36 results about "Nitroamine" patented technology

The invention belongs to the field of energetic materials, and discloses a method for coating nitroamine explosives by adopting an atomic layer deposition technique. In the method, two reaction precursors alternatively pass through a reaction cavity, and chemical reaction occurs on the surfaces of nitroamine explosive particles to form coating films. The coating film completely and uniformly covers the whole outer surface of each nitroamine explosive particle, and the thickness of the coating film can be precisely adjusted within a nanoscale range. The method is suitable for coating nitroamine explosive particles in micron order, nanometer order or millimeter order. When the thickness of the coating film is controlled to be within the nanoscale range, the content of the coating films only accounts for 0.1 percent to 5 percent of the total mass of the system, and therefore, the coating films have little influence on the nitroamine explosives. The electrostatic spark sensitivity of the nitroamine explosives coated through the method disclosed in the invention is significantly reduced. The method has the advantages of high degree of automation and good safety performance. The coated nitroamine explosive particles can be directly used without postprocessing, so that the method is easy to realize and generalize in industry.

The invention relates to a composite solid propellant based on aluminum powder coated with a nitramine oxidant and a preparation method. Dopamine surface-modified aluminum powder (Al@PDA) is coated with a nitramine oxidant (such as cyclotrimethylenetrinitramine, RDX) through a spraying drying technology to form compact core-shell-structured microspheres (Al@PDA@RDX) so as to replace RDX and Al intraditional propellant. Composite microspheres adopting interface interactions between the metal aluminum powder and the nitramine oxidant are adopted so that the oxidant and the aluminum powder in the propellant are in close contact, and can rapidly react when the propellant is combusted, and adverse influences of oxidant decomposition product diffusion and agglomeration of aluminum powder on propellant combustion can be suppressed. The preparation is simple and convenient, a spray granulation process, and industrialized production is liable to achieve. The composite solid propellant is simple in preparation method, and contents of components in a formula can be accurately controlled.

Methods, systems and related apparatus for fluorescence-based detection of various nitro and peroxide compounds.

The invention relates to a nitramine explosive 1,3,5-trinitro-2,3-dihydro-1H-imidazo [4,5-b] pyridine-2-ketone and a preparation method thereof. The method comprises the steps of achieving a reaction close loop of 2,3-diaminopyridine and urea at a high temperature, extracting the mixture by boiled ethanol after the reaction is finished, filtering to obtain dark brown solid; achieving nitrification reaction on 2,3-dihydro-1H-imidazo [4,5-b] pyridine-2-ketone in different nitrification systems; pouring the mixture into trash ice after the reaction is finished, filtering and washing a filter cake to become neutral, and drying to obtain light yellow solid. The compound containing energy synthetized by the method is novel in structure, mild in reaction condition, simple in technology, safe and reliable to produce, simple to carry out post-treatment on the product, small in damage to the environment, does not need a special device, and meets the basic requirements of industrial amplification production.

The invention discloses a preparation method of a high-energy insensitive aluminum-containing explosive. The method comprises the following steps: dissolving nitrocotton, nitramine explosive and ammonium perchlorate in a mixed solvent to form a mixed solution; adding nano Al powder into the mixed solution, and dispersing to form a stable suspension; and sucking the suspension by using an injector with a needle head, fixing the suspension on an electrostatic sprayer, receiving the suspension by using an aluminum foil baffle, connecting a positive electrode to the needle head of the injector, connecting a negative electrode to the aluminum foil baffle, and adjusting process parameters to enable the suspension to form stable spray with a taper angle of 20-60 degrees at the nozzle of the needle head so as to obtain the high-energy insensitive aluminum-containing explosive. The high-energy insensitive aluminum-containing explosive prepared by the invention has the advantages of higher energy and density, favorable safety performance, less solvent used in the preparation process, low cost and safe production process.

