Low-sensitivity and high-strength octogen-based composite material and preparation method thereof

A technology for octogen and composite materials, which is applied in the field of low-sensitivity and high-strength octogen-based composite materials and their preparation, which can solve the problem that the safety performance and mechanical properties of the energy-containing composite cannot be achieved, and the safety performance and mechanical properties are difficult to balance and increase. Problems such as the interfacial interaction between explosive crystals and polymer binders, to achieve the effects of easy scale-up preparation, improved mechanical properties, and good reproducibility

Active Publication Date: 2019-09-06
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

Through physical interlocking and chemical interaction, the interface interaction between explosive crystals and polymer binders can be effectively increased (J.Mater.Chem.A, 2017,5,13499-13510), but desensitization cannot be achieved (Chem.Eng .J.2017,309,140-150)
[0005] Therefore, aiming at the problem that it is difficult to balance the safety and mechanical properties of energetic composites in the prior art, the present invention discloses a low-sensitivity high-strength Octokin-based composite material and its preparation method

Method used

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  • Low-sensitivity and high-strength octogen-based composite material and preparation method thereof
  • Low-sensitivity and high-strength octogen-based composite material and preparation method thereof
  • Low-sensitivity and high-strength octogen-based composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] like figure 1 As shown, step 1: add 90g octogen (HMX) into ultrapure water, ultrasonically disperse for 30min, and then add 10g nano-energy-containing material crystal 1,3,5-triamino-2 after ultrasonic dispersion for 30min, 4,6-Trinitrobenzene (TATB) aqueous suspension, ultrasonic treatment for 30min, suction filtration, washing and drying to obtain HMX@TATB core-shell structure explosive particles;

[0030] Step 2: Add 100 g of the core-shell structure explosive particles obtained in step (1) to 3 L of buffered aqueous solution with a pH of about 8.5, stir mechanically, add 6 g of dopamine hydrochloride, in-situ polymerize and coat for 6 hours, filter, wash, dry Drying to obtain HMX@TATB@PDA one-core double-shell structure explosive particles whose inner shell is passivation material TATB and outer shell is interface modifier polydopamine (PDA);

[0031] Step 3: granulation by water suspension method: take 95g of the one-core and double-shell structure explosive parti...

Embodiment 2

[0033] Step 1: Add 80 g of Octochrome (HMX) to the dichloroethane solution of the polyurethane-polyester copolymer (Estane), stir mechanically for 30 minutes, filter, and dry; add the surface-treated Octane to the solution. In ultrapure water, ultrasonically dispersed for 30min, then add 20g of nano-energy material crystal 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) aqueous suspension after ultrasonic dispersion for 30min, ultrasonically After treatment for 30min, suction filtration, washing and drying to obtain HMX@TATB core-shell structure explosive particles;

[0034] Step 2: Add 100 g of the core-shell structure explosive particles obtained in step (1) to 3 L of buffered aqueous solution with a pH of about 8.5, stir mechanically, add 6 g of dopamine hydrochloride, in-situ polymerization and coating for 3 hours, suction filtration, washing, drying Drying to obtain HMX@TATB@PDA one-core double-shell structure explosive particles whose inner shell is passivation material TATB...

Embodiment 3

[0037] Step 1: Add 99.5g of Octogen (HMX) to ultrapure water, stir mechanically at 450rpm for 12min, heat up to 40°C, then dropwisely add 25g of 2% No. 58 petroleum ether solution of paraffin, suction filtration , washing and drying to obtain HMX@58 paraffin core-shell structure explosive particles;

[0038] Step 2: Add 100 g of the core-shell structure explosive particles obtained in step (1) to 3 L of buffered aqueous solution with a pH of about 8.5, stir mechanically, add 6 g of dopamine hydrochloride, in-situ polymerization and coating for 3 hours, suction filtration, washing, drying Drying to obtain HMX@58 paraffin@PDA one-core and double-shell structure explosive particles whose inner shell is the passivation material No. 58 paraffin, and the outer shell is the interface modifier polydopamine (PDA);

[0039] Step 3: granulation by water suspension method: take 95g of the single-core double-shell structure explosive particles obtained in step (2) and add it to 90mL of wat...

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Abstract

The invention discloses a low-sensitivity and high-strength octogen-based composite material and a preparation method thereof. The preparation method comprises the following steps: (1) adding octogeninto a certain solvent, performing uniform dispersing, performing in situ coating with a passivation material, and carrying out suction filtration, washing and drying to obtain an octogen@passivationmaterial core-shell structured explosive particles; (2) adding the octogen@passivation material core-shell structured explosive particles to an aqueous Tris solution with a pH value of 8.5, performingmechanic stirring, adding dopamine hydrochloride, and carrying out in-situ polymerization coating, suction filtration, washing and drying to obtain octogen@passivation material@polydopamine one-coredouble-shell structured explosive particles with the passivation material as the inner shell and an interface modifier polydopamine as an outer shell; and (3) adding the one-core double-shell structured explosive particles to water, performing mechanic stirring to achieve uniform dispersing, adding a polymer binder solution, and carrying out vacuum treatment, suction filtration, washing and dryingto obtain the low-sensitivity and high-strength octogen-based composite material.

Description

technical field [0001] The invention relates to the technical field of energy-containing composite materials, in particular to a low-sensitivity and high-strength octogen-based composite material and a preparation method thereof. Background technique [0002] Octoren (HMX) is a single-mass explosive with the best comprehensive performance, and is widely used in missile warhead charges, anti-tank charges, additives for rocket propellants and main explosives for detonating nuclear weapons. However, octogen is sensitive to external mechanical and thermal stimuli and weak interface with polymer binders, resulting in poor mechanical properties, which limit its application in the field of energetic materials. Therefore, the development of low-sensitivity and high-strength HMX-based composite materials can significantly reduce its mechanical sensitivity and improve mechanical properties while maintaining excellent detonation performance, improving the safety and security of weapon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B21/00C06B45/26C06B45/22
CPCC06B21/0066C06B21/0083C06B45/22C06B45/26
Inventor 林聪妹黄兵巩飞艳杨志剑曾诚成丁玲潘丽萍张建虎
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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