Composite energetic material with embedded structure and preparation method thereof

Abstract

The invention discloses a composite energetic material with an embedded structure and a preparation method of the composite energetic material. A 3,4-dinitrofurazan-based furazan oxide / aluminum powdercomposite energetic material with an embedded structure is prepared by adopting a solvent-non-solvent method; 3,4-dinitrofurazan-based furazan oxide is dissolved into ethyl acetate, the solution is dropwise added into n-hexane turbid liquid of aluminum powder, and the dropwise adding speed, the stirring speed and the preparation time are controlled to obtain the embedded composite energetic material. The method provided by the invention can be used for effectively reducing the diffusion distance between 3,4-dinitrofurazanyl furazan oxide and aluminum powder, the crystal morphology and the surface state of 3,4-dinitrofurazanyl furazan oxide are optimized, the prepared composite energetic material has the advantages of being high in stacking density, low in sensitivity and high in detonation heat, and the detonation heat of the 3,4-dinitrofurazanyl furazan oxide pressed aluminum-containing explosive can be effectively improved. The composite energetic material having the embedded structure is prepared from the following components in percentage by mass: 60 to 75 percent of the 3,4-dinitrofurazanyl furazan oxide and 25-40% of the aluminum powder.

Description

technical field [0001] The invention relates to a composite energetic material with an embedded structure and a preparation method thereof, belonging to the field of explosive synthesis. Background technique [0002] 3,4-Dinitrofurazanyl furazan oxide is a new type of high energy density material, which integrates furazan, furazan oxide and nitrate base, with a density of 1.937g cm -3 , detonation velocity 9250m·s -1 , explosive heat 5798J·g -1 , has the advantages of high density and high energy, and is the only energetic material that can compete with hexanitrohexaazaisopentazane in energy at this stage. It is worth noting that there is no hydrogen atom in the 3,4-dinitrofurazanyl oxide furoxan molecule, and the oxygen balance is better than that of hexanitrohexaazaisopentazane. Therefore, its energy The potential is better than that of the widely used hexanitrohexaazaisopentazane. However, the biggest disadvantage of 3,4-dinitrofurazanylfuroxan is high sensitivity and...

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Problems solved by technology

Yao Lina, Wang Cailing, Zhao Xingxiang, Dai Zhixin, Wang Haiqing. The effect of recrystallization on the morphology of DNTF and the detonation performance of aluminum-containing explosives. Explosive Equipment, 2015, 44(6): 25-33. The detonation heat and detonation velocity performance of the aluminum-containing explosive of 3,4-dinitrofurazanylfuroxan, and the explosive sensitivity meet the requirements of use, but the 3,4-dinitrofurazanyl oxide furazan containing 30% aluminum powder The heat of detonation of dinitrofurazanyl oxide furazanyl press-packed explosive (JHaL-1) can only reach 7500J·g -1

Therefore, although the conversion of 3,4-dinitrofurazanylfuroxan from the continuous phase to the discontinuous phase through the coating of the desensitizer in the press-packed explosive can effectively improve the safety, it will also cause the following problems: (1) Will reduce the energy release level of aluminum-containing explosives

There is simple physical mixing between the components in aluminum-containing explosives, and compared with melt-cast explosives, 3,4-dinitrofurazanylfuroxan and aluminum powder in press-packed explosives will be converted from close contact to desensitized agent Isolation, greatly reduces the oxygen concentration around the aluminum powder, inhibits the reaction completeness and energy level of aluminum-containing explosives; (2) low molding density

Due to the crystal form and surface properties of 3,4-dinitrofurazanylfuroxan, the molding density of JHaL-1 explosive can only reach 93%-94% of the theoretical density

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