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Method for preparing low-sensitivity copper azide by CNTs and copper nano-wires

A technology of copper nanowires and copper nitride, which is applied in the field of preparation of micro-nano energetic materials, can solve problems such as high sensitivity, and achieve the effects of improving reaction efficiency, simple reaction device and convenient operation.

Pending Publication Date: 2020-03-03
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, copper azide was once a strictly prohibited primer due to its extreme sensitivity

Method used

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  • Method for preparing low-sensitivity copper azide by CNTs and copper nano-wires
  • Method for preparing low-sensitivity copper azide by CNTs and copper nano-wires
  • Method for preparing low-sensitivity copper azide by CNTs and copper nano-wires

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Use a volumetric flask to prepare 200 mL of NaOH solution with a concentration of 15 mol / mL, add it to a 500 mL three-necked flask after cooling, and then add Cu(NO 3 ) 2Solution (10mL, 0.1mol / L), 1.5mL of EDA and hydrazine hydrate (0.25mL, 35wt%) solution, mixed thoroughly; then the three-necked flask was placed in a water bath, heated to 80 ° C, and the reaction time was 1h; After the reaction, the three-neck flask was taken out and cooled to room temperature; the product was centrifuged, washed and collected several times by centrifugation-redispersion with deionized water. Store the resulting copper nanowires in absolute ethanol for later use. Copper nanowires were formulated into 5 mg / mL absolute ethanol mother liquor, which was subjected to ultrasonic treatment for 30 minutes for later use, and single-walled carbon nanotubes were ultrasonically treated in SDS solution for 30 minutes to obtain a uniform dispersion with a solution concentration of 0.4 mg / mL; The a...

Embodiment 2

[0046] Use a volumetric flask to prepare 200 mL of NaOH solution with a concentration of 15 mol / mL, add it to a 500 mL three-necked flask after cooling, and then add Cu(NO 3 ) 2 solution (10mL, 0.1mol / L), 1.8mL of EDA and hydrazine hydrate (0.25mL, 35wt%) solution, mix thoroughly; then place the three-neck flask in a water bath, heat to 85°C, and the reaction time is 1.5h; After the reaction was finished, the three-neck flask was taken out and cooled to room temperature; the product was subjected to centrifugation, and washed and collected several times with deionized water by centrifugation-redispersion. Store the resulting copper nanowires in absolute ethanol for later use. Copper nanowires were formulated into 5 mg / mL absolute ethanol mother liquor, and ultrasonically treated for 20 minutes for later use. Single-walled carbon nanotubes were ultrasonically treated in SDS solution for 20 minutes to obtain a uniform dispersion with a solution concentration of 0.4 mg / mL; The ...

Embodiment 3

[0048] Use a volumetric flask to prepare 200 mL of NaOH solution with a concentration of 15 mol / mL, add it to a 500 mL three-necked flask after cooling, and then add Cu(NO 3 ) 2 solution (10mL, 0.1mol / L), 3.0mL of EDA and hydrazine hydrate (0.25mL, 35wt%) solution, mix thoroughly; then place the three-neck flask in a water bath, heat to 85°C, and the reaction time is 2.0h; After the reaction was finished, the three-neck flask was taken out and cooled to room temperature; the product was subjected to centrifugation, and washed and collected several times with deionized water by centrifugation-redispersion. Store the resulting copper nanowires in absolute ethanol for later use. Copper nanowires were formulated into 5 mg / mL absolute ethanol mother liquor, and ultrasonically treated for 20 minutes for later use. Single-walled carbon nanotubes were ultrasonically treated in SDS solution for 20 minutes to obtain a uniform dispersion with a solution concentration of 0.4 mg / mL; The ...

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Abstract

The invention discloses a method for preparing low-sensitivity copper azide by compounding carbon nano-tubes and copper nano-wires. The method comprises the following steps: preparing copper nano-wires by utilizing a liquid phase reduction method, mixing the copper nano-wires and single-walled carbon nano-tubes, depositing the prepared composite material on an electric-conducting substrate by utilizing an electrochemical deposition method, and preparing the copper azide / carbon nano-tube composite energetic material through a gas-solid phase azide reaction. According to the preparation method provided by the invention, the influence of external force on the reaction product can be effectively reduced so as to improve the safety and the reliability; sodium azide and stearic acid are used asthe reactants, the adopted device is simple, and the azidation efficiency is high; and the accumulation of electrostatic charges on the composite material is reduced through the carbon material, so that the electrostatic sensitivity of the copper azide is reduced while the excellent detonation performance of the copper azide is not affected.

Description

technical field [0001] The invention relates to the field of preparation of micro-nano energetic materials, in particular to a method for preparing low-sensitivity copper azide by compounding CNTs and copper nanowires. Background technique [0002] Copper azide is an extremely sensitive primer. The limit dose required to detonate Taian is 0.4mg, which is one-sixth of lead azide, which can greatly reduce the amount of charge and improve the safety of weapons. , reduce the input energy, and meet the needs of miniature pyrotechnics. In addition, copper ions are environmentally friendly materials. Compared with other heavy metal ions such as lead ions, they can reduce the generation of harmful substances and protect the environment. However, copper azide was once a strictly prohibited primer due to its extremely high sensitivity. Therefore, how to reduce the sensitivity of copper azide, and how to further optimize and improve the charge density, strength, sensitivity control, ...

Claims

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Application Information

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IPC IPC(8): C01B21/08C06B35/00C06B21/00
CPCC01B21/08C06B35/00C06B21/0008C01P2004/03C01P2004/04C01P2002/72C01P2004/80
Inventor 胡艳刘旭文李婷婷叶迎华沈瑞琪
Owner NANJING UNIV OF SCI & TECH
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