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Nano-aluminum powder/paraffin energy-containing composite particle and preparation method and application thereof

A technology of composite particles and nano-aluminum powder, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of not being able to control the particle size of aluminum powder, affecting the coating effect of the coating agent, Complex process and other issues, to achieve the effect of low cost, improved activity, and simple preparation process

Inactive Publication Date: 2017-10-24
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Re-coating the prepared nano-aluminum powder, on the one hand, during the sampling process before coating, the surface of the nano-aluminum powder will inevitably be oxidized, which will affect the coating effect of the coating agent; on the other hand Even if it is operated in an anhydrous and oxygen-free environment, there will be defects such as complex process and high energy consumption
Chinese patents CN103182505A and CN102717068B adopt a two-step method. First, the nano-aluminum powder is prepared by a liquid-phase chemical method, and then the solvent-anti-solvent method is used to in-situ coat the nano-aluminum powder with propellant components RDX and HTPB. The aluminum powder is not oxidized before coating, and its activity can be effectively maintained by using the propellant components RDX and HTPB, but the patent does not describe the storage stability, and the process adopts distribution coating, and the introduction of the coating agent does not Can control the particle size of aluminum powder

Method used

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  • Nano-aluminum powder/paraffin energy-containing composite particle and preparation method and application thereof
  • Nano-aluminum powder/paraffin energy-containing composite particle and preparation method and application thereof
  • Nano-aluminum powder/paraffin energy-containing composite particle and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A method for synthesizing nano aluminum powder / paraffin energetic composite particles, comprising the following steps:

[0046] (1) Preparation of precursor solution: at room temperature (20°C), 0.01mol anhydrous AlCl 3 Dispersed into 20mL of toluene solution, 0.04mol of N((CH 3 ) 2 C 2 h 5 ) was added to AlCl at a rate of 1-2 drops / second 3 in the toluene solution. With N((CH 3 ) 2 C 2 h 5 ), solid AlCl 3 Dissolve gradually. To be AlCl 3 Dissolve completely, slowly add 0.06molLiAlH 4 Add it into the above system, continue to stir and react for 4 hours, centrifuge at a speed of 5000-8000 rpm, and take 5-15 minutes to obtain AlH 3 ·N((CH 3 ) 2 C 2 h 5 ) serum.

[0047] (2) Preparation of nano-aluminum powder / paraffin energetic composite particles: AlH 3 ·N(C 2 h 5 ) 3 Put the supernatant liquid and 40mL, 0.01g / mL paraffin toluene solution together into a three-necked flask with a constant pressure funnel at the top, pass through the system with argo...

Embodiment 2

[0060] A method for synthesizing nano aluminum powder / paraffin energetic composite particles, comprising the following steps:

[0061] (1) Preparation of precursor solution: at 30°C, 0.01mol anhydrous AlCl 3 Dispersed into 20mL of xylene solution, 0.04mol of N(CH 3 ) 3 Add to AlCl at a rate of 1-2 drops / sec 3 in the toluene solution. With N(CH 3 ) 3 The addition of solid AlCl 3 Dissolve gradually. To be AlCl 3 Dissolve completely, slowly add 0.03molLiAlH 4 Add it into the above system, continue to stir and react for 4 hours, centrifuge at a speed of 5000-8000 rpm, and take 5-15 minutes to obtain AlH 3 ·N(CH 3 ) 3 Serum.

[0062] (2) Preparation of nano-aluminum powder / paraffin energetic composite particles: AlH 3 ·N(CH 3 ) 3 Put the supernatant liquid into a three-necked flask with a constant pressure funnel at the top, pass through the system with argon for three to five cycles to evacuate, maintain the argon atmosphere, heat the above solution to 80°C with sti...

Embodiment 3

[0064] A method for synthesizing nano aluminum powder / paraffin energetic composite particles, comprising the following steps:

[0065] (1) Preparation of precursor solution: at room temperature (20°C), 0.01mol anhydrous AlCl 3 Dispersed into 20mL of toluene solution, 0.04mol of N(C 2 h 5 ) 3 Add to AlCl at a rate of 1-2 drops / sec 3 in the toluene solution. With N(C 2 h 5 ) 3 The addition of solid AlCl 3 Dissolve gradually. To be AlCl 3 Dissolve completely, slowly add 0.04molLiAlH 4 Add it into the above system, continue to stir and react for 4 hours, centrifuge at a speed of 5000-8000 rpm, and take 5-15 minutes to obtain AlH 3 ·N(C 2 h 5 ) 3 Serum.

[0066] (2) Preparation of nano-aluminum powder / paraffin energetic composite particles: AlH 3 ·N((CH 3 ) 2 C 2 h 5 ) supernatant into a three-necked flask with a constant pressure funnel at the top, and the system was pumped with argon for three to five cycles to maintain the argon atmosphere, and the above solu...

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Abstract

The invention discloses a nano-aluminum powder / paraffin energy-containing composite particle, a preparation method and application of the nano-aluminum powder / paraffin energy-containing composite particle as a solid propellant. According to the energy-containing composite particle, in-situ coating is directly performed on nano-aluminum with paraffin, a dense paraffin layer is formed on the surface of the nano-aluminum, and finally the formed spherical or approximately-spherical particle is the energy-containing composite particle. The nano-aluminum powder / paraffin energy-containing composite particle and the preparation method and application thereof have the advantages that the prepared energy-containing composite particle is adjustable in particle size, high in activated aluminum content and good in stability and can be served as an incendiary agent to be widely applied to the propellant.

Description

technical field [0001] The invention relates to a nanometer energetic composite particle for a solid propellant and a preparation method thereof, in particular to a solid propellant nano aluminum powder / paraffin wax energetic composite particle and a preparation method thereof, belonging to the field of energetic materials. Background technique [0002] Aluminum powder has the advantages of high density, low oxygen consumption, high combustion enthalpy and low cost, and is the most widely used metal combustion agent in propellants. Studies have shown that nano-processing of aluminum powder is an important method to improve the activity of aluminum powder and improve the comprehensive performance of propellants. On the one hand, when the particle size of the aluminum powder is reduced to the nanometer level, due to its high specific surface area and specific surface energy, it shows high reactivity, and can release high energy during the combustion process, making the propuls...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/16C06B23/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C06B23/005B22F9/16B22F1/16
Inventor 马振叶韩晓峰张利雄李星辉陆婷婷
Owner NANJING NORMAL UNIVERSITY
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