Preparation And Characterization Of MIC Based On Microsphere Template Method

Metastable intermolecular composites (MIC) are nano reactive systems composed by oxidizer and reducing agent. Recently MIC has shown great application prospect in energetic materials. The energy density and combustion velocity have been greatly improved by decreasing the energy transmission distance and increasing the contact area under nanoscale, which makes the MIC combustion stable. However, the MIC reaction is generally empty of gas products, which influences MIC performance and its application in nano-energetic chip.In this article, based on the microsphere template idea, the MIC hollow microsphere and the array with voids are prepared to provide gas and energy transmission channel, which improves the MIC performance. The main work includes:(1) By using hydro-thermal method, this work takes cupric acetate as raw material, and urea, ammonia and PVP as additive agents to synthesize micro/nano-sized CuO with different morphologies such as hollow/solid sphere-like, plate-like, and branch-like. The influences of reactive system, reactive time, and reactive temperature on the morphology of CuO are analyzed. In addition, we pay attention to the CuO hollow sphere with a diameter of2um, and the research concludes that the material has a large specific area, and the micro hole on the sphere shell could act as a transmission tunnel for ion or other micro material. We also test the electrochemical characterization as the negative electrode of lithium cell. By ultrasonic mixing of the prepared CuO and the sized70nm Al, this work obtains the Al/CuO nEMs and characterizes the morphology and thermal behavior. The laser ignition energy of hollow sphere CuO/Al is only25mJ, being less than that of the solid sphere. (2) By taking colloidal crystal microsphere as template and applying gravity deposition method and czochralski method, firstly we obtain orderly aligned monolayer microsphere template, then construct the metal oxide framework array, and finally get the monolayer Al/Fe2O3MIC array with voids in a wide-bound by evaporation coating or megnetron sputtering, to improve the MIC reactive velocity.(3) By using colloidal crystal microsphere as core template, this work synthesizes SiO2@Fe2O3double shell hollow sphere with SiO2support shell. By adjusting the diameter of template, we obtain the hollow sphere with different diameters in100nm,200nm, and500nm. And the reaction time and concentration have been adjusted for wall thickness control of hollow sphere. The strength and the mechanical stability of the material have been improved with he SiO2support shell, and the hollow part could also be used for the energy transmission. What’s more, this work is convenient to further realize the relationship between hollow sphere structure and reaction performance.Based on the microsphere template method, we obtain the hollow MIC sphere and the MIC array with voids. By functional characterizations, we investigated the link between structure and behavior, and deeply understand the reactive pattern of MIC. This work could devote to the improvement of reactive intensity and reactive velocity of MIC.