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Method for designing and controlling microstructure of explosive based on supramolecular assembly and disassembly

A supramolecular and microstructure technology, applied in the direction of nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, etc., can solve the energy reduction of main energetic materials, reduce the purity and yield (low yield) of main energetic materials. and other problems to achieve the effect of improving performance, improving detonation performance and combustion performance

Active Publication Date: 2013-01-30
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

However, there are currently several problems in the supramolecular assembly of energetic materials. First, the preparation of explosive eutectics is difficult and the yield (yield) is low; second, new substances are introduced during the preparation process, which reduces the The purity of the main energetic material reduces the energy of the main energetic material; third, the supramolecular system formed by weak interaction force assembly is unstable, easy to decompose, and has a low density and limited detonation ability
Based on the above reasons, it is not realistic enough to fully expect supramolecular assembly to achieve a substantial improvement in the comprehensive performance of energetic materials.

Method used

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  • Method for designing and controlling microstructure of explosive based on supramolecular assembly and disassembly
  • Method for designing and controlling microstructure of explosive based on supramolecular assembly and disassembly
  • Method for designing and controlling microstructure of explosive based on supramolecular assembly and disassembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 5g of HNIW, dissolve it in a three-neck flask of 40g of dimethyl sulfoxide (DMSO), and dissolve it completely in a water bath at 75°C under stirring. After stabilizing for 30 minutes, turn on the program temperature control to cool down and recrystallize in the water bath , and continued to stir for 4 h after cooling down to room temperature until the crystals were completely precipitated.

[0032] (2) The crystals precipitated in step (1) were suction-filtered in a vacuum circulation pump, and washed with a low-polarity solvent (such as ether) to obtain a supramolecular co-crystal substance of HNIW and DMSO.

[0033] (3) Put the supramolecular co-crystal material obtained in step (2) in a vacuum drying oven, turn on the vacuum pump to pump air, and disassemble at 100°C. After 4 hours of disassembly, the disassembled HNIW crystal microcrystal clusters were obtained.

[0034] (4) Analyze the structure and appearance of the HNIW microcrystal clusters obtained in...

Embodiment 2

[0037] (1) Weigh 10g of RDX, dissolve it in a three-necked flask of 50g of hexamethylphosphoric triamide (HMPA), and dissolve it completely in a water bath at 75°C under stirring. After the dissolution is complete, it is stable for 30 minutes and then the program control is started. temperature, cooling the water bath for recrystallization, and continued stirring for 4 h after cooling down to room temperature until the crystals were completely precipitated.

[0038] (2) The crystals precipitated in step (1) are suction-filtered in a vacuum circulation pump, and washed with the filtered solvent mother liquor to obtain a supramolecular co-crystal substance of RDX and HMPA.

[0039] (3) Place the supramolecular co-crystal substance obtained in step (2) in a crystallization dish, spread it evenly, freeze it in the freezer of the refrigerator, and take it out when it is frozen until needed.

[0040] (4) Place the sample frozen in step (3) in a freeze dryer, turn on the vacuum pump ...

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Abstract

The invention discloses a method for designing and controlling the microstructure of an explosive based on supramolecular assembly and disassembly. The method comprises the following steps of: forming an energetic supramolecular cocrystal system through supramolecular self-assembly with energetic materials as host molecules and guest molecules; disassembling the guest molecules in the supramolecular cocrystal system under the action of an external force to obtain an energetic material with a special microstructure; and completing the design and control of the explosive microstructure. The method provided by the invention can design the microstructure of the energetic material from a molecular level, thereby realizing the controllable molecular transport and operation of the energetic material supramolecular system. The control of the inter-molecule action force from a micro level has influence on the change of a larger microstructure. The detonation performance and combustion performance of the obtained energetic material with the special microstructure are improved.

Description

technical field [0001] The invention relates to a method for designing the microstructure of energetic materials, in particular to a technology for designing and regulating the microstructure of explosive crystal materials based on supramolecular assembly-disassembly mode. Background technique [0002] Supramolecular chemistry provides a new idea for the design of energetic materials. In order to improve the comprehensive performance of existing energetic materials, many researchers have proposed the use of supramolecular assembly to design energetic materials. At the molecular level On the basis of the use of intermolecular forces to assemble and form new energetic material structures, for example, hexanitrohexaazaisowurtzitane (HNIW) and TNT (TNT) are formed by weak intermolecular interactions (mainly hydrogen bonds) Eutectic, thereby increasing the detonation energy of TNT, improving the safety performance of HNIW in order to improve the comprehensive performance of the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/34
Inventor 黄辉刘渝康彬徐瑞娟孙杰张浩斌徐金江刘晓峰
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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