Preparation of hollow Mg/MnO2 super energetic materials

A hollow and maltose technology, applied in metal material coating process, electrolytic coating, vacuum evaporation coating and other directions, can solve the problems of difficult operation, complicated process, difficult realization of industrial application, etc., and achieves low cost, simple preparation, overcoming The effect of long mass transfer distance

Inactive Publication Date: 2019-05-03
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the preparation methods reported so far all have complex

Method used

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  • Preparation of hollow Mg/MnO2 super energetic materials
  • Preparation of hollow Mg/MnO2 super energetic materials
  • Preparation of hollow Mg/MnO2 super energetic materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Precisely configure 0.1mol / L manganese nitrate solution in a 100mL Erlenmeyer flask, add a small amount of maltose, wherein the molar ratio of manganese nitrate to maltose is 1:10 -2 , and then continue to stir until all the maltose is dissolved in the Erlenmeyer flask, and then transfer the mixture to a 100mL reaction kettle. The heating rate was 20°C / min, and the reaction temperature and reaction time were controlled at 200°C and 8h, respectively. After the reaction was completed, it was naturally cooled to room temperature. Then carry out repeated centrifugal drying, the rotation speed is controlled at 1000r / min, and then placed in a vacuum drying oven at 25°C for 8 hours. Accurately weigh 2 mg of the obtained powder and disperse it in a volume ratio of 1:2:10 -2 Add 100mL of the dispersion liquid of glycerol, acetylacetone and chlorosulfonated polyethylene, and place it in an ultrasonic instrument for ultrasonic dispersion treatment for 30min. Insert the positive...

Embodiment 2

[0033] Others are the same as in Example 1, the voltage drop of the electrophoretic assembly is half of that of Example 1, the assembly efficiency, that is, the deposited mass per unit time is approximately halved, but the energy output capacity is sharply reduced by nearly 40%. The corresponding DSC heat release curve fits that the heat release under this condition is about 3.2MJ Kg -1 . Furthermore, the measured adhesion ratings remained essentially unchanged.

Embodiment 3

[0035] Other is the same as embodiment 1, and difference is that the concentration of manganese nitrate is 0.05mol / L, and other conditions are constant, MnO 2 The pores of the microspheres disappeared, and the specific surface area of ​​the sample obtained under this condition was measured by a specific surface meter to be about 0.9m 2 / g, about 10% of the examples. Porous hollow Mg / MnO 2 The preparation of super thermites was not possible. Although an exothermic reaction can still occur, the corresponding exothermic heat at this time is about 30% of that of the example, which directly affects its synthesis efficiency and performance output.

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Abstract

The invention relates to preparation of hollow Mg/MnO2 super energetic materials. The preparation includes the steps that a hydrothermal synthesis method is used for obtaining novel MnO2 porous hollowmicrospheres, MnO2 thin films are obtained through electrophoretic deposition, a vacuum evaporation method is used for carrying out composite deposition of magnesium films, and finally the preparation and design of the hollow Mg/MnO2 super energetic materials are realized. According to the preparation, an energetic film with a novel structure is ingeniously designed; in addition, the heat releaseamount of the energetic film is found as high as 5.2 MJ/Kg through thermal analysis, initiation tests and the like, the combustion degree is severe, and the advantages are obvious; and in addition, the process is not limited by metal substrates, is suitable for complex structures, can be well combined with MEMS devices, and is conducive to the development of a new generation of energetic devices.

Description

technical field [0001] The invention relates to a preparation of micro-nano energetic materials, in particular to a porous hollow Mg / MnO 2 Preparation process of super energetic materials. Background technique [0002] Micro-nano energetic materials (EMs) are a new kind of mixture containing one or more micro-nano-level components, which have greatly improved performance compared with traditional materials. Studies have found that the components of this type of composite energetic material have certain surface effects, volume effects, and quantum size effects due to their small size, high activity, and large contact area. Once the external energy stimulus exceeds When the energy release threshold is reached, there will be a violent reaction between the components immediately, some accompanied by popping sounds, bright flames, white smoke, etc. Due to the different types of components, the ways of releasing energy are different, but the external energy required to induce ch...

Claims

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Application Information

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IPC IPC(8): C25D13/02C23C14/18C23C14/24
Inventor 黎学明郭晓刚王琪辉徐鹏李安琪王雅丽马侑才陶志倪婕
Owner CHONGQING UNIV
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