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65 results about "Hexanitrohexaazaisowurtzitane" patented technology

Hexanitrohexaazaisowurtzitane, also called HNIW and CL-20, is a nitroamine explosive with the formula C₆H₆N₁₂O₁₂. The structure of CL-20 was first proposed in 1979 by Dalian Institute of Chemical Physics. In the 1980s, CL-20 was developed by the China Lake facility, primarily to be used in propellants. It has a better oxidizer-to-fuel ratio than conventional HMX or RDX. It releases 20% more energy than traditional HMX-based propellants, and is widely superior to conventional high-energy propellants and explosives.

Preparation method of hexanitrohexaazaisowurtzitane and 2,5-dinitrotoluene eutectic explosive

The invention discloses a reparation method of a hexanitrohexaazaisowurtzitane (CL-20) and 2,5-dinitrotoluene (DNT) eutectic explosive and belongs to the field of energetic materials. Based on the mechanism of eutectic formation, a novel high-energy and low-sensitivity eutectic explosive is formed by high-energy and high-sensitivity CL-20 and low-sensitivity DNT through intermolecular hydrogen bonds. The preparation method is of significance on search of the energetic materials and is an effective modification means for a high-energy explosive. The preparation method specifically comprises the following steps: adding the CL-20 and DNT in a molar ratio of 1: 2 at normal temperature into a proper amount of a crystallizing agent; carrying out ultrasonic oscillation and uniformly mixing to obtain a saturated crystallizing solution; and slowly evaporating a solvent at room temperature; and washing and drying to obtain the light yellow CL-20 and DNT eutectic explosive. According to the CL-20/2,5-DNT eutectic explosive prepared by the preparation method, the density and smelting point are remarkably improved compared with those of DNT. The eutectic explosive as a novel insensitive explosive has a relatively broad application prospect and is simple in process flow and mild in experimental condition. The product is good in safety and relatively high in quality.
Owner:XIAN MODERN CHEM RES INST

Preparation method of hexanitrohexaazaisowurtzitane/p-benzoquinone cocrystal explosive

The invention discloses a preparation method of a hexanitrohexaazaisowurtzitane/p-benzoquinone cocrystal explosive. Firstly a saturated solution of hexanitrohexaazaisowurtzitane and a saturated solution of p-benzoquinone are prepared using a crystallization solvent, and then the solvent is allowed to evaporate through a constant-temperature incubator, followed by crystallization to prepare a hexanitrohexaazaisowurtzitane/p-benzoquinone cocrystal explosive. The invention has the benefits as follows: the crystal density of the hexanitrohexaazaisowurtzitane/p-benzoquinone cocrystal explosive is up to 1.737 g/cm3, the melting point of the cocrystal explosive is 132 DEG C and is greatly increased by 17 DEG C as compared with relatively-pure component PBQ, and the cocrystal decomposition temperature is lower than that of both CL-20 and BQ and 207 DEG C lower than that of PBQ. Therefore, by virtue of cocrystallization, the thermal decomposition behavior of the explosive can be obviously controlled, the high efficiency and desensitivity of cocrystallization of the explosive are achieved, the safety of the explosive is improved, and the explosive has a good application prospect in high-energy low-sensitivity ammunition.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS

Boron-containing explosive and preparation method thereof

The invention discloses a boron-containing explosive and preparation method thereof. The preparation method comprises the following steps: mechanically activating aluminum powder, boron powder and polytetrafluoroethylene into high-energy composite particles by adopting a reaction inhibition ball milling process, so that the surface of the boron powder is coated with the aluminum powder and the polytetrafluoroethylene, and the diffusion distance between the boron powder and the polytetrafluoroethylene and the diffusion distance between the boron powder and the aluminum powder are reduced, the combination tightness degree of the boron powder, polytetrafluoroethylene and aluminum powder is improved, and the reaction completeness of the boron powder is improved; then mixing the high-energy composite particles with a high-energy explosive so as to improve the energy level of an explosive formula system; and finally adding an adhesive and a desensitizer, and performing kneading to form the boron-containing explosive. The boron-containing explosive disclosed by the invention comprises the following components in percentage by mass: 50%-60% of hexanitrohexaazaisowurtzitane (CL20); 15%-30%of aluminum powder; 5%-10% of boron powder; 10%-20% of polytetrafluoroethylene; and 1%-2% of a vinylidene fluoride- perfluoropropylene copolymer. The explosive is suitable for warm-pressing warhead charging and penetration warhead charging.
Owner:XIAN MODERN CHEM RES INST

Preparation method of monodispersed hexanitrohexaazaisowurtzitane micron hollow spheres

