The invention discloses a preparation method of a core-shell type nano metallic silver and explosive compound. The preparation method comprises the steps that 1, explosive
powder is added into a
dopamine-
Tris water solution to be stirred, and suction
filtration, washing with deionized water and
vacuum drying are carried out; 2, a
silver nitrate solution is prepared,
ammonium hydroxide is added foradjustment, a silver
ammonia solution is formed, and a surface
active agent is added into the silver
ammonia solution; 3, the explosive
powder obtained in step 1 is ultrasonically dispersed in water,and then added into the mixed suspension liquid obtained in step 2; 4, a
formaldehyde solution is added to the solution in step 3 while uniform shaking is carried out, and the mixed suspension liquidis placed in a water bath of a certain temperature, the mixture is shaken after standing for certain time, suction
filtration and
vacuum drying are carried out, and the core-shell type nano metallicsilver and explosive compound is obtained. According to the preparation method, the surface of the explosive
powder is pre-coated with a polydopamine layer, silver is promoted to be evenly settled onthe surface of
dopamine, it is ensured
silver particles are all settled on the surface of an explosive and are not independently gathered, and the
silver particles do not fall off after being covered.