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High-quality explosive crystals prepared by self-assembling and preparation method thereof

A self-assembly, high-quality technology, applied in the direction of nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, etc., can solve the problems of low purity of high-quality explosive crystals, low yield of preparation methods, and difficult scale-up production, etc., to achieve The effect of short preparation cycle, low sensitivity and easy amplification

Active Publication Date: 2016-07-13
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the deficiencies of the prior art, and provides a self-assembled high-quality explosive crystal and its preparation method, in order to solve the problem of low purity and many defects of the existing high-quality explosive crystal, low yield of the preparation method, and difficulty in scaling up. production problem

Method used

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  • High-quality explosive crystals prepared by self-assembling and preparation method thereof
  • High-quality explosive crystals prepared by self-assembling and preparation method thereof
  • High-quality explosive crystals prepared by self-assembling and preparation method thereof

Examples

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Effect test

Embodiment 1

[0023] Step (1): Weigh 20g of HMX explosive at room temperature, dissolve it in 150g of dimethyl sulfoxide to make a solution, place it in a high-pressure spray tank with a pressure of 0.55MPa, and spray the explosive solution under the action of 60kHz ultrasound Carry out crystallization in cold water at a temperature of 5°C, and centrifuge the resulting suspension to obtain HMX fine particle explosives;

[0024] Step (2): Add the above-mentioned HMX fine particle explosive to a mixed solvent of water: acetone = 10:1 to form a suspension, pour it into a stainless steel reaction kettle, seal it, and use a heating rate of 5°C / min to program the temperature. Heating to 160°C, assembling reaction for 0.5h, cooling the reaction kettle, filtering, washing with deionized water, and drying to obtain high-quality explosive HMX crystals. figure 1 It is the scanning electron microscope image of the high-quality HMX explosive crystal obtained in this example, the particle shape is unifor...

Embodiment 2

[0026] Step (1): Weigh 20g of HMX explosive at room temperature, dissolve it in 80g of acetone to form a solution, place it in a high-pressure spray tank with a pressure of 0.68MPa, and spray the explosive solution to a temperature of 0.5 under the action of 120kHz ultrasonic waves. Crystallize in cold water at ℃, and centrifuge the resulting suspension to obtain HMX fine particle explosives;

[0027] Step (2): Add the above-mentioned HMX fine particle explosives into a mixed solvent of water: ethanol = 1:1 to form a suspension, pour it into a stainless steel reaction kettle, seal it, and use a heating rate of 1°C / min for temperature programming. Heating to 120°C, assembling for 3 hours, cooling the reaction kettle, filtering, washing with deionized water, and drying to obtain high-quality explosive HMX crystals. figure 2 The scanning electron microscope image of the high-quality HMX explosive crystal obtained in this example shows that the particle shape is uniform, the prod...

Embodiment 3

[0029] Step (1): Weigh 20g of LLM-105 explosive at room temperature, dissolve it in 200g of N,N-dimethylformamide to make a solution, put it in a high-pressure spray tank with a pressure of 0.52MPa, and under the action of 20kHz ultrasonic , spray the explosive solution into cold water at a temperature of 3°C for crystallization, and centrifuge the obtained suspension to obtain LLM-105 fine particle explosive;

[0030] Step (2): Add the above-mentioned LLM-105 fine particle explosive into a mixed solvent of water:N,N-dimethylformamide=500:1 to form a suspension, pour it into a stainless steel reaction kettle, seal it, and use 20°C / min heating rate for temperature programming, heating to 140°C, assembly reaction for 12 hours, cooling the reaction kettle, filtering, washing with deionized water, and drying to obtain high-quality explosive LLM-105 crystals. image 3 The scanning electron microscope image of the high-quality LLM-105 explosive crystal obtained in this example shows...

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Abstract

The invention discloses high-quality explosive crystals prepared by self-assembling and a preparation method thereof. The preparation method comprises the following steps: dissolving the explosive crystals and preparing fine-particle crystals by adopting spray crystallization; and subjecting fine-particle explosives to self-assembling reaction of fine particles in a mixed solvent through programmed heating, thereby obtaining the high-quality explosive crystals. The preparation method can be used for preparing various high-quality explosive crystals. The high-quality explosive crystals prepared by the preparation method are uniform in particle morphology, are smooth in crystal surface, are less in inner defects, are narrow in particle diameter distribution, are high in particle density, have crystal purity which is 99 percent or higher, and have sensitivity which is obviously reduced in comparison with that of common explosives. The method for preparing the high-quality explosive crystals is simple in process flow, is short in preparation period, is easy to magnify, and has a yield which is 95 percent or higher.

Description

technical field [0001] Embodiments of the present invention relate to the field of energetic materials, and more specifically, embodiments of the present invention relate to a self-assembled high-quality explosive crystal and a preparation method thereof. Background technique [0002] The crystal quality of explosives (such as purity, density, morphology, uniformity, particle size, crystal defects, etc.) has a significant impact on the safety performance of explosives such as mechanical sensitivity and shock wave sensitivity. The preparation of high-quality explosive crystals can not only greatly improve the safety performance of weapons and ammunition, but also help to further increase the output lethality. In recent years, many research institutions in China, the United States, Norway, France, Australia and other countries in the world have successively developed technical methods for preparing high-quality explosives based on cooling crystallization or solvent / anti-solven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/34
CPCC06B25/34
Inventor 杨志剑何冠松刘佳辉丁玲聂福德
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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