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A kind of modified aluminum powder based on polydopamine interface regulation of nitramine explosive and preparation method

A nitramine explosive and interface control technology, applied in explosive processing equipment, explosives, offensive equipment, etc., can solve problems such as high viscosity, achieve the effect of increasing mass fraction, high density, and improving the preparation process

Active Publication Date: 2021-04-02
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes a modified aluminum powder based on polydopamine interface regulation nitramine explosives and its preparation method, to improve the energy and density of aluminum-containing explosives, and to solve the problem of propellant slurry due to the addition of aluminum powder. The problem of excessive viscosity caused by

Method used

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  • A kind of modified aluminum powder based on polydopamine interface regulation of nitramine explosive and preparation method
  • A kind of modified aluminum powder based on polydopamine interface regulation of nitramine explosive and preparation method
  • A kind of modified aluminum powder based on polydopamine interface regulation of nitramine explosive and preparation method

Examples

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Effect test

example 1

[0030] A method for preparing aluminum powder coated with nitroamine explosive based on polydopamine interface regulation, comprising the following process steps:

[0031] (1) Polydopamine coated on the surface of aluminum powder: Add 0.36g of dopamine and 0.2g of TRIS buffer solution (PH=8.5) into 200ml of distilled water, stir for 10min to partially polymerize the dopamine molecules, then add 3.6g of micron aluminum powder ( 1-2 μm) and stirred for 8 hours so that polydopamine grows in situ on the surface of the aluminum powder to form a polydopamine layer, and the solution is dried to obtain an aluminum powder whose surface is evenly coated with polydopamine.

[0032] (2) Mixing of aluminum powder and ammonium nitrate explosive: Weigh 0.4g of RDX and 0.4g of micron aluminum powder (particle size 1-2μm) coated with polydopamine on the surface, add to 10ml of dimethyl The sulfoxide solution was stirred with a magnetic stirrer at 70°C for 30 minutes until the ammonium nitrate ...

example 2

[0042] A method for preparing aluminum powder coated with nitroamine explosive based on polydopamine interface regulation, comprising the following process steps:

[0043] (1) Polydopamine coated on the surface of aluminum powder: same as Example 1.

[0044] (2) Mixing of aluminum powder and ammonium nitrate explosive: Weigh 0.6g of RDX and 0.3g of micron aluminum powder (particle size 1-2μm) coated with polydopamine on the surface, add to 12ml of dimethyl The sulfoxide solution was stirred with a magnetic stirrer at 70°C for 30 minutes until the ammonium nitrate was completely dissolved, and then ultrasonicated for 20 minutes with an ultrasonic cleaner.

[0045] (3) Precipitation of composite energetic crystals: Slowly and uniformly drop 25 ml of distilled water into the above solution to precipitate crystals.

[0046] (4) Collection of the product: the product was washed with distilled water, filtered, dried and collected in an oven, and the yield was calculated to be 90.0%...

example 3

[0053] A method for preparing aluminum powder coated with nitroamine explosive based on polydopamine interface regulation, comprising the following process steps:

[0054] (1) Polydopamine coated on the surface of aluminum powder: Same as Example 1, replace the micron aluminum powder with nano aluminum powder (average particle diameter 70nm) of the same quality.

[0055] (2) Mixing of aluminum powder and ammonium nitrate explosive: Weigh 0.4g of RDX and 0.4g of nano-aluminum powder (average particle size 70nm) coated with polydopamine on the surface, add to 10ml of dimethyl sulfoxide The solution was stirred with a magnetic stirrer at a temperature of 70°C for 30 minutes until the ammonium nitrate was completely dissolved, and then ultrasonicated for 20 minutes with an ultrasonic cleaner.

[0056] (3) Precipitation of composite energetic crystals: Slowly and uniformly drop 20 ml of distilled water into the above solution to precipitate crystals.

[0057] (4) Collection of the...

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Abstract

The invention relates to a polydopamine interface regulation-based nitramine explosive modified aluminum powder and a preparation method thereof. Micron-sized crystals containing an aluminum powder and a nitramine explosive are prepared by an anti-solvent process, uniform distribution and close contact of the aluminum powder and the nitramine explosive are achieved, and the crystals have the advantages of compact structure, high thermal stability and high density. The adoption of the polydopamine interface regulation-based nitramine explosive modified aluminum powder in an aluminum-containingexplosive reduces the content of an adhesive and additives in a formula, increases the mass fraction of the main explosive, and achieves the purpose of developing high-energy explosives. In addition,a part of the energetic material adopted to replace RDX, HMX, CL-20 and other nitramine explosives in traditional solid propellants improves the energy level of the propellants, improves the problem of too large viscosity of a propellant slurry, caused by the addition of nano-aluminum powder or high-aluminum powder, and optimizes the preparation technology of the propellants.

Description

technical field [0001] The invention belongs to the technical field of energetic materials, and relates to a modified aluminum powder based on polydopamine interface regulation and control of nitramine explosives and a preparation method. Background technique [0002] Energetic materials are the main source of energy for modern weapons, and higher energy levels and excellent combustion characteristics have always been the subject and direction of their development. As a common energetic material component, aluminum powder is often used in solid propellants to increase the density specific impulse and combustion temperature of the propellant, and the addition of aluminum powder to explosives can significantly improve the detonation heat, detonation temperature and workability of explosives ( Brousseau P, Anderson C J. Nanometric aluminum in explosives [J]. Propellants, Explosives, Pyrotechnics, 2002, 27(5): 300-306.). [0003] Composite solid propellant is a solid energetic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B45/30C06B45/12C06B33/04C06B21/00
Inventor 严启龙吕杰尧何伟刘佩进陶博文郭翔
Owner NORTHWESTERN POLYTECHNICAL UNIV
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