Preparation method of polymer-based composite energetic material-coated modified nano metal particles

A technology of nano metal particles and polymers, used in offensive equipment, explosives processing equipment, non-explosive/non-thermal agent components, etc., can solve problems such as poor practicability, and achieve easy oxidation, excellent mechanical properties, and good practicability. Effect

Inactive Publication Date: 2019-11-15
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for better dispersion of nanoparticles into liquid matrices without being affected from their chemical structure during processing steps like synthesis. It involves adding an ionizable substance called AIBN (ammonium peroxide) onto a special type of plastic resin made up mostly of polyvinyl chloride). By applying voltage between two parallel plate conductors placed close enough together under certain conditions, electrons flow through them causing it to break down molecules containing nitrogen atoms. These particles then become charged positively when exposed to strong electric fields within specific ranges of electrical potential difference across these terminals.

Problems solved by technology

This patented technical problem addressed in this patents relates to improves the properties of nanosheptium carbonyl ammonia complex composites made from neonium powders. These new compositions exhibit improved thermal stability compared to existing products while also having better control over their burning behavior than previous designs. Additionally, these novel composites may contain various substances like iron hydroxylaminoferrite, magnetically active ceramics, tantalum sponge, etc., making them easier to handle when mixed together without causing damage on sensitive areas within the composition.

Method used

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  • Preparation method of polymer-based composite energetic material-coated modified nano metal particles
  • Preparation method of polymer-based composite energetic material-coated modified nano metal particles
  • Preparation method of polymer-based composite energetic material-coated modified nano metal particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of polymer NC coated nano metal silicon powder particles comprises the following process steps:

[0031] Coating of nano-silica powder: 100mg NC was dried in an oven at 60°C for 1 hour to remove moisture. Afterwards, NC was dissolved in a mixed solvent of 12 ml acetone (AR) and 3 ml N,N-dimethylformamide (DMF) (volume ratio 4:1), and sonicated for 1 hour. 200 mg of nano-Si powder was added to the NC solution at a certain ratio (the mass ratio of NC and Si was 1:2), and magnetically stirred for 2 hours to obtain a NC / Si suspension.

[0032] Doping of the energetic oxidant AP: 200 mg of AP was ground in a mortar with acetone solvent for half an hour. At the same time, gently pour the ground AP into the NC / Si suspension in a certain ratio (the mass ratio of NC and AP is 1:2), and stir it magnetically for 2 hours to obtain the final precursor solution of NC / AP / Si .

[0033] Preparation of composite nanoparticles by electrostatic spraying method: put ...

Embodiment 2

[0038] Coating of nano silicon powder: 66.66mg NC was dried in an oven at 60°C for 1 hour to remove moisture. Afterwards, NC was dissolved in a mixed solvent of 8ml acetone (AR) and 2ml N,N-dimethylformamide (DMF) (AR:DMF=4:1), and sonicated for 1 hour. 300mg of nano-Si powder was added to the NC solution at a certain ratio (the mass ratio of NC and Si was 1:4.5), and magnetically stirred for 2 hours to obtain a NC / Si suspension.

[0039] Doping of the energetic oxidant AP: 133.34 mg AP was ground in a mortar with acetone solvent for half an hour. At the same time, gently pour the ground AP into the NC / Si suspension in a certain ratio (the mass ratio of NC and AP is 1:2), and stir it magnetically for 2 hours to obtain the final precursor solution of NC / AP / Si .

[0040] Preparation of composite nanoparticles by electrostatic spraying method: put the prepared NC / AP / Si precursor solution into a syringe (the inner diameter of the needle is 6.25mm), and the injection speed is 1.5...

Embodiment 3

[0045] Coating of nano silicon powder: 33.3mg NC was dried in an oven at 60°C for 1 hour to remove moisture. NC was dissolved in a mixed solvent of 4 ml acetone (AR) and 1 ml N,N-dimethylformamide (DMF) (volume ratio 4:1), and sonicated for 1 hour. 400 mg of nano-Si powder was added to the NC solution at a certain ratio (the mass ratio of NC and Si was 1:12), and magnetically stirred for 2 hours to obtain a NC / Si suspension.

[0046] Doping of the energetic oxidant AP: 66.7 mg AP was ground in a mortar with acetone solvent for half an hour. At the same time, gently pour the ground AP into the NC / Si suspension in a certain ratio (the mass ratio of NC and AP is 1:2), and stir it magnetically for 2 hours to obtain the final precursor solution of NC / AP / Si .

[0047] Preparation of composite nanoparticles by electrostatic spraying method: put the prepared NC / AP / Si precursor solution into a syringe (the inner diameter of the needle is 6.25mm), and the injection speed is 0.6mm min ...

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Abstract

The invention discloses a preparation method of polymer-based composite energetic material-coated modified nano metal particles, and the preparation method is used for solving the technical problem ofpoor practicability of the existing preparation method of coated nano metal powder. According to the technical scheme, nano metal powder is added into a precursor polymer solution by adopting an electrostatic spraying method, and then an energetic oxidant AP or CL-20 is embedded in the solution to form the composite micro-nano material with zero oxygen balance. The composite nano metal powder obtained by the electrostatic spraying method has uniform particle size distribution and high particle sphericity and is not agglomerated easily. The used polymer material is NC or polyvinylidene fluoride (PVDF), and the NC and PVDF are both high molecular polymers which have excellent mechanical property and are easily dissolved in organic solvents, so that the metal powder can be effectively and uniformly dispersed in the precursor solution. In addition, the energetic oxidant is added into the system, so that the technical problems that existing nano metal powder is oxidized easily, and energyand ignition performance of nano powder coated by a conventional method are low can be solved through the electrostatic spraying method, and practicability is good.

Description

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Claims

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Application Information

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Owner NORTHWESTERN POLYTECHNICAL UNIV
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