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Co-self-assembled explosive with dense unit cell accumulation structure and preparation method thereof

A self-assembly and explosive technology, which is used in explosive processing equipment, explosives, nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, etc., can solve the detonation performance of modified HNIW explosives, reduce HNIW energy density, reduce HNIW sensitivity and other issues, to achieve the effect of inhibiting the formation of hot spots, excellent safety performance, and improving safety

Active Publication Date: 2019-11-29
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

[0003] Scholars at home and abroad have developed a variety of technical means to regulate the performance of HNIW, such as crystal quality improvement, explosive crystal surface modification and coating, energetic eutectic preparation, etc. These methods can reduce the sensitivity of HNIW to a certain extent, but At the same time, the energy density of HNIW is also significantly reduced.
For example, HNIW can form energetic co-crystals with a variety of solvents or explosives, but due to the introduction of non-energetic components or components with lower energy, and the process of co-crystal formation with HNIW induces unit cell repacking, the crystals stack The density decreases, which in turn leads to a significant decrease in the detonation performance of the modified HNIW explosive

Method used

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  • Co-self-assembled explosive with dense unit cell accumulation structure and preparation method thereof
  • Co-self-assembled explosive with dense unit cell accumulation structure and preparation method thereof
  • Co-self-assembled explosive with dense unit cell accumulation structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040](1) Weigh 10g of paraformaldehyde raw material and place it in a 100ml flask, connect the flask to an Erlenmeyer flask containing 20ml of toluene through an adapter and a gas tube at the mouth of the bottle, and place the flask in an oil bath in a fume hood Heat to 80°C, stop heating until the toluene solvent has no gas bubbling, and obtain anhydrous formaldehyde solution with a concentration of about 2mol / L;

[0041] (2) Put 5g of HNIW raw material in a 250ml Erlenmeyer flask, measure 20ml of methyl formate and add it, stir it with a magnetic force at 500r / min until completely dissolved, and obtain an anhydrous HNIW solution with a concentration of about 0.25g / ml;

[0042] (3) Add the anhydrous formaldehyde solution obtained in step (1) into the HNIW solution, and fully mix with 500r / min magnetic stirring;

[0043] (4) Using the low-temperature anti-solvent crystallization method, place the crystallization solution in a cryostat at 5°C, slowly add 80ml of n-hexane dropw...

Embodiment 2

[0046] (1) Weigh 20g of paraformaldehyde raw material and place it in a 50ml flask, connect the flask to the Erlenmeyer flask containing 20ml of ether through an adapter and a gas tube at the mouth of the bottle, and place the flask in an oil bath in a fume hood Heat to 100°C, stop heating until the ether solvent has no gas bubbles, and obtain anhydrous formaldehyde solution with a concentration of about 2.5mol / L;

[0047] (2) Put 5g of HNIW raw material in a 250ml Erlenmeyer flask, measure 50ml of tetrahydrofuran, add it, and stir it magnetically at 800r / min until it is completely dissolved to obtain an anhydrous HNIW solution with a concentration of about 0.1g / ml;

[0048] (3) Take 5ml of the anhydrous formaldehyde solution obtained in step (1) and add it to the HNIW solution, and mix thoroughly with 800r / min magnetic stirring;

[0049] (4) Using the low-temperature anti-solvent crystallization method, place the crystallization solution in a cryostat at -30°C, slowly add 150...

Embodiment 3

[0052] (1) Weigh 10g of paraformaldehyde raw material and place it in a 100ml flask, connect the flask to the Erlenmeyer flask containing 120ml of chloroform through an adapter and a gas tube at the mouth of the bottle, and place the flask in an oil bath in a fume hood Heat to 120°C, stop heating until the chloroform solvent has no gas bubbles, and obtain anhydrous formaldehyde solution with a concentration of about 0.3mol / L;

[0053] (2) Put 5g of HNIW raw material in a 250ml Erlenmeyer flask, add 6.3ml of acetone, and stir magnetically at 100r / min until completely dissolved to obtain an anhydrous HNIW solution with a concentration of about 0.8g / ml;

[0054] (3) Take 7ml of the anhydrous formaldehyde solution obtained in step (1) and add it to the HNIW solution, and mix thoroughly with 100r / min magnetic stirring;

[0055] (4) Using the low-temperature anti-solvent crystallization method, place the crystallization solution in a cryostat at 10°C, slowly add 40ml of n-hexane dro...

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Abstract

The invention discloses a co-self-assembled explosive with a dense unit cell accumulation structure and a preparation method thereof. A fresh anhydrous formaldehyde-containing HNIW explosive solutionis prepared, a recrystallization technology is utilized for supersaturation, synergistic co-self-assembly of formaldehyde and HNIW is driven so as to form HNIW / HCHO co-self-assembled explosive crystals with a highly ordered accumulation structure and periodic arrangement. The molecular molar ratio of HNIW to formaldehyde molecules in the prepared co-self-assembled explosive is 2:1, and formaldehyde molecules are embedded in a unit cell cavity, so that the unit cell accumulation structure of the co-self-assembled explosive is very compact, the unit cell accumulation rate is as high as 84.01%, and the co-self-assembled explosive has good thermal stability and low sensitivity. Formaldehyde molecules are embedded to increase the unit cell accumulation dense rate and improve the reaction degree, released gas amount and safety performance of high-energy explosive, thus providing a new thought for high-energy explosive performance control.

Description

technical field [0001] The invention relates to high-energy explosive crystal construction technology, in particular to a co-self-assembled explosive with a dense unit cell packing structure and a preparation method thereof. Background technique [0002] Modern weapons put forward higher requirements for energetic materials such as "precise strike, high-efficiency damage, high survivability and environmental adaptability", which makes traditional energetic materials face severe challenges. In early 2017, metallic hydrogen and N 5 - The successful preparation of ions has drawn more attention to the subject of energetic materials. The pursuit of high-energy explosives with high energy, high safety, and excellent comprehensive performance has become a research hotspot in the field of energetic materials. Hexanitrohexaazaisowurtzitane (HNIW) is currently a single-substance explosive that can be prepared in large quantities, has the highest energy and relatively excellent compr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B45/00C06B25/34C06B21/00
CPCC06B21/00C06B25/34C06B45/00
Inventor 徐金江田勇孙杰李洁张浩斌
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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