4.7 Article

Facile Synthesis of Energetic Nanoparticles of Copper Azide with High Initiation Ability for Micro-Initiator Applications Using Layered Copper Hydroxide

Journal

INORGANIC CHEMISTRY
Volume 61, Issue 24, Pages 9096-9103

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.2c00619

Keywords

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Funding

  1. National Natural Science Foundation of China [21801016]
  2. State Key Laboratory of Explosion Science and Technology [ZDKT19-01, QNKT20-05]

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This study reported two types of CA composites with excellent electrostatic sensitivity and detonation ability. CA/C exhibited high CA content of 93%, superior ignition ability and detonation ability compared to pure CA and most previously reported CA-modified materials. CA/SA also showed extremely low electrostatic sensitivity.
Copper azide (CA) is one of the preferred primary explosives in the micro-initiating device, and it is of conducive significance to develop high-content CA-modified materials. In this work, we reported two types of CA composites with CA nanorods embedded in carbon nanosheets (CA/C) and CA distributed on salicylic acid (CA/SA) using layered copper hydroxide nanosheets intercalated with salicylic acid as the precursor. The detailed characterizations demonstrated that CA/ C exhibits eximious electrostatic sensitivity (1.06 mJ) due to the inherent structural characteristics of CA/C such as the limitation of the free movement of CA by the layered structure and preeminent electrical conductivity of carbon nanosheets. Surprisingly, CA/C with nearly 1.0 mg in the miro-initiating device can reliably detonate Hexanitrohexaazaisowurtzitane (CL-20). CA/C exhibits extremely high CA content (93%), excellent ignition ability, and detonation ability, and its performance is superior to pure CA and most CA-modified materials reported previously. CA/SA also has an excellent detonation ability and its electrostatic sensitivity is as low as 0.92 mJ. These findings provide a new perspective for the development of high-performance primary explosives for the micro-initiating device.

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