Study On The Morphological Control Of Porous Copper And Thermal Analysis On Its Energetic Composite Film

With the development of manufacture technology of advanced porous metal materials, to prepare porous metals with high porosity and specific surface area through green and simple methods has become a mainstream trend. In this dissertation, three-dimensional honeycomb-like porous copper was prepared through electrodeposition using hydrogen bubbles evolved from acidic solution containing cupric ions as dynamic templates. The walls of porous copper were structured by dendritic copper nanofractals, nanorods and nanoparticles, which lead to the hydrophobic property of porous copper. The morphology and pores distribution can be controlled or modified by the addition of various additives into the basebath or electrodeposition parameters. Field emission scanning microscope(FESEM) and laser confocal scanning microscope(LCSM) were employed to characterize the morphology of copper dendrites and pore size distribution, respectively.Various additives, including NaCl, EDTA(Ethylene diamine tetraacetic acid disodium salt), Na2SO4,(NH4)2SO4, were introduced into the electrolytes of H2SO4and CuSO4(defined as basebath) to investigate their effects on morphology of copper dendrites. It turned out that:the dendrites became much slender than those deposited in basebath and the walls turned tight and smooth in the presence of chloride ions or Na2SO4; the wheat-like crystals and tuberculate crystals were evolved by the addition of (NH4)2SO4and EDTA, respectively. Especially, NaCl and EDTA show synergistic effect in copper electrodeposition and electrocrystallization process, which lead to slender copper dendrites and no walls collapse occurred.The pore size distribution and pore density of porous copper were obviously affected by electrodeposition parameters. Both the surface pore diameter and pore density increased with the deposition going on. The pore density increased as the current density arising from1A/cm2to4A/cm2.The different morphology of crystals was explained by the fractal growth theory. A stack-up layers" model was proposed to clarify the formation of three-dimensional porous copper and declare effects of various additives and deposition parameters pore size distribution.Then certain amount of saturated solution of AP(ammonium perchlorate) was dropped onto as-prepared foamed porous copper film, to synthesize a composite film of AP and PCu. Furthermore, Simultaneous thermal experiment was carried out on the composite to analyze the thermal effects. The results showed that the initial decomposition temperature of AP shifted ahead of crystal transformation temperature in the presence of PCu, which was analogous to the catalytic effect of nano metal particles. That fierce exothermic reaction between AP and porous copper occurred in the linear heating process was proved by the disappearance of endothermic effect of crystal transformation of AP...