The invention discloses a preparation method of monodispersed hexanitrohexaazaisowurtzitane micron hollow spheres. The preparation method comprises the following steps of: A, weighing a certain amount of hexanitrohexaazaisowurtzitane, adding the hexanitrohexaazaisowurtzitane into an organic solvent, and heating and stirring till the hexanitrohexaazaisowurtzitane is fully dissolved; and B, sucking the solution in the step A into an injector with a flat syringe needle, fixing the injector on a micro boost pump, setting parameters, adjusting the distance from the syringe needle to a collector, adjusting voltages on the syringe needle and the collector, and keeping a Taylor cone on the syringe needle for a while to obtain the monodispersed hexanitrohexaazaisowurtzitane micron hollow spheres. The product is spherical in particle morphology and narrow in distribution of particle dimension. The microspherical particles are composed of nanoparticles and have an important application prospect in the field of primary explosives and the like. The process flow is simple, and the prepared microspherical particles do not need further post-treatment, and the preparation method is mild in experimental condition and good in safety.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS

Nano epsilon crystal form hexanitrohexaazaisowurtzitane (CL-20) explosive and massive preparation method thereof

The invention discloses a nano epsilon crystal form hexanitrohexaazaisowurtzitane (CL-20) explosive and a massive preparation method thereof. The preparation method is characterized by comprising the following steps: dissolving CL-20 explosive into a solvent to prepare an explosive solution; pre-cooling a non-solvent; heating the explosive solution to a certain temperature, ejecting the explosive solution into the pre-cooled non-solvent under stirring and ultrasonic waves, and finally carrying out solid-liquid separation, washing, purification, and drying to obtain the nano epsilon crystal form hexanitrohexaazaisowurtzitane (CL-20) explosive. The problem solves the problem that in a conventional solvent-non-solvent rapid crystallization method, crystal transformation of CL-20 happens easily; the epsilon crystal form hexanitrohexaazaisowurtzitane (CL-20) explosive is obtained through direct crystallization; the technical process is simple, the operation is convenient, moreover, the epsilon crystal form hexanitrohexaazaisowurtzitane (CL-20) explosive can be produced in batches, and the yield of each batch can reach 100 grams. By optimizing the technological parameters, epsilon crystal form CL-20 powder with an average particle size less than 500 nm can be obtained.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS

Method for preparing BTF-HNIW (benzotrifuroxan- hexanitrohexaazaisowurtzitane) eutectic explosive

The invention discloses a method for preparing a BTF-HNIW (benzotrifuroxan- hexanitrohexaazaisowurtzitane) eutectic explosive. The method comprises the following steps of: (1) preparing a saturated solution of BTF-HNIW, namely adding sufficient BTF into a crystallization solvent, raising the temperature to be between 20 and 50 DEG C, dissolving and filtering to obtain a saturated solution of the BTF, and adding sufficient HNIW into the saturated solution of the BTF, dissolving and filtering to obtain the mixed saturated solution of BTF-HNIW; and (2) preparing the BTF-HNIW eutectic explosive, namely placing the mixed saturated solution of the BTF-HNIW into a beaker, placing the beaker in a constant temperature incubator and keeping standing, evaporating a solvent, and drying to obtain the BTF-HNIW eutectic explosive. By the method, the free-running property and energy of the BTF are effectively improved, the sensitivity of the HNIW is reduced, and the safety of the HNIW is improved, so that the BTF-HNIW eutectic explosive is high in free-running property, high in detonation performance and high in safety and can be used as a novel high-energy initiating explosive. The method for preparing the BTF-HNIW eutectic explosive is simple.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS

Preparation method of high-energy composite structure explosive

The invention discloses a preparation method of a high-energy composite structure explosive, which comprises the following steps: forming a quasi-core-shell structure by a metastable intermolecular composite material, polydopamine and an ammonium nitrate explosive, wherein the ammonium nitrate explosive is coated by the metastable intermolecular composite material, a bonding interface between the metastable intermolecular composite material and the ammonium nitrate explosive is made of polydopamine, the metastable intermolecular composite material is composed of nano aluminum powder and one of ferric oxide, copper oxide and polytetrafluoroethylene, the mass ratio of the nano aluminum powder to any one of ferric oxide, copper oxide and polytetrafluoroethylene is (1-4):(3-5), and the ammonium nitrate explosive is one or more of cyclonite RDX, octogen HMX and hexanitrohexaazaisowurtzitane CL-20. The preparation method provided by the invention is simple in process, and the structure of the high-energy composite structure explosive and the ratio of the modified ammonium nitrate explosive to the metastable intermolecular composite material can be accurately controlled through reaction conditions and doping amount; and the used raw materials are low in cost, and large-scale batch preparation can be realized.
Owner:SOUTHWEAT UNIV OF SCI & TECH

Simulation method for CL-20/TNT (Hexanitrohexaazaisowurtzitane/Trinitrotoluene) eutectic crystal base compound

