叠氮化物
化学
爆炸物
纳米尺度
碳化
氢氧化物
复合数
插层(化学)
化学工程
起爆
纳米结构
纳米复合材料
介孔材料
纳米技术
复合材料
无机化学
材料科学
有机化学
吸附
催化作用
工程类
作者
Long Li,Zhenzhan Yan,Wenchao Tong,Chuan Hu,Shuang Wang,Haojie Li,Yang Li,Ji-Min Han
标识
DOI:10.1021/acs.inorgchem.3c03349
摘要
It is of great significance to develop efficient methods for preparing high-content modified nanoscale lead azide (LA) composites used in microinitiating devices. In this work, a structurally controllable salicylate-intercalated lead hydroxide with a nanoscale mesoporous structure is designed. Using it as a precursor, carbon-based lead azide (LA/C) and salicylate-based lead azide (LA/SA) are fabricated by the gas-solid azidation of the framework (GAF) method within 3 h, greatly reducing the preparation time of nano-LA composites. The characterizations of the composites demonstrate that the Pb in the precursors is transformed into nanoscale LA attached to the salicylate radical or its carbonized skeleton. Due to the unique embedded nanostructures and excellent electrical and thermal conductivity of salicylate-derived carbon materials, LA/C exhibits excellent electrostatic safety (E50 = 0.25 J) and flame sensitivity (H50 = 28 cm). The adjustable organic-inorganic ratio of intercalated hydroxides allows the LA content in LA/C to reach as high as 92.5%, enabling 6.50 mg of LA/C to successfully detonate secondary explosive CL-20 in a microinitiating device, demonstrating an amazing detonation ability superior to other reported LA complexes. The research provides a new perspective for the development of nanoscale LA composites with high LA content and appropriate sensitivity.
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