Nanoscale Homogeneous Energetic Copper Azides@Porous Carbon Hybrid with Reduced Sensitivity and High Ignition Ability

Abstract

Research on green primary explosives with lead-free and excellent ignition performance is of significance for practical applications. In this work, we have developed a novel, green, and facile strategy for synthesizing copper azide@porous carbon hybrids (CA@PC) based on ionic cross-linked hydrogel with low-cost cellulose derivatives as the starting material, in which the CA nanoparticles are uniformly distributed in the porous carbon skeletons. The detailed characterizations and control experiments demonstrated that such an outstanding performance originates from the excellent electric conductivity of nanoscale carbon cages. With the favorable unique structures, the as-prepared hybrids can greatly benefit a new type of energetic materials, which exhibit a very low electrostatic sensitivity of 1.06 mJ. Interestingly, the hybrids possess a high ignition ability, and the flame sensitivity can even achieve 47 cm, superior to those well-developed CA-based materials reported previously. This work paves the way toward the design and development of next-generation highly efficient energetic materials.

Sustainable Electrosynthesis of Porous CuN3 Films for Functional Energetic Chips

“…To date, a variety of copper azide-based materials, such as three-dimensional porous copper azide, nanoporous copper azide, metal–organic frameworks-derived copper azide, , and copper azide@C hybrid, have been fabricated by means of a common gas–solid azidation between copper and gaseous hydrazoic acid (HN 3 ). The gas–solid azidation has technically demonstrated advantages in controllability of the morphology and composition for the resulting products.…”

Preparation of a nanoscale homogeneous energetic lead azides@porous carbon hybrid with high ignition ability by in situ synthesis

“…In order to compare the ignition capability and safety performance between the nano-sized LA@PC thus prepared and the rational LS/LA system, the same methods and equipment reported in our recent work are used to test the ame sensitivity and electrostatic sensitivity. 24 The value of H 50 (ame sensitivity) corresponds to the height from standard black powder pellets to sample for 50% probability of ignition, revealing the ignition ability of the primary explosives. From Fig.…”

“…Fortunately, in our previously reported work, copper azide@porous carbon hybrids (CA@PC) complex with nano-scale CA uniformly distributed on the carbon skeleton was feasibly prepared from a cheap and readily available gel. 24 This method has provided a new idea to improve the ame sensitivity of LA and may fundamentally solve the safety problem of the LA/LS system.…”

Fabrication of nanoscale core–shell structured lead azide/porous carbon based on a metal–organic framework with high safety performance

“…31,32 However, these physical mixing methods of adding carbon materials to the reaction solution will cause problems such as poor sample uniformity and high risks. 33,34 Therefore, in a previous report, 33 we employed an in situ synthesis method to prepare nano-scale carbon-based lead azide composites using a lead-containing gel as the raw material. Interestingly, the carbonbased lead azide composite at the nanometer scale exhibits excellent electrostatic sensitivity and ignition ability, which mainly results from the nanoscale effect of LA and the excellent electrical and thermal conductivity of the carbon skeleton.…”