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Fine-particle high-energy low-sensitivity explosive compound and preparation method thereof

A compound and fine particle technology, applied in the direction of nitroalkane composition, etc., can solve the problems of poor safety performance of high-energy explosives, and achieve the effects of reduced mechanical sensitivity, good reproducibility, and mild reaction conditions

Active Publication Date: 2014-12-10
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

[0006] The purpose of the present invention is to provide a preparation method of fine-grained high-energy and low-sensitivity explosive compound. The method is to dissolve the polymer binder and explosive in an organic solvent, and obtain a uniform binder by one-step spray crystallization. The fine-grained explosives coated on the surface solve the technical problem of poor safety performance of existing high-energy explosives

Method used

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  • Fine-particle high-energy low-sensitivity explosive compound and preparation method thereof

Examples

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Embodiment 1

[0058] A kind of preparation method of fine particle high-energy low-sensitivity CL-20 explosive compound, the steps are as follows:

[0059] CL-20 explosive 5g, F2311 fluororubber 0.25g and ethyl acetate 100g were dissolved at a temperature of 40°C and a stirring rate of 500rpm to obtain an explosive composite solution of 5% by weight of the explosive;

[0060] Put the explosive composite solution in a spray tank with a volume of 800mL, increase the pressure in the spray tank to 0.4MPa by pumping air, and then spray the explosive composite solution into 1000mL n-heptane at a temperature of -10°C. The stirring rate of the heptane was 300 rpm. After the spraying was completed, the solid product was centrifuged, washed and dried to obtain 4.9 g of fine particle explosive compound.

[0061] The scanning electron microscope picture of the fine particle explosive compound of the present embodiment is as follows figure 1 It can be seen from the figure that the particle size of the ...

Embodiment 2

[0064] A kind of preparation method of fine particle high-energy low-sensitivity CL-20 explosive compound, the steps are as follows:

[0065] Dissolve 30g of CL-20 explosive, 0.6g of Estane polyurethane and 100g of N,N-dimethylformamide at a temperature of 60°C and a stirring rate of 250rpm to obtain an explosive composite solution of 30% by weight of the explosive;

[0066] Put the explosive composite solution in a spray tank with a volume of 800mL, increase the pressure in the spray tank to 0.7MPa by pumping air, then spray the explosive composite solution into 1000mL toluene at a temperature of 0°C, and the toluene is stirred during the spraying process The speed is 500rpm. After the spraying is finished, the solid product is centrifuged, washed and dried to obtain 27.6g of fine particle explosive compound.

[0067] The scanning electron microscope picture of the fine particle explosive compound of the present embodiment is as follows figure 2 It can be seen from the figu...

Embodiment 3

[0070] A kind of preparation method of fine particle high-energy low-sensitivity CL-20 explosive compound, the steps are as follows:

[0071] CL-20 explosive 5g, F2311 fluororubber 0.25g and butyl acetate 100g were dissolved at a temperature of 50°C and a stirring rate of 350rpm to obtain an explosive composite solution of 5% by weight of the explosive;

[0072] Put the explosive composite solution in a spray tank with a volume of 800mL, increase the pressure inside the spray tank to 0.3MPa by pumping air, then spray the explosive composite solution into 1000mL n-heptane at a temperature of -10°C, during the spray process The heptane was placed in an ultrasonic device with an ultrasonic frequency of 100 Hz. After the spraying was completed, the solid product was centrifuged, washed, and dried to obtain 4.7 g of a fine particle explosive compound.

[0073] The scanning electron microscope picture of the fine particle explosive compound of the present embodiment is as follows ...

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Abstract

The invention relates to a fine-particle high-energy low-sensitivity explosive compound and a preparation method thereof. The method comprises the following steps: mixing an explosive with a macromolecular bonder according to a weight part ratio of 100 to (2-5), and stirring at 40-60 DEG C for dissolving in an organic solvent to obtain an explosive compound solution with 5%-30% by weight of explosives; putting the explosive compound solution into an ejection tank, pumping air into the ejection tank to increase the pressure in the ejection tank to be 0.3-0.7MPa, ejecting the explosive compound solution into an explosive antisolvent with the temperature of -10 DEG C to 10 DEG C, performing centrifugal separation on a solid product, washing, and drying to obtain the explosive compound. According to the explosive compound, explosive particles are micron-sized, the CL-20 surface is densely wrapped with the macromolecular bonder in the form of an interwoven mesh shape, the impact sensitivity of the wrapped CL-20 is reduced to be 24%-40% from 100%, and the friction sensitivity is reduced to be 66%-92% from 100%.

Description

【Technical field】 [0001] The invention relates to a fine particle high-energy low-sensitivity explosive compound and a preparation method thereof. 【Background technique】 [0002] The high-energy explosive hexanitrohexaazaisopentazane (CL-20) is the single-substance explosive with the highest energy actually used in military weapons and equipment. It is a new type of clathrate compound with high energy density and high detonation velocity. Octojin (HMX) is 10-15% higher. However, CL-20 has high impact sensitivity, friction sensitivity, and electrostatic spark sensitivity, and its safety performance is poor. It has become one of the current research hotspots in the field of high-energy materials to study its desensitization by using crystallization technology, micro-nano technology and coating technology. Among them, coating polymer binder and other inert materials on the surface of CL-20 to prepare polymer bonded explosive (PBX) is one of the most effective ways to reduce s...

Claims

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Application Information

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IPC IPC(8): C06B25/40
Inventor 杨志剑丁玲潘丽萍吴鹏聂福德
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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