Preparation method of high energy density material

Abstract

The invention discloses a preparation method of a high energy density material. The method is based on the mass of 4,4'-2(4-amino-1,2,5-oxadiazole-3-yl)-2,2'-linked 1,2,4-oxadiazole and oxidation system The volume ratio is 1:5~50, g:mL, combine 4,4'-2(4-amino-1,2,5-oxadiazole-3-yl)-2,2'-1,2, Slowly add 4-oxadiazole into the oxidation system and stir. The temperature is controlled below 0°C. After the addition is complete, the temperature of the reaction system is raised to 20-45°C for reaction. After the reaction is completed, it is lowered to room temperature, poured into ice water, extracted, washed, and dried , to obtain 4,4'-2(4-nitro-1,2,5-oxadiazole-3-yl)-2,2'-linked 1,2,4-oxadiazole after evaporating the solvent to dryness. The synthesis method of the invention is simple, the highest yield can reach 89%, the real reaction is mild, mass production can be realized, and the invention is widely used in fields such as explosive formula and other explosive products.

Description

technical field [0001] The invention relates to the field of preparation of energetic materials, and relates to a preparation method of high energy density materials. Background technique [0002] Synthesis of new high-energy-density materials is one of the important contents of research and development in the field of energetic materials. The main synthesis goal is a new generation of energetic materials with high energy, high density, insensitivity and good thermal stability, in which density is high energy density. One of the most important properties of materials, the detonation velocity of energetic materials increases with the increase of density, and the detonation pressure is proportional to the square of the density, that is to say, the level of density directly affects the level of energy of energetic materials. However, there is an inherent contradiction between energy, sensitivity and stability. The higher the energy, the higher the sensitivity and the worse the ...

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Problems solved by technology

For example, the crystal density of hexanitrohexaazaisowurtzitane (CL-20) reaches 2.035g / cm 3 , the detonation velocity is 9455m / s, the detonation pressure is 46.7GPa, the impact sensitivity is 4J, and the friction sensitivity is 48N, but the simple explosive has the problem of crystal transformation, and the production cost is high and the process is complicated; ,4-Oxadiazole)]-5,5'-Dinitroamine (ICM-101) The measured density is 2.0g / cm 3 , single crystal density is 1.986g / cm 3 , the detonation velocity is 8780m / s, the detonation pressure is 37GPa, the impact sensitivity is 15.5J, and the friction sensitivity is 60N, but it uses the highly toxic compound cyanogen bromide (BrCN) to form a ring, which has certain defects in safe production and environmental protection

[0003] Philip F. Pagoria et al first synthesized 4,4'-2(4-nitro-1,2,5-oxadiazol-3-yl)-2,2'-linked 1,2,4-oxadi azole, but its 90% H 2 o 2 / CF 3 COOH / CH 3 NO 2 As an oxidation system, 90% H was added dropwise at 50°C 2 o 2 , the yield is only 73%, the operation process is dangerous, and it is impossible to achieve mass production synthesis, which greatly limits the 4,4'-2(4-nitro-1,2,5-oxadiazol-3-yl)-2 , Application of 2'-linked 1,2,4-oxadiazoles in the field of synthesis of high-energy insensitive energetic compounds (Philip F. Pagoria, et al, Synthesis and characterization of multi-cyclicoxadiazoles and hydroxytetrazoles as energetic materials)

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