Establishing TA-Pb/Cu and SA-Pb/Cu interface catalyst shells on HMX surfaces via in situ coprecipitation to ameliorate the performances of HMX

作者：Guanchao Lan, Guoliang Jin, Jian Ruan, Xinping Zhao, Jianlong Wang, Jing Li · 发表于：Arabian Journal of Chemistry · 年份：2023 · DOI：10.1016/j.arabjc.2023.104720 · 被引用次数：10 · 研究领域：Energetic Materials and Combustion、Thermal and Kinetic Analysis、Flame retardant materials and properties

Lead/copper tannate (TA-Pb/Cu) and lead/copper salicylate (SA-Pb/Cu) interface catalyst shells are established on the surface of 1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane (HMX) via in situ coprecipitation to prepare [email protected]/Cu and [email protected]/Cu composites. The structures and properties of the obtained [email protected]/Cu and [email protected]/Cu composites are characterized in detail. Molecular dynamics simulations are performed to study the adsorption mechanism of TA-Pb/Cu and SA-Pb/Cu on HMX surface. The residues after [email protected]/Cu and [email protected]/Cu combusted in air are collected and characterized to study the catalytic effect of TA-Pb/Cu and SA-Pb/Cu on combustion. The study results show that TA-Pb/Cu shells are coated on HMX surface due to the excellent membrane-forming properties of TA, while SA-Pb/Cu shells are embedded in the gullies and holes of HMX surface. TA-Pb/Cu and SA-Pb/Cu shells can decrease the mechanical sensitivities and catalyze the decomposition and combustion of HMX, and the catalytic effects of in situ coprecipitation are better than that of physical mixing. In addition, the phase transition temperature of HMX in [email protected]/Cu is increased while that of [email protected]/Cu is decreased, illustrating that TA-Pb/Cu can enhance the thermal stability of HMX while SA-Pb/Cu can catalyze the phase transition of HMX.