The invention discloses a simulation method for CL-20/TNT (Hexanitrohexaazaisowurtzitane/Trinitrotoluene) eutectic crystal base compound. The method comprises the following steps that: opening the crystal information file of CL-20/TNT eutectic crystal by a material workstation, changing all N-O single bonds in the file into virtual double bonds, and changing a benzene ring into a resonant mode virtual double-bond benzene ring; establishing an ultra-coating model, and cutting the ultra-coating model along (001) and (010) crystal surfaces to obtain three groups of cut models; establishing a PLA(Polylactic Acid) molecular chain, compressing a constructed PEG (Polyethylene Glycol) modular chain step by step, and carrying out molecular dynamics simulation until the density of the PEG modular chain achieves a theoretical value; independently arranging a vacuum layer on the upper parts of the obtained three groups of cut models, filling the vacuum layer with the compressed PEG modular chain,and establishing a high polymer bonding compound model corresponding to the cutting model; and carrying out the molecular dynamics simulation on the high polymer bonding compound model. By use of themethod, the interface bonding performance of different crystal surface models can be researched. The method has the advantages of being simple and safe, good in effects and low in cost.
Owner:NANJING UNIV OF SCI & TECH

Hexanitrohexaazaisowurtzitane and nitroguanidine cocrystallized explosive and preparation method thereof

The invention discloses a hexanitrohexaazaisowurtzitane and nitroguanidine cocrystallized explosive and a preparation method thereof. The preparation method comprises the following steps of firstly, adding nitroguanidine in a methanol as a solvent, raising the temperature to 45-55 DEG C, performing stirring for dissolution, and performing filtering to obtain a nitroguanidine saturated solution; keeping the solution at the temperature of 45-55 DEG C, adding hexanitrohexaazaisowurtzitane in the nitroguanidine saturated solution, and performing stirring for dissolution to obtain a hexanitrohexaazaisowurtzitane and nitroguanidine saturated crystallization solution; then keeping the mixed crystallization solution obtain in the last step at the temperature of 40-50 DEG C, performing mixing and stirring for 30-60min, stopping stirring, gradually descending the temperature to the room temperature, performing still standing for 1-2 days, enabling the solvent to volatilize, enabling a crystal nucleus to be formed and grow, precipitating a crystal, and performing filtering and drying to obtain a CL-20/NQ eutectic crystal, wherein the ratio of CL-20 and NQ in the obtained eutectic crystal is 1to 2. For the CL-20/NQ cocrystallized explosive prepared by the preparation method, the thermal behaviors such as melting and decomposition of the explosive are regulated and controlled, effective reduced sensitivity is realized while the obtained cocrystallized explosive keeps relatively high energy density, and the cocrystallized explosive has better application prospect in the field of high-energy insensitive explosive charging.
Owner:XIAN MODERN CHEM RES INST

Preparation method of object and subject explosives with crystal cell embedded hydrogen peroxide molecules

The invention discloses a preparation method of object and subject explosives with crystal cell embedded hydrogen peroxide molecules. The preparation method includes the steps: (1) dissolving urea peroxide raw materials in an organic solvent, closely placing mixture in a low-temperature environment after the materials are sufficiently stirred and dissolved, separating out a urea by-product, and performing filtering to obtain anhydrous hydrogen peroxide filtrate; (2) dissolving HNIW (hexanitrohexaazaisowurtzitane) in a liquid medium to obtain anhydrous HNIW solution after the HNIW are sufficiently stirred and dissolved; (3) mixing the anhydrous hydrogen peroxide filtrate and the anhydrous HNIW solution to obtain mixed solution, enabling the HNIW in the mixed solution to be supersaturated bythe aid of a low-temperature evaporative crystallization technique, and ensuring that water molecules cannot enter a crystallization system; (4) filtering, washing and drying mixed solution after crystals are not separated out to obtain the object and subject explosives with the crystal cells embedded hydrogen peroxide molecules. The method is simple in process, mild in experiment condition and safe to operate, mass preparation is easily implemented, and a new idea is provided for construction of HNIW-based object and subject explosives.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS

Heat-resistant and anti-crystal transition HNIW (hexanitrohexaazaisowurtzitane)-based mixed explosive and preparation method thereof

The invention discloses a heat-resistant and anti-crystal transition HNIW (hexanitrohexaazaisowurtzitane)-based mixed explosive and a preparation method thereof. The preparation method comprises the following steps: A, adding HNIW-based subjective and objective explosives with active molecules embedded into unit cells into a surface modifier solution with strong adhesion performance so as to enable a modifier to self-assemble on the surfaces of crystals to form dense coating layers; B, dissolving an adhesive in a liquid medium, coating and granulating the modified HNIW crystals to prepare modified modelling powder; C, performing compression moulding on the modified modelling powder to obtain the HNIW-based mixed explosive with heat-resistant and anti-crystal transition performance. The mixed explosive prepared by the preparation method provided by the invention comprises the following components in percent by mass: 85-94% of the HNIW-based subjective and objective explosives, 0.5-5% ofthe surface modifier and 4-10% of the adhesive. According to the preparation method, the HNIW subjective and objective explosive crystals are used as raw materials for surface modification, so that the thermal crystal transition temperature of HNIW is increased by about 30 DEG C, and thus the heat resistance thereof is significantly improved.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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