Preparation of Cyclotrimethylenetrinitramine‐Copper Oxide Core‐Shell Particles and Their Thermal Decomposition Kinetics

Abstract

The effect of interfacial contact conditions between cyclotrimethylenetrinitramine (RDX) and copper oxide (CuO) on the thermal decomposition kinetics of RDX was investigated in this study. CuO was deposited onto the surface of superfine RDX particles to form RDX@CuO coreshell structure through RF magnetron sputtering technology. The thermal decomposition characteristics of RDX, RDX@CuO and RDX-CuO ultrasonic mixture were studied through thermo-gravimetric method. Kissinger and Kissinger-Akahira-Sunose methods were used to obtain kinetic parameters of thermal decomposition processes. It was found that the temperature corresponding to maximum weight loss rate decreased in the order of RDX > RDX-CuO > RDX@CuO. However, the apparent activation energy of RDX decomposition did not show apparent difference for the two kinds of CuO-containing samples. The results indicate that the interfacial contact conditions between RDX and CuO have an effect on the thermal stability of RDX but do not alter the thermal decomposition paths of RDX.

Effect of the Ni and NiO Interface Layer on the Energy Performance of Core/Shell CuO/Al Systems

“…All the exothermic peaks are sharp and strong with a right shift as the heating rate increases. The activation energies of these three kinds of nanowire thermite films are then calculated from existing data based on the Kissinger–Akahira–Sunose method, where β stands for the heating rate (°C·min –1 ), T p represents the maximum temperature of the exothermic peak in the DSC curves (°C to K, the units are converted), E a represents the activation energy (kJ/mol), A represents the pre-exponential factor (s –1 ), and R is the universal gas constant. Therefore, the activation energy can be determined from the linearly fitted slope of the plot of ln­(β/ T p 2 ) against 1/ T p , as shown in Figures S4–S6.…”

The Art of Framework Construction: Core–Shell Structured Micro-Energetic Materials

“…By coating metal on the explosive surface through vapor phase deposition or magnetron sputtering methods, the explosives are free from morphology or size change, which is pivotal to integrate the multiple functionalities of core–shell materials and maintain the fundamental characteristics of core explosives. Zhou et al [ 99 ] prepared RDX@copper oxide (CuO) core–shell particles by RF magnetron sputtering technology. CuO was expected to improve the combustion efficiency and performance of RDX-based propellants as an additive.…”

“…Apart from polymers and conventional explosives, some novel materials, such as CuO, graphene (G), graphene oxide (GO) and carbon nanotubes (CNTs) were introduced to prepare CSEs due to their unique electrical, thermal, mechanical and structural properties [ 70 , 99 , 103 , 120 , 121 ]. rGO together with G were selected as shell materials to coat HMX through an in situ chemical reduction coating method [ 43 ].…”

“…Many kinds of nanomaterials have been developed and tested for catalytic decomposition of explosives, and thereby improve the combustion efficiency and performance of propellants. CuO was deposited onto the surface of superfine RDX particles to form RDX@CuO CSE through RF magnetron sputtering technology [ 99 ]. It was found that intimate interfacial contact was realized with a thin film of 50 nm, and morphology or size change of RDX was avoided.…”

“…This surface modification strategy features high efficiency and mild preparation conditions, which provide the potential for large-scale fabrication of high explosives. properties [70,99,103,120,121]. rGO together with G were selected as shell materials to coat HMX through an in situ chemical reduction coating method [43].…”