Preparation And Characteristic Of NaClO₄/Porous Copper Composite Energetic Material

In the paper, porous copper have been successfully electrodeposited on the hydrogen bubble template. The base bath is made up of copper sulfate and sulfuric acid. Study the effects of cathode current density, deposition time and additives to the average main diameter on the surface of the porous copper film, the thickness of film, the 3D morphology of film and the size of the copper dendrites. SEM, XRD and laser confocal microscope were used to analysis the structure and morphology of porous copper film. The results show that there are small holes under the surface pore of film, and the sponge-like wall of porous copper is made up of small copper dendrites. The basis of preparation conditions are determined as 2 A-cm-2 30s. Under this condition, the surface pore size of the film distribute in the range of 50μm-70μm. the thickness of the film is about 120μm.XRD show that the film is made up of copper. When NH4Cl is added to the bath, the pore size of the film become larger and the size of copper dendrites become smaller. When the (NF4)2SO4 was added to the bath, the pore size of the film is became smaller, but the size of copper dendrites is not changed.Dissolving NaClO4 in methanol and dropping the solution to porous copper film. The methanol was evaporated to leave NaClO4·H2O in the gap between copper dendrites. Using SEM, XRD, DSC to analysis the change of porous copper film after it composite NaClO4·H2O 0 The results show that, there are NaClO4·H2O in the gap between copper dendrites. The porous copper can react with NaC104 and produce heat. When the size of porous copper dendrites is smaller, the peak temperature of DSC exothermic peak is lower.Using SEM, XRD, DSC to research the reaction mechanism of porous copper with NaClO4. By using Kissinger method, the activation energy of the two exothermic reactions was calculated. The results show that, the first step reaction solid phase reaction between porous copper and NaCl4. The first reaction produce CuO and it has catalytic effect on the decomposition of the excess NaClO4. The melting endothermic peak temperature of NaClO4 advance about 50℃and the thermal decomposition peak temperature of NaClO4 advance about 80℃.The activation energy of two reactions were 122.04 KJ-mol-1 and 359.8 KJ-mol-1.