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Preparation method of press-packed explosive molding powder

A technology for press-packing explosives and modeling powders. It is applied in explosives, non-explosive/non-thermal components, and offensive equipment. It can solve problems such as environmental hazards, operator health damage, and excessive volatile and harmful solvents, and achieve efficient dispersion. Effect

Active Publication Date: 2017-06-06
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem with these two methods is that a large amount of organic solvents are needed to dissolve the binder during the preparation of the molding powder, and a large amount of organic solvents volatilize when the explosives are bonded into granules, which not only causes harm to the health of the operators, but also harms the environment. cause harm
[0003] At present, in view of the problem of many volatile and harmful solvents, the industry has explored methods such as condensation to recover organic solvents, but the high recovery cost and low efficiency limit its practical application
However, there is no report on the preparation of press-packed explosive molding powder without organic solvents.

Method used

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  • Preparation method of press-packed explosive molding powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First, at 0°C, add 0.5g of poly-N-isopropylacrylamide with an average molecular weight of 100,000g / mol into a 100mL beaker, add 30mL of water to dissolve the poly-N-isopropylacrylamide, and then add 19.5g of poly-N-isopropylacrylamide into the beaker Hexanitrohexaazaisowurtzitane with a particle size of 500nm to 3um was stirred and dispersed into a uniform emulsion at a stirring rate of 300rpm, then the temperature was raised to 40°C, and the mixture was stirred at a stirring rate of 300rpm. Stir for 5 minutes, filter with suction, and dry in a vacuum oven at 60°C for 6 hours to obtain modeling powder particles. Such as figure 1 As shown, the prepared modeling powder particles are uniform, the particles between 10 mesh and 40 mesh account for 90%, and the bulk density of modeling powder is 0.9g / cm 3 .

Embodiment 2

[0034] At 20°C, add 1.0 g of poly-N-isopropylacrylamide with an average molecular weight of 50,000 g / mol into a 100-mL beaker, add 19 mL of water to dissolve the poly-N-isopropylacrylamide, and then add 19.0 g of poly-N-isopropylacrylamide into the beaker. Hexanitrohexaazaisowurtzitane with a diameter of 500nm to 3um, stirred and dispersed into a uniform emulsion at a stirring rate of 500rpm, raised the temperature to 55°C, and stirred for 5min at a stirring rate of 500rpm After suction filtration, bake in a vacuum oven at 60°C for 6 hours to obtain modeling powder particles. The modeling powder particles are uniform, 96% of the particles are between 10 mesh and 40 mesh, and the bulk density of modeling powder is 0.8g / cm 3 .

Embodiment 3

[0036] At 20°C, add 2.0 g of poly-N-isopropylacrylamide with an average molecular weight of 20,000 g / mol into a 100-mL beaker, add 18 mL of water to dissolve the poly-N-isopropylacrylamide, and then add 23.0 g of poly-N-isopropylacrylamide into the beaker. Hexanitrohexaazaisowurtzitane with a diameter of 500nm to 3μm was stirred and dispersed into a uniform emulsion at a stirring rate of 800rpm, and then the temperature was raised to 70°C, and stirred for 5min at a stirring rate of 500rpm After suction filtration, bake in a vacuum oven at 60°C for 6 hours to obtain modeling powder particles. The modeling powder particles are uniform, 90% of the particles are between 10 mesh and 40 mesh, and the bulk density of modeling powder is 0.8g / cm 3 .

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Abstract

The invention discloses a preparation method for pressed-explosive molding powder. In order to solve the problem of more volatile harmful solvents in preparation of the current pressed-explosive molding powder, a temperature-sensitive polymer is utilized as a temperature-sensitive bonding agent, an explosive modeling powder with uniform particles is prepared in a pure water phase on the basis of the phase transformation to the temperature, high-efficiency dispersion of micronano explosive is realized; when the temperature is below 32 DEG C, the explosive is dispersed in aqueous solution of the temperature-sensitive polymer, and when the temperature rises, the temperature-sensitive polymer becomes hydrophobic, and the explosive particles are induced to gather into particles. The preparation method is a new green preparation method for the explosive modeling powder and can provide technical support for application of the micronano explosive in high-energy explosive and relevant energy-containing complexes.

Description

technical field [0001] The invention relates to the field of energetic composite materials, in particular to a preparation method of press-packed explosive molding powder. Background technique [0002] Due to its high density and high energy, press-packed explosives are widely used in cutting-edge weapons and industrial detonation fields (Ou Yuxiang, Explosives, Beijing Institute of Technology Press, 2014). Press-packed explosives are formed by pressing molding powder under certain pressure, temperature and other conditions. The most commonly used method of preparing press-packed explosive molding powder is water suspension granulation method and kneading method (Sun Yebin, Hui Junming, Cao Xinmao, mixed explosives for military use, ordnance industry press, 1995) at present. Among them, the water suspension granulation method is to dissolve the binder in the organic solvent first, stir the explosive in water, and add the binder solution dropwise to the mixture of the explos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B23/00
Inventor 巩飞艳刘小兵吴鹏杨志剑杨光成
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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