Preparation method of core-shell type nano metallic silver and explosive compound

A nano-metal silver, core-shell technology is applied in the directions of explosive composite components, explosive processing equipment, explosives, etc., and can solve the problems of uneven dispersion of nano-metal and energetic materials.

Active Publication Date: 2019-07-30
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a core-shell type nano-metal silver and explosive compound for the problem of uneven dispersion of nano-metal and energetic material in the existing nano-metal and energetic compound

Method used

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  • Preparation method of core-shell type nano metallic silver and explosive compound
  • Preparation method of core-shell type nano metallic silver and explosive compound
  • Preparation method of core-shell type nano metallic silver and explosive compound

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing a core-shell type nano-metallic silver and explosive compound, comprising the steps of:

[0032] (1) Add 10 g of HMX explosive powder with an average particle size of 100 μm into 500 mL of dopamine-Tris aqueous solution (2 g / L, pH about 8.5), stir at 500 rpm for 0.5 hour, filter with suction, and wash with deionized water for 5 times, vacuum drying at 60°C for 8 hours;

[0033] (2) Prepare 20mL silver nitrate solution (concentration is 0.1mol / L), add ammonia water to adjust, make silver ammonia solution, add 0.02g polyvinylpyrrolidone (PVP) thereinto;

[0034] (3) Add the HMX explosive powder obtained in step (1) to the mixed suspension obtained in step (2) after ultrasonic dispersion of 25KHz in 20mL water for 1min;

[0035] (4) Add 2 g of formaldehyde solution with a mass concentration of 20% to the solution of step (3) while shaking well, put the mixed suspension in a 70°C water bath, shake the mixture after standing for 10min, filter with suc...

Embodiment 2

[0037] A method for preparing a core-shell type nano-metallic silver and explosive compound, comprising the steps of:

[0038] (1) Add 10 g of HMX explosive powder with an average particle size of 50 μm into 500 mL of dopamine-Tris aqueous solution (5 g / L, pH about 8.5), stir at 400 rpm for 0.5 hour, filter with suction, and wash with deionized water for 5 times, vacuum drying at 60°C for 8 hours;

[0039] (2) Prepare 20 mL of silver nitrate solution (concentration: 0.25 mol / L), add ammonia water to adjust, make silver ammonia solution, add 0.03 g of polyoxyethylene sorbitan monolaurate (Tween-20) to it;

[0040] (3) Add the HMX explosive powder obtained in step (1) to the mixed suspension obtained in step (2) after ultrasonically dispersing it at 25KHz in 10mL water for 2min;

[0041] (4) Add 4 g of formaldehyde solution with a mass concentration of 20% to the solution of step (3) while shaking well, put the mixed suspension in a water bath at 72°C, shake the mixture after s...

Embodiment 3

[0043] A method for preparing a core-shell type nano-metallic silver and explosive compound, comprising the steps of:

[0044] (1) Add 10g of CL-20 explosive powder with an average particle size of 70μm into 500mL of dopamine-Tris aqueous solution (2g / L, pH about 8.5), stir at 400rpm for 1 hour, filter with suction, and use deionized water Washing 5 times, vacuum drying at 60°C for 8 hours;

[0045] (2) Prepare 20 mL of silver nitrate solution (concentration: 0.5 mol / L), add ammonia water to adjust, make silver ammonia solution, add 0.02 g of alkylphenol polyoxyethylene ether (OP-10) to it;

[0046] (3) The CL-20 explosive powder obtained in step (1) was dispersed in 20mL water with 25KHz ultrasonic wave for 0.5min and then added to the mixed suspension obtained in step (2);

[0047] (4) Add 12 g of formaldehyde solution with a mass concentration of 20% to the solution of step (3) while shaking well, put the mixed suspension in a water bath at 75° C., shake the mixture after st...

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Abstract

The invention discloses a preparation method of a core-shell type nano metallic silver and explosive compound. The preparation method comprises the steps that 1, explosive powder is added into a dopamine-Tris water solution to be stirred, and suction filtration, washing with deionized water and vacuum drying are carried out; 2, a silver nitrate solution is prepared, ammonium hydroxide is added foradjustment, a silver ammonia solution is formed, and a surface active agent is added into the silver ammonia solution; 3, the explosive powder obtained in step 1 is ultrasonically dispersed in water,and then added into the mixed suspension liquid obtained in step 2; 4, a formaldehyde solution is added to the solution in step 3 while uniform shaking is carried out, and the mixed suspension liquidis placed in a water bath of a certain temperature, the mixture is shaken after standing for certain time, suction filtration and vacuum drying are carried out, and the core-shell type nano metallicsilver and explosive compound is obtained. According to the preparation method, the surface of the explosive powder is pre-coated with a polydopamine layer, silver is promoted to be evenly settled onthe surface of dopamine, it is ensured silver particles are all settled on the surface of an explosive and are not independently gathered, and the silver particles do not fall off after being covered.

Description

technical field [0001] The invention relates to a method for preparing explosives, in particular to a method for preparing a composite of core-shell nano-metal silver and explosives, and belongs to the field of energetic composite materials. Background technique [0002] High-energy energetic materials are an ongoing goal in the field of propellants and explosives. Adding catalytic materials such as metals and metal oxides to energetic composites is an effective means to improve the energy release of energetic materials. At present, there are various metals such as Al, Mg, B, W, Zr, Ni, Cu, Fe, Ag, Co, In, Pt and Pb 3 o 4 , CuO, Fe 2 o 3 and other metal oxides are used to improve the energy release of energetic materials (Progress in Energy and Combustion Science, 2016, 57, 75–136). For example, Ting An et al prepared Cu 2 O-Bi 2 o 3 / GO nanocatalyst, which was found to have a catalytic effect on RDX-CMDB propellants (Propellants Explos. Pyrotech. 2018, 43, 1087–1095...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/08C06B33/10C06B21/00
CPCC06B21/0008C06B33/08C06B33/10
Inventor 巩飞艳杨志剑潘丽萍黄川何冠松曾诚成
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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