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High-performance copper azide composite primer and preparation method thereof

A technology of copper nitride and primary explosives, which is applied in the cross field of nanochemistry and energetic materials, can solve the problems of poor ignition ability and electrostatic sensitivity, achieve low electrostatic sensitivity, improve oxygen balance, and enhance ignition performance.

Active Publication Date: 2021-09-21
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the electrostatic sensitivity and poor ignition ability of the current copper azide primer, the present invention provides a high-performance CA composite primer prepared based on copper-sulfur cluster-based assembly materials, and studies its performance in micro-initiators. application

Method used

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  • High-performance copper azide composite primer and preparation method thereof
  • High-performance copper azide composite primer and preparation method thereof
  • High-performance copper azide composite primer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Synthesis of heteroatom-doped copper azide material (CA-HPCH)

[0024] The specific steps are:

[0025] Step 1: 0.031g (0.2mmol) copper tert-butylsulfide ( t BuSCu) was placed in 3mL of chloroform, stirred rapidly; then added 0.03mL (0.4mmol) trifluoroacetic acid (CF 3 COOH), stirred until the solution was clear; added 0.02g (0.13mmol) 4,4'-bipyridyl (bpy) in 3mL methanol solution, and continued to stir for 5 minutes. After the reaction, the solution was slowly volatilized in the dark at room temperature, and orange cubic crystals were obtained after about 24 hours, which were recorded as copper-sulfur cluster-based assembly materials (Cu 12 bpy).

[0026] Step 2: the Cu obtained in the above steps 12 Fully grind bpy, spread it evenly in a high-temperature resistant quartz boat, place it in a tube furnace, and heat it at 5°C min -1 The temperature was raised to 400°C at a constant temperature for 1 hour under air atmosphere. After the tubular electric f...

Embodiment 2

[0032] Example 2: Performance test of copper azide-heteroatom co-doped porous carbon material (CA-HPCH) used as primer

[0033] Electrostatic sensitivity of CA-HPCH (E 50 ) Test: The electrostatic sensitivity of CA-HPCH was tested with an electrostatic spark sensitivity tester. Its calculation formula is E=0.5CU 2 , where C is the capacitance of the capacitor in Farads (F), and U is the charging voltage in Volts (V). E of CA-HPCH 50 The value is 1.1 mJ, much higher than that of pure CA powder (0.05 mJ), and comparable to the reported modified CA composites.

[0034] Flame Sensitivity of CA-HPCH (H 50 ) test: about 20mg of CA-HPCH was pressed onto the copper cap under a pressure of 39.2MPa, and ignited with black powder. h 50 Refers to the flame height from the black powder to the sample. H of CA-HPCH 50Value ≥ 60cm, reached the limit of detection conditions. This value is superior to CA (44 cm) and surpasses many previously reported primers, such as LS, graphene-modif...

Embodiment 3

[0035] Example 3: Performance test of a micro-initiator made of copper azide-heteroatom co-doped porous carbon material (CA-HPCH): The micro-initiator device includes a semiconductor bridge, a charging chamber and a photodiode. The current passed through the semiconductor bridge and increased to 2A at t = 2.5 μs, and the optical signal rose sharply at t = 7.0 μs, which indicated that the CA-HPCH ignited and exploded instantaneously. CA-HPCH corresponds to an input energy as low as 0.106mJ. This fast response time and low ignition energy demonstrate the excellent ignition performance of CA-HPCH in microinitiators.

[0036] Get the copper-sulfur cluster-based assembly material (Cu 12 bpy) for further characterization, the process is as follows:

[0037] (1) Determination of crystal structure

[0038] The X-ray single crystal diffraction data of the polymer of the present invention is measured on a Rigaku XtaLABPro target single crystal instrument with a single crystal sample ...

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Abstract

The invention discloses a high-performance copper azide composite priming charge and a preparation method thereof, belonging to the intersection fields of nanometer chemistry and energetic materials. First, a novel copper-sulfur cluster-based porous coordination polymer (referred to as Cu 12 bpy), the chemical formula of this compound is [Cu 12 (S t Bu) 9 (CF 3 COO) 3 (bpy) 4 ] n . Then, the Cu 12 bpy was used as a precursor to prepare copper azide-heteroatom co-doped porous carbon material (CA-HPCH for short). CA‑HPCH has a high copper azide content (89.43%), excellent ignition ability (H 50 ≥60 cm) and low electrostatic sensitivity (E 50 =1.1 mJ), better than ordinary copper azide performance. The miniature detonators fabricated by CA‑HPCH exhibited short ignition times (7.0 μs) and low ignition energies (0.106 mJ), outperforming most reported detonators. It provides a basis for the further design and synthesis of high-performance primary explosives.

Description

technical field [0001] The invention belongs to the intersecting field of nanometer chemistry and energy-containing materials, and in particular relates to a copper-sulfur cluster-based assembly material and a high-performance copper azide composite priming charge prepared by using it as a template. Background technique [0002] The priming charge is an energetic material that can quickly complete the combustion-to-detonation process (DDT) when encountering specific external stimuli, such as friction, impact, flame or static electricity. It is the core component of the micro-detonation device. At present, the commonly used primary explosive is a mixture of lead azide (LA) and lead styphate (LS), which have the problems of lead pollution and insufficient output energy when detonating. As an alternative, copper azide (Cu(N 3 ) 2 , CA) has attracted great attention in the past few decades due to its outstanding detonation power and environmental friendliness. However, due to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B35/00C01B21/08
CPCC01B21/08C06B35/00
Inventor 臧双全王乾有王珊董喜燕
Owner ZHENGZHOU UNIV
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