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Nano fluorine-aluminum high energy release fuel and preparation method thereof

A technology of nano-aluminum and fluorine-aluminum, which is applied in the field of high-energy-release fuel and its preparation, and can solve problems such as the thickness of the fluorine-containing shell and the impact on performance

Active Publication Date: 2019-01-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the existing fluorine-aluminum composite preparation method is more suitable for micron aluminum powder. The thickness of the fluorine-containing shell on the surface of the micron aluminum powder is about 100 nm. For nano-aluminum powder, the 100 nm fluorine-containing shell is too thick and heavy. , affecting its performance, thus providing a nano-aluminum fluoride high-energy release fuel and its preparation method

Method used

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  • Nano fluorine-aluminum high energy release fuel and preparation method thereof
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  • Nano fluorine-aluminum high energy release fuel and preparation method thereof

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specific Embodiment approach 1

[0037] Embodiment 1: The nano-aluminum fluoride high-energy-release fuel of this embodiment is composed of a nano-aluminum core and a shell layer from which the oxide film has been removed; the nano-aluminum core is treated with HF solution to obtain a nano-aluminum core from which the oxide film has been removed, and simultaneously generates Al 2 f 1.5 (OH) 1.5 0.375H 2 O aluminum source, then Al 2 f 1.5 (OH) 1.5 0.375H 2 The aluminum perfluorocarboxylate cross-linked network formed by the reaction of O aluminum source and perfluorocarboxylic acid acts as the shell layer.

[0038] The beneficial effects of this specific embodiment are: 1. This specific embodiment is a perfluorocarboxylate aluminum cross-linked network to establish a polymer-like coating layer and an active aluminum core to directly contact to form a nano-fluorine-aluminum composite structure. The specific reaction mechanism As follows: (1) HF solution etches the oxide layer on the surface of aluminum po...

specific Embodiment approach 2

[0041] Specific embodiment two: the preparation method of a kind of nano-aluminum fluoride high energy release fuel of the present embodiment is to carry out according to the following steps:

[0042] 1. Mix the HF solution with a mass percentage of 1% to 10% and the solvent to obtain a mixed solution;

[0043] The volume ratio of the 1%-10% HF solution to the solvent in the mass percentage is 1:(0.5-2);

[0044] 2. Add nano-aluminum powder to the mixed solution, and stir at room temperature for 3 minutes to 10 minutes to obtain a mixed solution containing aluminum powder;

[0045] The mass percentage described in step 1 is that the volume of the HF solution of 1%~10% and the mass ratio of nano-aluminum powder described in step 2 are 10mL:(1~3)g;

[0046] 3. Add a perfluorocarboxylic acid solution with a concentration of 5g / L to 20g / L to the mixed solution containing aluminum powder, and stir at room temperature for 2h to 8h to obtain a crude product;

[0047] The solvent in...

specific Embodiment approach 3

[0050] Embodiment 3: This embodiment is different from Embodiment 2 in that: the solvent described in step 1 is N,N-dimethylformamide, dimethylacetamide or dimethyl sulfoxide. Others are the same as in the second embodiment.

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Abstract

The invention relates to nano fluorine-aluminum high energy release fuel and a preparation method thereof and aims to solve the problem that existing preparation method of fluorine-aluminum compoundsare more applicable to micro aluminum powder, a fluorine-containing shell on the surface of the micro aluminum powder is about 100 nm thick, for nano aluminum powder, the fluorine-containing shell of100 nm is too heavy and affects the performance of the nano aluminum powder. The nano fluorine-aluminum high energy release fuel consists of a nano aluminum core with an oxidation film removed and a shell. The method comprises the steps as follows: 1, mixing an HF solution and a solvent to obtain a mixed solution; 2, adding nano aluminum powder to the mixed solution, and stirring the mixture at normal temperature to obtain a mixed solution containing aluminum powder; 3, adding a perfluorocarboxylic acid solution to the mixed solution containing aluminum powder, and performing stirring at normal temperature to obtain a crude product; 4, washing the crude product with absolute ethyl alcohol and performing filtration under reduced pressure to obtain the nano fluorine-aluminum high energy release fuel. The method is used for preparing the nano fluorine-aluminum high energy release fuel.

Description

technical field [0001] The invention relates to a high-energy-release fuel and a preparation method thereof. Background technique [0002] Solid propellant is an energy-containing composite material with specific properties. It is the power source of various solid engines such as missiles and satellites. With the development of the times and the improvement of space strategic goals, higher requirements are put forward for the performance of solid propellants. Require. As a new type of solid propellant additive, nano-aluminum powder greatly improves its burning rate and specific impulse, and there is no obvious agglomeration phenomenon in the combustion process. Therefore, nano-aluminum powder has gradually become a current research hotspot. Nano-aluminum powder has high surface activity and large specific surface area, so its storage and preparation are difficult. At present, the commonly used method for preparing nano-aluminum powder is the electric explosion method, that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B45/34C06B21/00
CPCC06B21/0083C06B45/34
Inventor 杨玉林郝冬宇林凯峰夏德斌范瑞清扈颖慧姜艾锋王平
Owner HARBIN INST OF TECH
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