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Heat-resistant and anti-crystal transition HNIW (hexanitrohexaazaisowurtzitane)-based mixed explosive and preparation method thereof

A technology of mixed explosives and crystal transformation, which is applied in explosives processing equipment, explosives, nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, etc., which can solve the problems of poor bearing capacity, structural and functional degradation, and decreased workability, etc. problem, to achieve the effect of increasing the crystal transformation temperature, promoting application, and good heat resistance

Inactive Publication Date: 2018-12-28
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

[0004] The present invention overcomes the deficiencies of the prior art, provides a heat-resistant and anti-crystallization HNIW-based mixed explosive and a preparation method thereof, obtains a HNIW-based mixed explosive with good heat resistance and high thermal crystallization temperature, and effectively solves the problem of HNIW explosives are prone to crystal transformation during actual use, leading to structural and functional degradation, decreased workability, and poor load-carrying capacity. This will help improve the structural stability and performance reliability of HNIW-based mixed explosives under the action of complex environments. It is expected that Promote the application of HNIW-based explosives in weaponry

Method used

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  • Heat-resistant and anti-crystal transition HNIW (hexanitrohexaazaisowurtzitane)-based mixed explosive and preparation method thereof
  • Heat-resistant and anti-crystal transition HNIW (hexanitrohexaazaisowurtzitane)-based mixed explosive and preparation method thereof
  • Heat-resistant and anti-crystal transition HNIW (hexanitrohexaazaisowurtzitane)-based mixed explosive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 0.446g of Tris salt and place it in a 250ml Erlenmeyer flask, measure 180ml of deionized water and 36ml of ethanol to dissolve, then add 0.27g of dopamine hydrochloride, and magnetically force it at a rate of 300r / min Stir until completely dissolved.

[0027] (2) Weigh 10g of unit cell embedded N 2 Add the HNIW-based host-guest explosive crystal of O molecules into the dopamine solution in step 1, and continue magnetic stirring for 24 hours to make dopamine in-situ polymerize on the crystal surface to form a dense coating layer, then filter, wash, and dry to obtain the surface-modified HNIW-based explosive crystal. Host-guest explosive crystals.

[0028] (3) Weigh 0.8g of polyurethane into a 150ml Erlenmeyer flask, add 50ml of chloroform, heat to 50°C, and magnetically stir at 300r / min until the polyurethane is completely dissolved.

[0029] (4) Add the surface-modified HNIW-based host-guest explosive crystal prepared in step 2 into the solution, continue ma...

Embodiment 2

[0032] (1) Weigh 0.5g of polydopamine nanoparticles into a 150ml Erlenmeyer flask, add 100ml of deionized water and stir magnetically at a rate of 400r / min to fully disperse the particles.

[0033] (2) Weigh 10g of unit cell embedded NO 2 Molecular HNIW-based host-guest explosive crystals are added to the polydopamine solution in step 1, and magnetic stirring is continued for 24 hours to allow the particles to aggregate on the crystal surface to form a dense coating layer, and then filtered, washed, and dried to obtain surface-modified HNIW-based host-guest Dynamite crystals.

[0034] (3) Weigh 1g of fluororubber into a 150ml Erlenmeyer flask, add 50ml of carbon tetrachloride, heat to 70°C, and magnetically stir at 200r / min until the fluororubber is completely dissolved.

[0035] (4) Add the surface-modified HNIW-based host-guest explosive crystal prepared in step 2 into the solution, continue magnetic stirring, use a vacuum pump to continuously pump air to volatilize the sol...

Embodiment 3

[0038] (1) Weigh 0.446g of Tris salt and place it in a 250ml Erlenmeyer flask, measure 180ml of deionized water and 36ml of ethanol to dissolve, then add 0.27g of dopamine hydrochloride, and magnetically force it at a rate of 600r / min Stir until completely dissolved.

[0039] (2) Weigh 10 g of HNIW-based host-guest explosive crystals with NO molecules embedded in the unit cells and add them to the dopamine solution in step 1, and continue magnetic stirring for 24 hours to make dopamine polymerize in situ on the crystal surface to form a dense coating layer, then filter, After washing and drying, surface-modified HNIW-based host-guest explosive crystals are obtained.

[0040] (3) Weigh 0.4g of styrene-butadiene rubber into a 150ml Erlenmeyer flask, add 50ml of chloroform, heat to 40°C, and magnetically stir at 600r / min until the polyurethane is completely dissolved.

[0041] (4) Add the surface-modified HNIW-based host-guest explosive crystal prepared in step 2 into the soluti...

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Abstract

The invention discloses a heat-resistant and anti-crystal transition HNIW (hexanitrohexaazaisowurtzitane)-based mixed explosive and a preparation method thereof. The preparation method comprises the following steps: A, adding HNIW-based subjective and objective explosives with active molecules embedded into unit cells into a surface modifier solution with strong adhesion performance so as to enable a modifier to self-assemble on the surfaces of crystals to form dense coating layers; B, dissolving an adhesive in a liquid medium, coating and granulating the modified HNIW crystals to prepare modified modelling powder; C, performing compression moulding on the modified modelling powder to obtain the HNIW-based mixed explosive with heat-resistant and anti-crystal transition performance. The mixed explosive prepared by the preparation method provided by the invention comprises the following components in percent by mass: 85-94% of the HNIW-based subjective and objective explosives, 0.5-5% ofthe surface modifier and 4-10% of the adhesive. According to the preparation method, the HNIW subjective and objective explosive crystals are used as raw materials for surface modification, so that the thermal crystal transition temperature of HNIW is increased by about 30 DEG C, and thus the heat resistance thereof is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of energetic material preparation, and in particular relates to a heat-resistant and crystal-resistance HNIW-based mixed explosive and a preparation method thereof. Background technique [0002] The rapid development of science and technology provides a solid support for modern high-performance weapons to achieve the goal of "precise strike and efficient damage". In order to make the weapon system have a higher damage capability, loading high energy density explosives is one of the most direct and effective technical approaches. As the elemental explosive with the highest energy density known to be practically applicable at present, hexanitrohexaazaisowurtzitane (HNIW, also known as CL-20) has been placed with high expectations once it came out. In the nearly 30 years since its discovery, the research on HNIW preparation technology, structure and performance has always been at the forefront of research hots...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B45/22C06B25/34C06B21/00
CPCC06B21/0075C06B25/34C06B45/22
Inventor 徐金江孙杰田勇张浩斌朱春华
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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