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Organic solvent coated nano boron particles as well as preparation method and application thereof

An organic solvent, nano-boron technology, applied in the method of granulating raw materials, coating particles, nano-technology, etc., can solve problems such as application limitations of boron-containing propellants

Pending Publication Date: 2022-03-01
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the preparation method of nano-boron powder is very mature, the practical application of boron-containing propellants is still limited. The main reason is that the high specific surface area and surface energy of nano-boron particles make nano-boron particles easier to be oxidized. Formation of oxide layers and other impurities

Method used

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  • Organic solvent coated nano boron particles as well as preparation method and application thereof
  • Organic solvent coated nano boron particles as well as preparation method and application thereof
  • Organic solvent coated nano boron particles as well as preparation method and application thereof

Examples

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[0026] The present invention also provides a method for preparing organic solvent-coated nano-boron particles described in the above technical solution, comprising the following steps:

[0027] Dispersing nano-boron powder in an alcohol-water mixed solvent to obtain a boron dispersion;

[0028] mixing the boron dispersion with an organic solvent to obtain organic solvent-coated boron nanoparticles;

[0029] Described organic solvent is ethylenediamine or gasoline.

[0030] Unless otherwise specified, the present invention has no special requirements on the sources of the raw materials used for the preparation, and commercially available products well known to those skilled in the art can be used.

[0031] The invention disperses the nanometer boron powder in the mixed solvent of alcohol and water to obtain the boron dispersion liquid.

[0032] In the present invention, the average particle size of the nano boron powder is preferably 200nm.

[0033] In the present invention,...

Embodiment 1

[0049] Weigh 0.2g of nano-boron powder (average particle size is 200nm) and add it into 100mL (92.80g) alcohol-water mixed solvent (the volume ratio of absolute ethanol and water is 1:1), and disperse at 25°C with an ultrasonic disperser 40min (dispersing power is 500W), obtain dispersion liquid;

[0050]Add 5 mL of ethylenediamine (4.50 g) dropwise to 25 mL of the above dispersion, stir magnetically at 25°C for 1 h at a stirring rate of 300 r / min, let stand for 50 min, and filter the resulting oil phase under reduced pressure. The obtained solid material was dried for 30 minutes under vacuum conditions of MPa and 70° C. to obtain organic solvent-coated boron nanoparticles.

Embodiment 2

[0052] The difference from Example 1 is that the consumption of ethylenediamine is 10mL, and the rest of the contents are consistent.

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Abstract

The invention belongs to the technical field of organic and inorganic composite nanoparticles, and particularly relates to an organic solvent coated nano boron particle as well as a preparation method and application thereof. The organic-solvent-coated nano boron particle provided by the invention has the organic coating layer coated on the surface of the nano boron particle, the organic coating layer is adsorbed on the surface of the nano boron particle through chemical adsorption and physical adsorption, the organic coating layer can effectively isolate oxygen in an external environment from entering the nano boron particle, the nano boron particle is prevented from being oxidized, and in addition, the organic-solvent-coated nano boron particle can be used for preparing the organic-solvent-coated nano boron particle. The compatibility between the organic coating layer coating the surfaces of the nano boron particles and the boron-containing propellant component is good, the ignition point of the organic coating layer is low, gas generated after combustion is beneficial to breaking a boron oxide layer, and the ignition and combustion performance of the boron particles is improved.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic composite nanoparticles, and in particular relates to an organic solvent-coated nano-boron particle and a preparation method and application thereof. Background technique [0002] In recent years, nanomaterials have unique properties different from bulk materials due to the size effect, making them have important applications in the field of energetic materials. Energetic materials can rapidly release a large amount of heat during combustion. However, traditional organic high-energy materials such as aluminum have limited energy density, which limits their applications. The mass energy density of boron is 59kJ / g, and the volume energy density is 138kJ / cm 3 , respectively 1.9 times and 1.66 times that of aluminum. In recent years, boron has been widely used in pyrotechnics, delayed ignition powder and propellant and other fields. [0003] Although the preparation method of nano-boron p...

Claims

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Application Information

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IPC IPC(8): C06D5/00B01J2/00B01J13/22B82Y30/00B82Y40/00
CPCC06D5/00B01J2/006B01J13/22B82Y30/00B82Y40/00
Inventor 刘平安宋乃孟隋蓬华丁涛
Owner HARBIN ENG UNIV
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