane (CL-20) and 2,5-dinitrotoluene (DNT) eutectic explosives. The invention relates to high-energy insensitive explosives has a good application prospect. Background technique [0002] With the changes in the modern battlefield situation, the requirements for explosives are getting higher and higher. While requiring high detonation velocity and high energy, explosives are also required to have better safety, so as to avoid accidents and explosions during transportation and use. . Therefore, the two seemingly contradictory properties of high energy and low sensitivity have become the highest pursuit goals of researchers in the field of energetic materials. At present, the traditional modification methods of elemental explosives include recrystallization, compounding and coating, etc., but the traditional modificatio...

Claims

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Application Information

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IPC IPC(8): C06B25/34
Inventor 刘可张皋苏鹏飞栾洁玉徐敏陈智群潘清陆洪林舒远杰李晓宇王民昌
Owner XIAN MODERN CHEM RES INST
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