Method for preparing low-sensitivity copper azide by compounding rGO 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 improved reaction efficiency, simple reaction device, and convenient operation

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

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

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Experimental program
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Effect test

Embodiment 1

[0041] Prepare 300mL of 15mol / mL NaOH solution, 30mL of 0.1mol / mL Cu(NO 3 ) 2 Solution, ultrasonically disperse graphene oxide in 15 mL of water with a concentration of 5 mg / mL. Put Cu(NO 3 ) 2 The solution was added to the graphene oxide aqueous solution, magnetically stirred for 30 minutes, the solution changed from light blue to light brown; 15mL of EDA was added and stirred for 15 minutes, until the solution turned purple; the mixed solution was added to the NaOH (300mL, 15mol / mL) ) In a three-necked flask, continue to stir for 10 min, the solution gradually turns blue; place in a water bath, heat to 80 ℃, the reaction time is 1h. 0.6g of catechin hydrate was added to the reaction solution, and ultrasonicated for 10 minutes, the solution changed from blue to dark gray; heated in a water bath at 80°C for 1 hour. Centrifuge the product, repeat washing and collection several times; then repeat washing with absolute ethanol, and store the obtained reduced graphene oxide-modifie...

Embodiment 2

[0044] Prepare 300mL of 20mol / mL NaOH solution, 30mL of 0.1mol / mL Cu(NO 3 ) 2 Solution, ultrasonically disperse graphene oxide in 20 mL of water with a concentration of 6 mg / mL. Put Cu(NO 3 ) 2 The solution was added to the graphene oxide aqueous solution, magnetically stirred for 30 minutes, the solution changed from light blue to light brown; 15mL of EDA was added and stirred for 15 minutes, until the solution turned purple; the mixed solution was added to the NaOH (300mL, 15mol / mL) ) In a three-necked flask, continue to stir for 10 minutes, the solution gradually turns blue; place in a water bath, heat to 80 ℃, the reaction time is 1.5h. 0.6g of catechin hydrate was added to the reaction solution, and ultrasonicated for 10 minutes, the solution changed from blue to dark gray; heated in a water bath at 80°C for 1 hour. Centrifuge the product, repeat washing and collection several times; then repeat washing with absolute ethanol, and store the obtained reduced graphene oxide-m...

Embodiment 3

[0046] Prepare 300mL of 20mol / mL NaOH solution, 30mL of 0.1mol / mL Cu(NO 3 ) 2 Solution, ultrasonically disperse graphene oxide in 20 mL of water with a concentration of 10 mg / mL. Put Cu(NO 3 ) 2 The solution was added to the graphene oxide aqueous solution, and the solution was changed from light blue to light brown by magnetic stirring for 35 minutes; 15mL of EDA was added and stirred for 20 minutes until the solution turned purple; the mixed solution was added to the solution containing NaOH (300mL, 15mol / mL ) In a three-necked flask, continue to stir for 10 minutes, the solution gradually turns blue; placed in a water bath, heated to 80 ℃, the reaction time is 2h. 0.6g of catechin hydrate was added to the reaction solution, ultrasonicated for 10 minutes, the solution changed from blue to dark gray; heated in a water bath at 80°C for 1.5 hours. Centrifuge the product, repeat washing and collection several times; then repeat washing with absolute ethanol, and store the obtaine...

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Abstract

The invention discloses a method for preparing low-sensitivity copper azide by compounding rGO and copper nano-wires. The method comprises the following steps: preparing copper nano-wires by using a liquid phase reduction method, adding graphene oxide in the copper nano-wire synthesis process, preparing an electrophoretic solution from the prepared copper nano-wire / reduced graphene oxide compositematerial by using catechuic acid as a reducing agent through a hydrothermal method, carrying out an electrophoretic deposition experiment by using graphite as an anode and using a silicon wafer as acathode to deposit the surface of the silicon wafer, and carrying out azidation to prepare the low-sensitivity copper azide prepared from the composite rGO and the copper nano-wires. According to theinvention, with the preparation method, 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 nitric acidare used as the 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 rGO and copper nanowires. Background technique [0002] Copper azide is an extremely sensitive initiating charge. The limit charge required to detonate Taian is 0.4mg, which is one-sixth of lead azide. It can greatly reduce the charge and improve the safety of weapons. , To reduce the input energy and meet the demand for micro and small fireworks. In addition, copper ions are environmentally friendly materials. Compared with other heavy metal ions such as lead ions, copper ions can reduce the generation of harmful substances and protect the environment. However, due to its extremely high sensitivity, copper azide used to be a strictly prohibited explosive. Therefore, how to reduce the sensitivity of copper azide, and to further optimize and improve the charge density, strength, sensitivity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/08C06B35/00
CPCC01B21/08C06B35/00Y02P20/54
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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