Of Ammonium Dinitramide Catalytic And Surface Modification

The new oxidizer ammonium dinitramide(ADN) is considered to be an ecologicallypreferable alternative to ammonium perchlorate(AP) in solid propellants because of itshigh energy and chlorine-free products. Hence, ammonium dinitramide has attractedsubstantial attention in the energetic materials community.In this paper, the catalysis decomposition and surface modification of ammoniumdinitramide was investigated experimentally. Firstly, catalyzer with small particle size wasprepared by liquid chemical reduction, solution combustion synthesis and solid statereaction at room temperature. And then, based on the different properties of the catalystsprepared, the effect of catalytic characteristics on ammonium dinitramide of the metalpowder, metal oxidizer, composite metal oxidizer with double phase and other catalystswas investigated, and the catalytic mechanism was briefly analyzed. Secondly, the surfacechemical modification process was adopted to modify ammonium dinitramide withmacromolecule polymers, coupling agents and surfactants, and the effect of the surfacetreatment on the moisture rate and thermal decomposition characteristics.The experimental result shows that, the catalysts which contain transitional metals ofcopper and cobalt have good effect of catalytic characteristics on ammonium dinitramide,especially nanometer copper and cobalt. A hydrophobic thin-film is coated at the surface ofammonium dinitramide by the addition of surface modifiers, this film improves its surfacestructure and decline its strong polarities. Meanwhile, the formulation of this film delaysthe decomposition temperature.