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Preparation method of super thermite with core-shell structure

A technology of super thermite and core-shell structure, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as inability to meet the effective contact between metal and oxidant molecular scale, difficult to meet application requirements, complex process equipment, etc., to avoid The mass transfer distance is too large to avoid uneven distribution and the effect of simple synthesis process

Inactive Publication Date: 2016-05-25
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the super thermite prepared by current preparation methods such as sol-gel method, ultrasonic dispersion and compounding method, reaction inhibition grinding method, etc. can only achieve uniform mixing or compounding of nano-aluminum powder and oxides, but cannot Meet the effective contact between metal and oxidant at the molecular scale
Although methods such as ALD (atomic layer deposition) can prepare super thermite materials with a complete core-shell structure, the process equipment is complicated, the technical requirements are high, and the output is small, which is difficult to meet the application requirements.

Method used

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  • Preparation method of super thermite with core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation of embodiment 1nAlDOPA-Cu

[0019] (1) Disperse 5g of nano-aluminum powder in 100mL of distilled water in an ice bath, add 2g of levodopa (DOPA), adjust the pH value in the range of 8.5 to 12 and stir for 1 to 2 hours; weigh 4.84g (0.02mol) Copper nitrate was dissolved in the above suspension, stirred and mixed evenly;

[0020] (2) stirring and reacting in ice bath for 4h, then standing;

[0021] (3) The precipitate was washed with deionized water several times and dried to obtain a dark gray product.

Embodiment 2

[0022] The preparation of embodiment 2nAlDOPA-Fe

[0023] (1) Weigh 5g of nano-aluminum powder, disperse it in 100mL of distilled water under ice bath conditions, add 2g of levodopa (DOPA), adjust the pH value in the range of 8.5-12 and disperse and stir for 1-2h; weigh 8.08g (0.02mol) ferric nitrate is dissolved in above-mentioned suspension liquid, stirs and mixes;

[0024] (2) stirring and reacting in ice bath for 3h, then standing;

[0025] (3) The precipitate was washed with deionized water several times and dried to obtain a dark gray product.

Embodiment 3

[0026] The preparation of embodiment 3nAlDOPA-Mg

[0027] (1) Weigh 5g of nano-aluminum powder, disperse it in 100mL of distilled water under ice bath conditions, add 2g of levodopa (DOPA), adjust the pH value in the range of 8.5-12 and disperse and stir for 1-2h; weigh 5.12g (0.02mol) magnesium nitrate is dissolved in above-mentioned suspension liquid, stirs and mixes;

[0028] (2) stirring and reacting in ice bath for 4h, then standing;

[0029] (3) The precipitate was washed with deionized water several times and dried to obtain a dark gray product.

[0030] Characterization and Performance Test of nAlDOPA-M Super Thermite

[0031] 1. Structural characterization

[0032] Taking the nAlDOPA-Cu sample as an example, figure 1 is a transmission electron micrograph of the sample. It can be clearly seen from the figure that the prepared sample is a complete core-shell structure. The particle size is about 100nm, and the thickness of the shell layer is about 10nm. Since no o...

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Abstract

The invention discloses a preparation method of super thermite with a core-shell structure. The preparation method comprises the following steps: (1) covering the surface of nano aluminum powder; (2) and preparing the super thermite nAl@DOPA-M. Compared with a traditional method, the super thermite prepared by the method disclosed by the invention avoids the problem that the distribution of an oxidant and the aluminum powder is not uniform; a complete shell layer is formed on the surface of nano aluminum through a biomolecule oxidant; and the conduction speed of reaction heat can be remarkably reduced, the mass transferring efficiency is improved and the energy releasing efficiency of materials is greatly improved. The method has the advantages of moderate reaction conditions, simple process, and convenience for preparation in batch, and popularization and application of the method are facilitated.

Description

technical field [0001] The present invention relates to a super thermite, which can be used as the main component of solid propellant or combustion catalyst. technical background [0002] In the field of modern national defense science and technology, energetic materials and their development and application in weapon equipment systems play a pivotal role, and are an important basis for weapons and ammunition to have high performance. The pursuit of high energy performance is the eternal goal of energetic materials; at the same time, in terms of energy release (kinetics) of energetic materials, it is necessary to explore and discover the essential characteristics of their efficacy / energy release process, and to understand and use these characteristics to Controlling the properties of energetic materials. [0003] NanoEnergetic materials (NanoEnergeticmaterials, nEMs) refer to energetic materials with a particle size of 1-100nm, which can be nanocrystals of simple energetic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30B22F1/02
CPCB22F9/30B22F1/102
Inventor 曲文刚赵凤起高红旭罗阳郝海霞姜菡雨
Owner XIAN MODERN CHEM RES INST
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