A kind of preparation method of hmx explosive with snow flake structure

Abstract

The invention discloses a preparation method for an HMX explosive with a snowflake-shaped structure and belongs to the technical field of energetic materials. The preparation method comprises the following steps: 1) adding HMX crystal into a first organic solvent under room temperature, and then fully dissolving HMX crystal in the manner of mechanical stirring, thereby acquiring a clear transparent HMX solution; 2) using an injector for sucking the HMX solution acquired in step 1), injecting to a second organic solvent under a stirring condition, keeping stirring for a period of time, and thenfiltering, washing with deionized water and drying, thereby acquiring the HMX explosive with the snowflake-shaped structure. The HMX explosive prepared according to the invention has a unique fractalstructure and has an important significance in national defense fields, such as technologies of initiation and explosion-propagation sequence of weapon charging, miniature initiation instruments andinitiating explosive devices. The preparation method disclosed by the invention has the advantages of simple process, short period, mild reaction conditions, easiness in amplification, low cost, and the like, and has an excellent application prospect.

Description

technical field

[0001] The invention belongs to the technical field of energetic materials, and in particular relates to a preparation method of HMX explosive with a snow flake structure. Background technique

[0002] 1,3,5,7-Tetranitro-tetraazacyclooctane (Octojin, HMX) is currently the best high-energy elemental explosive with high energy density and excellent physical and chemical properties. High-efficiency damage warheads, high-energy propellants, engineering blasting and other fields have broad application prospects. In order to further broaden the application range of HMX explosives in the field of energetic materials, explosive crystals with multi-level structures (such as snowflake flake structures) can be prepared. This structure can satisfy the high energy output of explosives, and at the same time make the detonation and safety performance of HMX more excellent, which is of great significance in the field of national defense such as the detonation and transmissi...

Examples

Embodiment 1

[0027] At room temperature, weigh 2.5g of HMX crystals, add them to 47.5g of N,N-dimethylformamide, completely dissolve the HMX crystals by mechanical stirring, and obtain a clear and transparent HMX solution with a mass concentration of 5%. . Use a syringe with a pore size of 0.4mm to draw 20g of the dissolved HMX solution, and inject it into 40g of absolute ethanol under the stirring condition of 200r / min, and the injection speed is 1mL / s. After maintaining stirring for 2 minutes, the material was filtered, washed with deionized water, and dried to obtain HMX explosive with a snow flake structure. figure 1 with figure 2 Respectively according to the 200 times and 1000 times scanning electron microscope pictures of the HMX explosive of the snow flake structure obtained according to the present embodiment, image 3 An optical microscope picture. The particle size of the explosive sheet is about 100 μm, the thickness is about 2 μm, and the product purity is 99.3%.

Embodiment 2

[0029] At room temperature, 2.5 g of HMX crystals were weighed, added to 22.5 g of γ-butyrolactone, and the HMX crystals were completely dissolved by mechanical stirring to obtain a clear and transparent HMX solution with a mass concentration of 10%. Use a syringe with a pore size of 1.2mm to draw 20g of the dissolved HMX solution, and inject it into 20g of methanol under the condition of 300r / min, and the injection speed is 2mL / s. After maintaining stirring for 5 minutes, the material was filtered, washed with deionized water, and dried to obtain HMX explosive with a snow flake structure. Figure 4 It is the 1000 times scanning electron microscope picture of the HMX explosive of the snow flake structure obtained according to the present embodiment, Figure 5 An optical microscope picture. The particle size of the explosive sheet is about 120 μm, the thickness is about 1.5 μm, and the product purity is 99.5%.

Embodiment 3

[0031] At room temperature, 2.5 g of HMX crystals were weighed, added to 247.5 g of dimethyl sulfoxide, and the HMX crystals were completely dissolved by mechanical stirring to obtain a clear and transparent HMX solution with a mass concentration of 1%. Use a syringe with a pore size of 1.0mm to draw 20g of the dissolved HMX solution, and inject it into 400g of isopropanol under the condition of 300r / min, and the injection speed is 5mL / s. After maintaining stirring for 15 minutes, the material was filtered, washed with deionized water, and dried to obtain HMX explosive with a snow flake structure. The particle size of the explosive sheet is about 150 μm, the thickness is about 2 μm, and the product purity is 99.2%.

technical field

[0001] The invention belongs to the technical field of energetic materials, and in particular relates to a preparation method of HMX explosive with a snow flake structure. Background technique

[0002] 1,3,5,7-Tetranitro-tetraazacyclooctane (Octojin, HMX) is currently the best high-energy elemental explosive with high energy density and excellent physical and chemical properties. High-efficiency damage warheads, high-energy propellants, engineering blasting and other fields have broad application prospects. In order to further broaden the application range of HMX explosives in the field of energetic materials, explosive crystals with multi-level structures (such as snowflake flake structures) can be prepared. This structure can satisfy the high energy output of explosives, and at the same time make the detonation and safety performance of HMX more excellent, which is of great significance in the field of national defense such as the detonation and transmissi...

Examples

Embodiment 1

[0027] At room temperature, weigh 2.5g of HMX crystals, add them to 47.5g of N,N-dimethylformamide, completely dissolve the HMX crystals by mechanical stirring, and obtain a clear and transparent HMX solution with a mass concentration of 5%. . Use a syringe with a pore size of 0.4mm to draw 20g of the dissolved HMX solution, and inject it into 40g of absolute ethanol under the stirring condition of 200r / min, and the injection speed is 1mL / s. After maintaining stirring for 2 minutes, the material was filtered, washed with deionized water, and dried to obtain HMX explosive with a snow flake structure. figure 1 with figure 2 Respectively according to the 200 times and 1000 times scanning electron microscope pictures of the HMX explosive of the snow flake structure obtained according to the present embodiment, image 3 An optical microscope picture. The particle size of the explosive sheet is about 100 μm, the thickness is about 2 μm, and the product purity is 99.3%.

Embodiment 2

[0029] At room temperature, 2.5 g of HMX crystals were weighed, added to 22.5 g of γ-butyrolactone, and the HMX crystals were completely dissolved by mechanical stirring to obtain a clear and transparent HMX solution with a mass concentration of 10%. Use a syringe with a pore size of 1.2mm to draw 20g of the dissolved HMX solution, and inject it into 20g of methanol under the condition of 300r / min, and the injection speed is 2mL / s. After maintaining stirring for 5 minutes, the material was filtered, washed with deionized water, and dried to obtain HMX explosive with a snow flake structure. Figure 4 It is the 1000 times scanning electron microscope picture of the HMX explosive of the snow flake structure obtained according to the present embodiment, Figure 5 An optical microscope picture. The particle size of the explosive sheet is about 120 μm, the thickness is about 1.5 μm, and the product purity is 99.5%.

Embodiment 3

[0031] At room temperature, 2.5 g of HMX crystals were weighed, added to 247.5 g of dimethyl sulfoxide, and the HMX crystals were completely dissolved by mechanical stirring to obtain a clear and transparent HMX solution with a mass concentration of 1%. Use a syringe with a pore size of 1.0mm to draw 20g of the dissolved HMX solution, and inject it into 400g of isopropanol under the condition of 300r / min, and the injection speed is 5mL / s. After maintaining stirring for 15 minutes, the material was filtered, washed with deionized water, and dried to obtain HMX explosive with a snow flake structure. The particle size of the explosive sheet is about 150 μm, the thickness is about 2 μm, and the product purity is 99.2%.

Images