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Micron/nano aluminum powder composite particle coated with fluorine-containing polymer and preparation method thereof

A nano-aluminum powder and composite particle technology, which is used in offensive equipment, non-explosive/non-thermal agent components, and compressed gas generation, etc. Conditional acquisition, good density, and performance-enhancing effects

Inactive Publication Date: 2019-06-04
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Previously, researchers mostly used chemical deposition process or high-energy ball milling process to deposit inorganic fluoride and organic fluoride on the surface of aluminum powder, but the above-mentioned process has the disadvantage of weak interface adhesion. During the mixing process of propellant slurry, Partial detachment and damage of the cladding layer may occur, and have unpredictable effects on the stability of the propellant combustion performance

Method used

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  • Micron/nano aluminum powder composite particle coated with fluorine-containing polymer and preparation method thereof
  • Micron/nano aluminum powder composite particle coated with fluorine-containing polymer and preparation method thereof
  • Micron/nano aluminum powder composite particle coated with fluorine-containing polymer and preparation method thereof

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preparation example Construction

[0035] The fluorine-containing polymer-coated micro / nano-aluminum powder composite particle of the present invention is micron or nano-aluminum powder coated with polyfluorinated alkyl acrylate, and the coating thickness is 50 nm to 2 μm. The specific preparation method includes the following steps:

[0036] Step (1), according to the mass ratio, under the protection of nitrogen or inert gas, add micron or nanometer aluminum powder (10-100 parts), polyethylene Pyrrolidone (1-10 parts), low-carbon chain unsaturated fatty acid (0.05-1.5 parts), alcohol solvent (100-2000 parts), ultrasonic dispersion to uniformly disperse the aluminum powder in the alcohol solvent.

[0037] D of the above-mentioned nano-aluminum powder 50 Between 1 and 200nm, the D of micron aluminum powder 50 Between 1 and 50 μm.

[0038] The inert gas mentioned above is high-purity argon, high-purity helium and the like.

[0039]The above-mentioned low carbon chain unsaturated fatty acids used as functional ...

Embodiment 1

[0051] Under the protection of inert gas argon, add 10g FLQT-3 aluminum powder, 1.0g polyvinylpyrrolidone, 0.5g acrylic acid, 200ml n-butanol solvent into a 2L three-neck flask equipped with a reflux condenser and a constant pressure dropping funnel, and ultrasonically disperse Aluminum powder is uniformly dispersed in n-butanol solvent. Heat the above reaction solution to 65°C under vigorous stirring; slowly add the toluene solution (0.5g AIBN+10g toluene solvent) into the above reaction solution from a constant pressure dropping funnel, and react at 65°C for 30 minutes under vigorous stirring.

[0052] After 30 minutes, under the protection of inert gas argon, acetone solution (2g hexafluorobutyl acrylate + 50g acetone solvent) was added dropwise to the above reaction solution for 1.0 hour, and then heated to 70°C for aging 6.0 hours of reaction.

[0053] After the reaction is finished, cool to room temperature, use a centrifuge to separate the solid and liquid from the abo...

Embodiment 2

[0057] Under the protection of inert gas argon, add 10g FLQT-5 aluminum powder, 1.0g polyvinylpyrrolidone, 1.0g methacrylic acid, 300ml ethanol solvent into a 2L three-neck flask equipped with a reflux condenser and a constant pressure dropping funnel, and ultrasonically disperse Aluminum powder is uniformly dispersed in alcohol solvent. Heat the above reaction solution to 70°C under vigorous stirring; slowly add the toluene solution (0.5g ABVN+20g toluene solvent) into the above reaction solution from a constant pressure dropping funnel, and react at 70°C for 30 minutes under vigorous stirring.

[0058] After 30 minutes, under the protection of the inert gas argon, a butanone solution (2g hexafluorobutyl acrylate+2g dodecafluoroheptyl acrylate+50g butanone solvent) was added dropwise to the above reaction solution, and the dropping time was 1.5 hours, and then the temperature was raised to 75° C. and aged for 6.0 hours.

[0059] After the reaction, cool to room temperature, ...

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Abstract

The invention relates to a micron / nano aluminum powder composite particle coated with a fluorine-containing polymer and a preparation method thereof. According to the preparation method, firstly, a free radical emulsion polymerization method is adopted to polymerize a layer of the fluorine-containing polymer on the surface of micron / nano aluminum powder in an in-situ mode, so that the fluorine-containing polymer effectively coats the surface of the micron / nano aluminum powder; the activity of the micron aluminum powder or the nano aluminum powder can be effectively protected, the micron aluminum powder or the nano aluminum powder can be prevented from being violently oxidized in the using process, and the high-temperature oxidation rate and the heat release rate of the micron aluminum powder or the nano aluminum powder can be obviously improved; and meanwhile, the dispersity of the micron aluminum powder or the nano aluminum powder can be improved, the problem that the micron / nano aluminum powder is prone to agglomerate and difficult to disperse in the using process is solved, coating is uniform, the density is good, and the coating layer is not prone to falling off.

Description

technical field [0001] The invention relates to a fluorine-containing polymer-coated micron or nanometer aluminum powder composite particle and a preparation method thereof. The composite powder can be used as a modified double base propellant (CMDB) and a nitrate plasticized polyether propellant (NEPE) The invention relates to high-efficiency metal fuel, which belongs to the technical field of micron or nanometer material preparation and solid propellant. Background technique [0002] Nano-aluminum powder refers to the ultra-fine powder between the atomic cluster and the bulk phase with a particle size of 1-200nm. Due to the small size effect and surface interface effect of nano-aluminum powder, the bonding state and electronic state on the surface of the particle are different from those inside the particle, and the incomplete coordination of surface atoms, the active sites on the surface of the nano-aluminum powder increase and have a very high chemical reaction. Activit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C06B23/00C06B45/32C06D5/06C08F120/22
Inventor 田维平周水平任全彬唐根吴芳宋会彬汪越庞爱民王艳萍胡翔徐星星
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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