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Pearl shell-imitated interface structure reinforced PBX compound and preparation method thereof

An interface structure, imitation pearl technology, applied in the direction of aromatic nitration composition, nitration acyclic/alicyclic/heterocyclic amine explosive composition, offensive equipment, etc., can solve the complex preparation process and poor molecular mechanical properties of interface modification and other problems, to achieve the effect of simple process, easy scale-up preparation, and improved mechanical properties

Active Publication Date: 2022-03-25
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

Although the above method can improve the interfacial compatibility between the explosive crystal and the binder matrix to a certain extent, and improve the mechanical properties, there are also common problems such as complex preparation process and poor mechanical properties of the introduced interface modification molecules.

Method used

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  • Pearl shell-imitated interface structure reinforced PBX compound and preparation method thereof
  • Pearl shell-imitated interface structure reinforced PBX compound and preparation method thereof
  • Pearl shell-imitated interface structure reinforced PBX compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 95g of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB), 1600g of deionized water, and 1.92g of (hydroxymethyl)aminomethane (Tris) in a beaker, and stir at room temperature for 15min Then add 3.2g of dopamine, continue to stir and react at room temperature for 4 hours, filter, wash and dry to obtain PDA-coated explosive powder.

[0026] (2) Take by weighing 9 g of graphene aqueous solution with solid content of 5%, 5 g of cellulose solution with solid content of 1%, and 200 g of deionized water in a beaker, stir and disperse after 30 min and add the PDA bag obtained in step (1). After stirring and mixing the covered explosive powder for 2 hours, the temperature of the solution system was raised to 90°C by means of oil bath heating, and the water solvent was evaporated under continuous stirring. After a large amount of solvent volatilized (about 1 hour), the resulting mixture slurry was transferred to Thoroughly dry in an oven at 60°C to obtain explosive powder coat...

Embodiment 2

[0030] (1) Weigh 95g of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB), 1600g of deionized water, and 1.92g of (hydroxymethyl)aminomethane (Tris) in a beaker, and stir at room temperature for 15min Then add 4.8g of dopamine, continue stirring and reacting at room temperature for 2.5 hours, filter, wash and dry to obtain PDA-coated explosive powder.

[0031] (2) Take by weighing 9.5 g of graphene aqueous solution with a solid content of 5%, 2.5 g of cellulose solution with a solid content of 1%, and 200 g of deionized water in a beaker, stir and disperse for 30 min and then add the obtained in step (1). For PDA-coated explosive powder, continue to stir and mix for 2 hours, heat the solution system to 90°C by means of oil bath heating, and evaporate the water solvent under continuous stirring. After a large amount of solvent volatilizes (about 1 hour), the resulting mixture slurry Transfer to an oven at 60°C for thorough drying to obtain explosive powder coated with an imitation pe...

Embodiment 3

[0035] (1) Weigh 95g of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB), 1600g of deionized water, and 1.92g of (hydroxymethyl)aminomethane (Tris) in a beaker, and stir at room temperature for 15min Then add 3.2g of dopamine, continue to stir and react at room temperature for 4 hours, filter, wash and dry to obtain PDA-coated explosive powder.

[0036] (2) Take by weighing 7 g of graphene aqueous solution with a solid content of 5%, 15 g of cellulose solution with a solid content of 1%, and 200 g of deionized water in a beaker, stir and disperse for 30 min and then add the PDA package obtained in step (1). After stirring and mixing the covered explosive powder for 2 hours, the temperature of the solution system was raised to 90°C by means of oil bath heating, and the water solvent was evaporated under continuous stirring. After a large amount of solvent volatilized (about 1 hour), the resulting mixture slurry was transferred to Thoroughly dry in an oven at 60°C to obtain explosive...

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Abstract

The invention discloses an imitated pearl shell interface structure reinforced PBX compound and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out PDA coating on explosive crystal powder; the preparation method comprises the following steps: adding graphene slurry and water-soluble cellulose into deionized water according to a certain mass ratio, mixing and dispersing, adding PDA coated explosive powder into a solution, heating to evaporate most of a solvent after mixing, and drying to obtain explosive crystal powder coated with an imitated pearl shell structure layer; molding powder is prepared in a kneading granulation mode, drying and pressing are carried out, and the pearl shell imitating interface structure reinforced PBX compound can be obtained. The outstanding mechanical property advantages of the pearl shell-imitated structural layer are utilized to greatly improve the mechanical property of the PBX compound, the mechanical strength and toughness of the compound are remarkably improved, and meanwhile, the technological process is simple, large-scale preparation is easy, and good application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of composite energetic materials, in particular to a PBX compound imitating the interface structure of pearl oyster and a preparation method thereof. Background technique [0002] Polymer bonded explosives (Polymer Bonded Explosive, PBX) are usually composed of explosive crystals with a super high mass fraction (90-95wt%) and a small amount of polymer binder. PBX has the advantages of high energy, safety and easy processing, and has been widely used in military and civilian fields. However, due to the poor compatibility of the explosive crystals and the binder matrix, the interface region between the two becomes a mechanical weak point in the PBX composite, which is very difficult due to the stress concentration during the storage, transportation and use of the PBX. It is easy to induce cracking at the interface, which seriously threatens the safety and reliability of the weapon system. Therefore, it is ve...

Claims

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Application Information

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IPC IPC(8): C06B25/04C06B25/34C06B21/00
CPCC06B25/04C06B25/34C06B21/00C06B21/0041
Inventor 王鹏孟力孙银双何冠松李鑫戴宇
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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