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High polymer bonded explosive enhancing mechanical properties with nanoparticles and preparation method of high polymer bonded explosive

A nanoparticle and high polymer technology is applied in the directions of nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, nitroalkane compositions, aromatic nitration compositions, etc. The effect of high energy density, single component and simple molding process

Active Publication Date: 2015-05-27
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 explosive particles in PBX are generally between tens of microns and one hundred microns, and there will be large gaps between the particles during the preparation and molding process. Studies have shown that such gaps reduce the mechanical properties

Method used

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  • High polymer bonded explosive enhancing mechanical properties with nanoparticles and preparation method of high polymer bonded explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 10.0g of TATB with a particle size of 20-30μm, weigh 10.0g of nano-TATB with a particle size of 100nm, mix and add to the reaction kettle, add 5.0ml of distilled water, stir at 50°C for 20min; raise the temperature to 70°C, drop Add the ethyl acetate-butyl acetate solution of F2314 with a solute mass fraction of 4%, the mass ratio of the ethyl acetate-butyl acetate solution of F2314 to the explosive particle raw material is 1:1, and the dropping rate is 6.0 at the beginning of the dropping ml / min, add dropwise until a large number of small explosive particles appear, reduce the dropping rate to 2.0ml / min, lower the temperature to 20°C after the binder is completely added dropwise, stop stirring, wash with distilled water twice, and place in an oven at 55 The explosive composite particles were obtained by drying at ℃; finally, 6.0 g of explosive composite particles were weighed and pressed into powder columns, and the mechanical properties were tested, as shown in T...

Embodiment 2

[0025] Weigh 10.0g of HMX with a particle size of 10-50μm, weigh 6.0g of nano-HMX with a particle size of 600nm, mix and add to the reaction kettle, add 3.0ml of distilled water, stir at 55°C for 30min; raise the temperature to 60°C, drop Add the ethyl acetate-butyl acetate solution of F2311 with a solute mass fraction of 4%, the mass ratio of the ethyl acetate-butyl acetate solution of F2311 to the explosive particle raw material is 1:1, and the initial dropping rate is 7.0ml / Min, add dropwise until a large amount of small explosive particles appear, reduce the drop rate to 3.0ml / min, after the dropwise addition, lower the temperature to 20°C, stop stirring, wash with distilled water for 3 times, then dry in an oven at 50°C to obtain explosive composite particles ; Finally, 4.0g of explosive composite particles were weighed and pressed into powder columns, and the mechanical properties were tested, as shown in Table 1.

Embodiment 3

[0027] Weigh 8.0g of HNS with a particle size of 5-30μm, weigh 3.0g of nano-HNS with a particle size of 400nm, mix and add to the reaction kettle, add 6.0ml of distilled water, stir at 50°C for 30min; raise the temperature to 60°C, drop Add the ethyl acetate-butyl acetate solution of F2311 with a solute mass fraction of 4%, the mass ratio of the ethyl acetate-butyl acetate solution of F2311 to the explosive particle raw material is 1:1, and the initial dropping rate is 7.0ml / min. Add dropwise until a large number of small explosive particles appear, reduce the dropping rate to 3.0ml / min, lower the temperature to 20°C after the dropwise addition, stop stirring, wash with distilled water for 3 times, and dry in an oven at 50°C to obtain explosive composite particles; finally Weigh 5.5g of explosive composite particles and press them into powder columns, and test the mechanical properties, as shown in Table 1.

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Abstract

The invention discloses a high polymer bonded explosive enhancing mechanical properties with nanoparticle and a preparation method of the high polymer bonded explosive. The high polymer bonded explosive contains 2-75% by mass of nano explosive particles with the particle size of 50-600nm. The preparation method comprises the following steps: mixing an explosive with an average particle size with the nano explosive particles in water in a proportion; then slowly adding a bonding agent solution to ensure that the explosive particles are gradually compounded into microparticles along with the volatilization of a solvent under the action of the bonding agent; and pressing an explosive product after washing and drying. According to the preparation method disclosed by the invention, the nano explosive particles are adopted to replace average granular explosive in the high polymer bonded explosive, and the PBX formula components and contents thereof are not needed to be changed, so that the mechanical properties of the high polymer bonded explosive can be significantly improved, a large amount of multi-component bonding agent systems which are used for improving the mechanical properties can be effectively avoided, the high-energy density of the high polymer bonded explosive is ensured, and meanwhile, the high polymer bonded explosive is relatively single in component, simple in preparation method and low in cost.

Description

technical field [0001] Embodiments of the present invention relate to the field of energetic materials, and more specifically, embodiments of the present invention relate to a polymer-bonded explosive whose mechanical properties are enhanced by nanoparticles and a preparation method thereof. Background technique [0002] Polymer bonded explosives or plastic bonded explosives (PBX) are mainly composed of explosive crystals and binder systems, and as the energy basis of weapons and ammunition, they play a decisive role in upgrading. Especially with the complexity and diversification of the modern war environment, higher requirements are put forward for PBX. While meeting the high energy density, better mechanical properties are required to resist bumps and vibrations during transportation, vibration shock and overload requirements during weapon launch, as well as thermal shock and thermal stress caused by environmental temperature changes during storage release etc. Realizin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/04C06B25/34C06B25/36
Inventor 王军谯志强杨光成潘丽萍
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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