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A kind of preparation method of fluoropolymer/metal composite energetic material

A metal composite and fluoropolymer technology, which is applied in the direction of offensive equipment, explosives processing equipment, ammonium perchlorate composition, etc., can solve the problems of low pressure output, inability to react to release heat and pressure, and incomplete energy release, etc., to achieve The effect of simple operation process and easy batch preparation

Active Publication Date: 2021-01-26
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 these methods can improve the exothermic value of the reaction and the characteristics of the combustion reaction, they still cannot effectively solve the problems of low pressure output and incomplete energy release.
[0004] Pressure is an important factor affecting mass transfer during the material reaction process. However, the reaction product of fluoropolymer metal energetic materials is solid. For example, the boiling point of the reaction product is A1F3 is 1272 ° C, so the pressure output is difficult to be effectively solved.
On the other hand, the fluoropolymer metal energetic system reacts to produce a large amount of carbon. Carbon is the most important fuel for energetic materials. However, due to the lack of oxidant in the fluoropolymer metal system, it cannot react to release heat and pressure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]Add 5g of polytetrafluoroethylene (PTFE) powder to 50mL of 1% AP aqueous solution, stir and disperse, heat to 60-80℃ to volatilize the water, AP crystallizes out in water, doped on the surface of PTFE After drying and removing water at 60℃, AP-doped PTFE particles are obtained. The AP-doped PTFE prepared above and 1.5 g of aluminum powder were sequentially added to the F2311 binder solution, stirred and mixed, the solvent was volatilized, and dried at 60°C to obtain the AP-doped fluoropolymer metal energetic material.

Embodiment 2

[0026]Add 5g of polytetrafluoroethylene (PTFE) powder to 100mL of AP aqueous solution with a mass fraction of 5%, stir and disperse, heat to 70℃ to volatilize the water, AP crystallizes out in water, doped on the surface of PTFE, 60 After drying at ℃ to remove water, AP doped PTFE particles are obtained. The AP-doped PTFE prepared above and 3g of aluminum powder were sequentially added to the F2311 binder solution, stirred and mixed, the solvent was volatilized, and dried at 60°C to obtain the AP-doped fluoropolymer metal energetic material.

Embodiment 3

[0028]Add 5g of polytetrafluoroethylene (PTFE) powder to 100mL of AP aqueous solution with a mass fraction of 5%, stir and disperse, heat to 80°C to volatilize the water, AP crystallizes out in water, doped on the surface of PTFE, 60 After drying at ℃ to remove water, AP doped PTFE particles are obtained. The AP-doped PTFE prepared above and 3 g of boron powder were sequentially added to the F2311 binder solution, stirred and mixed, the solvent was volatilized, and dried at 60° C. to obtain the AP-doped fluoropolymer metal energetic material.

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Abstract

The invention discloses a preparation method of a fluoropolymer / metal composite energetic material. Ammonium perchlorate is doped into a fluoropolymer metal energetic system through a solution crystallization method to form a novel composite energetic material. The gas products generated by the decomposition of ammonium perchlorate are used to enhance the pressure output and combustion reaction performance of the system. At the same time, the gas generated by the decomposition of ammonium perchlorate reacts with the reaction product carbon of the fluoropolymer metal system to increase the release of energy and pressure. Thereby significantly increasing the energy and combustion reaction characteristics of the fluoropolymer metal energetic system. The invention effectively increases the energy and pressure output of the fluoropolymer metal energy-containing system, and the combustion reaction rate changes from slow combustion to deflagration and explosion. The new energetic system formed by doping is expected to be applied in the fields of solid propellants, metallized explosives and gas generators.

Description

Technical field[0001]The invention relates to the technical field of energetic materials, in particular to a preparation method of a fluoropolymer / metal composite energetic material.Background technique[0002]Energetic materials refer to compounds or mixtures that can independently carry out rapid chemical reactions and output energy. They are the damage and power source of weapon systems. Among them, the fluoropolymer / metal energetic system has been widely used in solid propellants, explosives and reactive fragments due to its ultra-high energy density and excellent reaction performance. Such as the energy of the polytetrafluoroethylene (PTFE) / A1 composite system is 21KJ / cm3, The energy density of polytetrafluoroethylene (PTFE) / Mg is 9.6KJ / g.[0003]Years of research and application have found that because the reaction of this type of material is an intermolecular reaction, the rate of energy release is controlled by physical processes such as heat and mass transfer. However, the mini...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B29/22C06B21/00
CPCC06B21/0016C06B29/22
Inventor 王军詹春红张龙
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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