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A core-shell type composite explosive prepared by surface seed adsorption-induced growth and its preparation method

A technology of core-shell type and explosives, which is applied in the direction of explosives processing equipment, explosives, explosives composite components, etc., can solve the problems of high mechanical sensitivity of high-energy nitramine explosives, achieve controllable coating content, solve the problem of excessive mechanical sensitivity and high yield high effect

Active Publication Date: 2018-02-27
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

[0005] The present invention overcomes the deficiencies of the prior art, and provides a core-shell composite explosive prepared by adsorption-induced growth of surface seeds and a preparation method thereof, which are used to solve the technical problem of high mechanical sensitivity of high-energy nitramine explosives

Method used

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  • A core-shell type composite explosive prepared by surface seed adsorption-induced growth and its preparation method
  • A core-shell type composite explosive prepared by surface seed adsorption-induced growth and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step (1): take 20g of CL-20 explosives, disperse it in 120g concentration of 0.2% PDDA solution, let stand for 1h, filter, wash with deionized water, then immerse in 120g concentration of 0.2% PSS solution, After standing for 1 hour, filtering, and washing with deionized water, immerse again in 120 g of PDDA solution with a concentration of 0.2%, let stand for 1 hour, filter, wash with deionized water, and dry to obtain a nuclear layer explosive modified by surface charge;

[0031] Step (2): Disperse 1g of nanoscale powdery TATB explosive in 100g of water, apply 100kHz ultrasonic treatment for 10min to obtain a uniform suspension, and then apply the surface charge modified nuclear layer nitramine explosive obtained in step (1) Add to the suspension, stir at 200rpm for 30min, let stand for 5min, filter the material, wash with deionized water, and dry to obtain the seed crystal adsorption explosive.

[0032] Step (3): The seed crystal adsorption explosive obtained in step...

Embodiment 2

[0035] Step (1): take 100g of CL-20 explosives, disperse it in 450g concentration of 0.5% PDDA solution, let stand for 1h, filter, wash with deionized water, then immerse in 450g concentration of 0.5% PSS solution, After standing for 1h, filtering, and washing with deionized water, immerse again in 450g of PDDA solution with a concentration of 0.5%, let stand for 1h, filter, wash with deionized water, and dry to obtain the nuclear layer explosive after surface charge modification;

[0036] Step (2): Disperse 10g of nanoscale powdery TATB explosive in 1000g of water, apply 80kHz ultrasonic treatment for 30min to obtain a uniform suspension, and then apply the surface charge modified nuclear layer nitramine explosive obtained in step (1) Add it into the suspension, stir at 250rpm for 15min, let stand for 15min, filter the material, wash with deionized water, and dry to obtain the seed crystal adsorption explosive.

[0037] Step (3): The seed adsorption explosive obtained in step...

Embodiment 3

[0040] Step (1): Take 10g of HMX explosives, disperse it in 400g concentration of 0.05% PDDA solution, let stand for 1.5h, filter, wash with deionized water, then immerse in 400g concentration of 0.05% PSS solution, static After standing for 1.5h, filtering, and washing with deionized water, immerse again in 400g of PDDA solution with a concentration of 0.05%, let stand for 1.5h, filter, wash with deionized water, and dry to obtain the nuclear layer explosive after surface charge modification;

[0041] Step (2): Disperse 0.8g of nanoscale powdery TATB explosive in 200g of water, apply 50kHz ultrasonic treatment for 15min to obtain a uniform suspension, and then apply the surface charge-modified nuclear layer nitramine obtained in step (1) Add explosives to the suspension, stir at 600 rpm for 45 minutes, let stand for 10 minutes, filter the material, wash with deionized water, and dry to obtain explosives adsorbed by seeds.

[0042] Step (3): adding the seed adsorption explosiv...

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Abstract

The invention discloses a core-shell type composite explosive prepared by surface seed crystal absorption and induced growth and a preparation method thereof. The core-shell type composite explosive uses a high-energy nitramine explosive as the core layer and TATB as the wrapping shell layer and is prepared by core-layer explosive surface charge modification, nano TATB explosive seed crystal absorption and shell-layer TATB surface in-situ growth. The preparation method specifically includes: dispersing the high-energy nitramine explosive into polyelectrolyte aqueous solution, sequentially evenly wrapping the dispersed high-energy nitramine explosive with a layer of cations, a layer of anions and a layer of cationic polyelectrolyte, placing into dispersing liquid containing nano TATB seed crystals to perform particle absorption, drying, and growing a layer of TATB shell layer on the surface of the nitramine explosive in an in-situ manner through amination reaction under seed crystal induction to obtain the core-shell type composite explosive. The preparation method has the advantages that the method is simple in process and high in yield, and the prepared core-shell type composite explosive is compact in wrapping layer, high in energy, low in sensitivity and high in application value in weapon systems such as high-explosive armor piercing and high-explosive bombs.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, more specifically, the invention relates to a core-shell type composite explosive prepared by adsorption-induced growth of surface seeds and a preparation method thereof. Background technique [0002] The molecules of nitroamine explosives hexanitrohexaazaisopentazane (CL-20), cyclotetramethylenetetranitroamine (HMX), and cyclotrimethyltrinitramine (RDX) contain nitrogen-nitro groups, With high energy density characteristics, it is the most typical third-generation and second-generation energetic material, and has a wide range of military applications in the fields of high-efficiency damage and penetrating weapons. However, the safety performance of these high-energy nitramine explosives is poor, which is characterized by high impact sensitivity and friction sensitivity, which makes certain safety risks exist in the preparation, transportation, storage and use of weapons an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B25/34C06B25/04C06B21/00
CPCC06B21/0008C06B25/04C06B25/34
Inventor 杨志剑丁玲张建虎聂福德
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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