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Fluorine-containing polymer coated high-purity boron powder and preparation method thereof

A high-purity boron powder, polymer technology, applied in offensive equipment, explosive compound components, explosive processing equipment, etc., can solve the problems of failing to achieve industrial application, achieve strong engineering achievability, improve combustion efficiency, economical high value-added effects

Inactive Publication Date: 2021-05-28
江苏智仁景行新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods have more or less improved the combustion efficiency of amorphous boron powder, considering the process performance and combustion performance, they have not met the technical requirements for industrial applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a high-purity boron powder coated with vinylidene fluoride and hexafluoropropylene copolymer derivatives and a preparation method thereof.

[0027] The self-made high-purity boron powder is selected, the average particle size is 1 μm, and the boron content is 95%. The coating agent is commercially available copolymer of vinylidene fluoride and hexafluoropropylene.

[0028] Coating process: a certain amount of vinylidene fluoride and hexafluoropropylene copolymer was dissolved in 1000 mL of ethyl acetate (Table 1), and the fluoropolymer was heated in the solvent at 40 °C under stirring conditions for 1 hour until it contained The fluoropolymer is completely dissolved, and the fluoropolymer coating solution is prepared. Then, it was transferred to a glass container with a mechanical stirring device, 400 g of high-purity boron powder was poured into it, and the reaction was stirred for 3 h. The suspension was then poured into a rotary evaporator a...

Embodiment 2

[0034] This embodiment provides a high-purity boron powder coated with a terpolymer derivative of vinylidene fluoride / chlorotrifluoroethylene / hexafluoropropylene and a preparation method thereof.

[0035] The self-made high-purity boron powder is selected, the average particle size is 1 μm, and the boron content is 95%. The coating agent is a commercially available terpolymer of vinylidene fluoride / chlorotrifluoroethylene / hexafluoropropylene containing carboxyl groups.

[0036] Coating process: Dissolve a certain amount of terpolymer of vinylidene fluoride / chlorotrifluoroethylene / hexafluoropropylene in 2000mL of acetone (Table 2). Heat for 1 hour until the fluoropolymer is completely dissolved, and prepare a fluoropolymer coating solution. Then, it was transferred to a glass container with a mechanical stirring device, 600 g of high-purity boron powder was poured into it, and the reaction was stirred for 2 h. The suspension was then poured into a rotary evaporator and heated ...

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Abstract

The invention discloses fluorine-containing polymer coated high-purity boron powder. The fluorine-containing polymer is used for coating the high-purity boron powder, not only can the free energy of the specific surface of boron powder particles be reduced and the agglomeration phenomenon be reduced, but also the combustion efficiency of the boron powder can be remarkably improved. The invention further provides a preparation method of the fluorine-containing polymer coated high-purity boron powder. The fluorine-containing polymer coated high-purity boron powder obtained by the method can well solve the problems that the combustion efficiency of amorphous boron powder in a solid propellant is low, and the heat value of the boron powder cannot be effectively exerted. The coating preparation technology is simple, the engineering implementability of the coating process is high, and the economic added value is high.

Description

technical field [0001] The invention belongs to the field of energetic materials, in particular to a high-purity boron powder coated with fluoropolymer for solid propellants and a preparation method thereof. Background technique [0002] Boron powder is an energetic material with a high calorific value of combustion and is widely used in solid propellants and explosives. Boron powder generates low-melting boron oxide (B 2 o 3 ), while the amorphous boron powder has a higher melting point and is not easy to melt and vaporize, resulting in a lower combustion efficiency and a higher combustion calorific value that cannot be effectively brought into play. [0003] In order to improve the combustion efficiency of boron powder, a lot of technical research has been carried out at home and abroad. Domestically, technologies such as compounding, granulation and coating have been adopted to solve the technology of boron powder combustion efficiency. At present, boron powder coatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B21/00C06B23/00C06B45/32C06D5/06
CPCC06B21/0008C06B23/007C06B45/32C06D5/06
Inventor 王贵宗翟一鸣
Owner 江苏智仁景行新材料研究院有限公司
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