Method for preparing graphene nano-composite energetic material through atomic-layer deposition technology

A technique of atomic layer deposition and nanocomposite, applied in the direction of nanotechnology, metal material coating process, coating, etc., can solve the problem of inability to control the affinity and spatial arrangement of metal fuel and oxidant, lack of effective distribution and load density Control and other issues, to achieve the effect of easy realization and promotion, improved spatial arrangement and affinity, and complete combustion reaction

Active Publication Date: 2016-08-10
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above methods can effectively control the size, distribution and loading density of nanometer metal or oxide particles loaded on the surface of graphene.
At the same time, the above methods cannot control the affinity and spatial arrangement of metal fuels and oxidants.

Method used

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  • Method for preparing graphene nano-composite energetic material through atomic-layer deposition technology
  • Method for preparing graphene nano-composite energetic material through atomic-layer deposition technology
  • Method for preparing graphene nano-composite energetic material through atomic-layer deposition technology

Examples

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Embodiment 1

[0039] This embodiment provides a method for preparing a graphene-loaded nano-aluminum powder composite energetic material by atomic layer deposition technology, and the method specifically includes the following steps:

[0040] Step 1: Preparation of graphene-supported nano-aluminum powder

[0041] (1) Add 0.1 g of graphene oxide and 100 g of N,N-dimethylformamide into an ultrasonic reactor, and obtain graphite oxide at an ultrasonic power of 1000 W, a frequency of 200 Hz, a temperature of 60 ° C, and an ultrasonic dispersion time of 2 hours. Alkene suspension.

[0042] (2) Prepare N,N-dimethylformamide (100g) and isopropanol (100g) as a co-solvent, add 2g of nano-aluminum powder into the co-solvent, and disperse with the aid of ultrasound. The ultrasonic power is 1000W and the frequency is 200Hz. The temperature was 60° C., and the ultrasonic dispersion time was 2 hours to obtain a stable dispersed nano-aluminum powder suspension. Add 100 g of graphene oxide suspension to ...

Embodiment 2

[0057] This example provides a method for preparing a graphene-loaded nano-aluminum powder composite energetic material by atomic layer deposition technology. Step 1 of the method is the same as Step 1 in Example 1, except for Step 2.

[0058] Step 2: Preparation of graphene nanocomposite energetic materials by atomic layer deposition

[0059] The graphene-supported nano-aluminum powder is placed in the reaction chamber of the vapor phase atomic layer deposition system, and the reaction chamber is sealed. Nitrogen gas was introduced into the vapor deposition system and vacuumed, the pressure was controlled at 133Pa, and the temperature was controlled at 200°C.

[0060] Atomic layer deposition is performed on graphene-supported nano-aluminum powder to form a coating film. A cycle of atomic layer deposition growth includes the following four steps:

[0061] (1) Inject tris(2,2,6,6-tetramethyl-3,5-heptanedionate bismuth) Bi(thd) into the reaction chamber 3 , so that it will und...

Embodiment 3

[0069] This example provides a method for preparing a graphene-loaded nano-aluminum powder composite energetic material by atomic layer deposition technology. Step 1 of the method is the same as Step 1 in Example 1, except for Step 2.

[0070] Step 2: Preparation of graphene nanocomposite energetic materials by atomic layer deposition

[0071] The graphene-supported nano-aluminum powder is placed in the reaction chamber of the vapor phase atomic layer deposition system, and the reaction chamber is sealed. Nitrogen was introduced into the vapor deposition system and vacuumed, the pressure was controlled at 133 Pa, and the temperature was controlled at room temperature.

[0072] A cycle of atomic layer deposition of graphene-supported nano-aluminum powder includes the following four steps:

[0073] (1) Inject the first precursor tin tetrachloride (SnCl 4 ) to make it complex with graphene-loaded nano-aluminum powder

[0074] A saturated surface chemical reaction occurs on the...

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Abstract

The invention discloses a method for preparing a graphene nano-composite energetic material through an atomic-layer deposition technology. The method includes the steps that graphene loaded nanometer metal compound powder is prepared through an ultrasonic-assisted solution mixing and in-situ reduction method, so that even scattering of nanometer metal on the surface of graphene is achieved; and then, the gas-phase atomic-layer deposition technology is adopted, two different precursors pass through a reaction cavity alternately, the precursors make contact with the surface of the graphene/nanometer metal compound powder fully, a chemical reaction is set off, and oxides are generated. By means of the method, the oxides wrap the graphene surface and the nanometer metal surface evenly. According to the graphene nano-composite energetic material prepared through the method, the affinity between the oxides and the nanometer metal surface is increased, and spatial arrangement is improved. Due to the addition of the graphene, the scattering situation of the nanometer metal is improved, and the energy release rate of the energetic material is increased. The method is high in automation degree and good in safety, the material can be directly used without after-treatment, and mass production of the graphene nano-composite energetic material is achieved easily.

Description

technical field [0001] The invention relates to a method for preparing a graphene nanocomposite energetic material, belonging to the technical field of nanomaterial preparation. Background technique [0002] The addition of nanometer metal powder to the propellant can improve the combustion performance of the propellant and significantly increase its energy level. The affinity and spatial arrangement between nanometer metals and oxidizers, catalysts, and energetic components of propellants have a significant impact on the combustion performance and combustion kinetics of propellants. The larger the contact area between the nano-metal particles and the oxidant and other components, the more complete the combustion reaction and the higher the energy level of the propellant. However, the extremely high specific surface area of ​​nano-metal powder usually leads to powder agglomeration and reduces the reactivity, which restricts its further application in the field of propellant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/455C23C16/40B82Y40/00
CPCB82Y40/00C23C16/40C23C16/4417C23C16/45525
Inventor 闫宁冯昊秦利军龚婷惠龙飞李建国黄钰张王乐
Owner XIAN MODERN CHEM RES INST
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