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Insoluble energetic organic polymer-coated micro-nano particles and preparation method thereof

A micro-nano particle and polymer technology, applied in transportation and packaging, boron/boride, metal processing equipment, etc., can solve the problems of harsh operating conditions, reduce the overall energy of the formula, poor stability, etc., and achieve good dispersibility.

Active Publication Date: 2021-08-13
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In summary, the existing technology has the following three problems when coating the surface of micro-nanoparticles with a thin film: first, the operating conditions are harsh, and there are risks in the scale-up test; second, the surface coating is uneven; third, the reduction of the formula The overall energy, and polydopamine is actually an oligomer, which will slowly decompose after soaking in water, and the stability is poor

Method used

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  • Insoluble energetic organic polymer-coated micro-nano particles and preparation method thereof
  • Insoluble energetic organic polymer-coated micro-nano particles and preparation method thereof
  • Insoluble energetic organic polymer-coated micro-nano particles and preparation method thereof

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preparation example Construction

[0032] The preparation method of the insoluble energetic organic polymer coated micro-nano particles of the present invention comprises the following steps:

[0033] Step 1, first discuss in two cases: when the micro-nano particles are aluminum powder, add 30mL tetrahydrofuran into a 100mL three-neck flask, add 2g micro-nano aluminum powder; when the micro-nano particles are boron powder, add o-dichlorobenzene and dichlorobenzene Each 25ml of methyl acetamide is added into a 100mL three-necked flask, and 5g of micro-nano boron powder is added; micro-nano in the present invention refers to a particle size of 20 nanometers to 100 microns;

[0034] Use an ice-water bath to cool down the mixed system to 0-5°C, feed argon or nitrogen to prevent the aluminum powder from being oxidized, add the first monomer to the three-necked flask, the mass of the first monomer is 0.1% of the aluminum powder or boron powder ~20%, control the obtained system to 0~25℃;

[0035] The first monomer is...

Embodiment 1

[0044] Add 30ml of anhydrous tetrahydrofuran into a 100mL three-necked flask, add 2.0g of aluminum powder, cool down to 0°C in an ice-water bath, and inject nitrogen to prevent the aluminum powder from being oxidized. Add 184 mg of cyanuric chloride, and control the reaction solution to 20°C.

[0045] Under an ice-water bath environment at 0°C, dissolve 90 mg of ethylenediamine and 387.5 mg of acid-binding agent diisopropylamine in 5 ml of anhydrous tetrahydrofuran, and slowly drop them into the flask, which can dissolve faster than direct addition. React at 0°C for 1 hour under argon atmosphere, then gradually raise to reflux at 70°C, and react for 1 day.

[0046] The reaction solution was lowered to room temperature, and the product was obtained by suction filtration, rinsed with water, ethanol, and acetone successively, and dried in vacuum to obtain micro-nano aluminum particles coated with an insoluble energetic organic polymer.

[0047] From figure 1 It can be seen that...

Embodiment 2

[0049] Add 25ml each of o-dichlorobenzene and dimethylacetamide into a 100mL three-neck flask, add 5g of boron powder, cool down to 5°C in an ice-water bath, and blow in argon to prevent the boron powder from being oxidized. Add 0.42g trialdehyde phloroglucinol, and control the reaction solution to 25°C.

[0050] In an ice-water bath environment at 3°C, slowly add 0.498g of 3,3-diaminobioxadiazole, react at 5°C for 0.5h under an argon atmosphere, then gradually rise to 120°C and react for 1 day;

[0051] After the reaction liquid is cooled to room temperature, the product is obtained by suction filtration, rinsed with water, ethanol, and acetone successively, and vacuum-dried to obtain insoluble energetic organic polymer-coated micro-nano boron particles.

[0052] From Figure 5 A large number of granular micro-nano boron particles can be seen, and there are some sheet-like polymers, and a large number of large pores are evenly distributed in the sheet-shaped polymers, and th...

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Abstract

The insoluble energetic organic polymer-coated micro-nano particles and the preparation method thereof of the present invention include soaking the micro-nano aluminum powder or boron powder in a solvent at a low temperature, adding the first monomer at 0-25°C, and then adding the second Monomer, first react at 0-5°C for 0.5-2h in a protective gas atmosphere, and then react at 50-120°C to obtain a reaction liquid, the nucleophilic substitution reaction between the halogen and the second monomer, and the polycondensation between the aldehyde group and the second monomer reaction, the amino group and the second monomer undergo a catalytic coupling reaction, and the product in the reaction solution is separated and then dried to obtain insoluble energy-containing organic polymer-coated micro-nano particles. The energy-containing organic polymer-coated micro-nano particles are insoluble in water and organic solvents, avoiding the problems of slow decomposition after soaking and poor stability, and good dispersion, which solves the problem of easy oxidation and combustion on the surface of micro-nano aluminum and boron particles. The problem of the high temperature required for the reaction.

Description

technical field [0001] The invention relates to the technical field of energetic materials, in particular to insoluble energetic organic polymer-coated micro-nano particles and a preparation method thereof. Background technique [0002] As an energetic material, aluminum powder has the characteristics of high energy density and easy ignition. Micro-nano-sized aluminum powder has been widely used in some formulas, showing excellent properties. Boron powder is the preferred additive for high-energy boron-rich fuel-rich solid propellants because of its high mass calorific value and volume calorific value. However, aluminum powder and boron powder will be slowly oxidized by oxygen in the air to form a dense shell of aluminum oxide or boron oxide. When the oxide layer reaches a certain thickness, it will hinder its internal oxidation. However, the oxide layer does not contribute to energy during combustion, and it also makes it difficult to burn aluminum and boron in the inner l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B45/32C08G12/02B22F1/00C01B35/02
CPCC06B45/32C01B35/023C08G12/02B22F1/102
Inventor 郭兆琦程彦飞耶金杨娜王煜马海霞
Owner NORTHWEST UNIV
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