The invention relates to a composite solid propellant based on a multi-scale modified nitramine oxidant. The propellant is based on high-nitrogen two-dimensional conjugated structure doped modified nitramine, and through insensitive modification of the main component nitramine oxidant, the sensitivity of the nitramine oxidant is reduced while the energy of the nitramine oxidant is improved, and the contradictory problem of high energy and insensitive is effectively solved, and the production and use safety of the propellant is improved. According to the preparation method, PDA is wrapped on the surface of modified nitramine, hydroxyl on the surface of the PDA is taken as an active site of a coordination reaction, a nano CuO and nano Fe2O3 catalyst is grown in situ on the surface of the PDA by utilizing a hydrothermal reaction, and a catalyst/oxidant integrated core-shell structure (qy-RDX coated CuO and qy-RDX coated Fe2O3) is obtained and is used for replacing nitramine and a catalyst in a traditional propellant formula. The catalytic coating of the modified nitramine can significantly improve the catalytic efficiency of the propellant and reduce the decomposition rate and pressure sensitivity of the propellant, so that the pressure index of the propellant is reduced.

A training aid for use in training canines to detect an explosive material includes an explosive material adsorbed in the pores of a high surface area mesoporous or nanoporous host material. By adjusting the surfaces of the pores of the substrate material, the substrate can accommodate various types of explosive materials in a non-detonable and non-flammable manner, including nitroaromatics, nitroamines, nitrate-based explosives, and peroxide-based explosives. When the training aid is in an unsealed condition, a continuous flux of explosive material is released without providing any explosive or flame hazard to the trainer and canine.

The invention relates to a synthetic method of diethanol nitramine dinitrate. The method comprises the following steps: adding acetic anhydride containing a small amount of fuming nitric acid I into areaction kettle as a backing material, simultaneously adding diethanol amine hydrochloride and fuming nitric acid II at a certain reaction temperature, heating to carry out heat preservation reactionafter the feeding is finished, and finally cooling and washing the reaction product, carrying out suction filtration and drying the reaction product to obtain the final product. The method is high inreaction speed and uniform in heat release, and the synthesis process is easy to control; the product diethanol nitramine dinitrate is synthesized in one step, so that the reaction efficiency is improved; in the product synthesis process, the existence time of the unstable intermediate in the reaction system is short, so that the unstable intermediate can be quickly converted into diethanol nitramine dinitrate, and compared with a magnesium nitrate synthesis method, the safety is obviously improved.

Provided is a process for preparing alkyl diamine compounds in high purity. The process utilizes an alkyl amine compound during the reduction of a nitroamine, resulting in reduction of the concentration of undesired byproducts.

The invention relates to 3, 6-dinitramine [1, 2, 4] triazolo [4, 3-b] [1, 2, 4] triazole as well as an ionic salt, a preparation method and application thereof, wherein the 3, 6-dinitramine [1, 2, 4] triazolo [4, 3-b] [1, 2, 4] triazole has a better application prospect in high-energy explosives. According to the molecular sturcutre of 3, 6-dinitramine [1, 2, 4] triazolo [4, 3-b] [1, 2, 4] triazole, a nitramine group perpendicular to the N5 position of a fused ring skeleton is removed from the molecular structure of 3, 6-dinitramine [1, 2, 4] triazolo [4, 3-b] [1, 2, 4] triazole, so that when the 3, 6-dinitramine [1, 2, 4] triazolo [4, 3-b] [1, 2, 4] triazole is converted into anions, a completely planar large conjugated system is formed, the pi-pi interaction between layers is enhanced, and the thermal stability and sensitivity of the dinitramine triazolo triazole energetic ionic salt are improved. According to the invention, the energetic ion salt is tested by a BAM impact sensitivity instrument, and the impact sensitivity is 7-10 J; a BAM friction sensitivity instrument is used for testing to find that the friction sensitivity is 140-220 N. In combination with detonation performance and sensitivity, the detonation performance of the hydrazinium salt is equivalent to that of RDX, the sensitivity is superior to that of RDX, and the comprehensive performance is optimal.