352results about "Pressure gas generation" patented technology

The invention discloses a two-dimensional metal oxide composite reduced graphene oxide burning rate catalyst, which is prepared by the following steps: uniformly grinding glucose, ammonium nitrate and transition metal nitrate, calcining at high temperature to generate a two-dimensional metal oxide nanosheet, mixing the two-dimensional metal oxide nanosheet with surfactant modified reduced graphene oxide powder, and sintering at high temperature to obtain the two-dimensional metal oxide composite reduced graphene oxide burning rate catalyst. And transferring into a high-pressure hydrothermal kettle for solvothermal reaction, so that the reduced graphene oxide and the two-dimensional metal oxide nanosheet are compounded to form the composite burning rate catalyst with a 2D-2D structure. Two two-dimensional materials are compounded through a solvothermal method, the defects of accumulation of reduced graphene oxide and aggregation of the two-dimensional metal oxide due to high surface energy are effectively avoided, meanwhile, the high conductivity of the reduced graphene oxide is utilized, the synergistic catalysis effect of the metal oxide and the carbon material is enhanced, and the performance of the composite material is improved. The composite material has a good catalytic effect on the thermal decomposition process of ammonium perchlorate.

The invention relates to the technical field of energetic materials, in particular to a laser response type high-entropy alloy-based initiating explosive material and a preparation method thereof. The initiating explosive material is mainly formed by uniformly loading a heat-sensitive high-energy compound (such as lead stilbeneate or hexa (4-amino-3, 5-dinitropyrazole) copper) on high-entropy alloy nanoparticles containing five or more metal elements, wherein the heat-sensitive high-energy compound is such as lead stilbeneate or hexa (4-amino-3, 5-dinitropyrazole) copper. The preparation method comprises the following steps: mixing acetylacetone metal salt, a surfactant and a reducing agent in an organic solvent, and stirring and reacting at 180-220 DEG C to prepare high-entropy alloy nanoparticles; the nano particles and a high-energy compound are co-dispersed in a mixed solvent containing a dispersing agent, ultrasonic treatment is carried out to form suspension liquid, and freeze drying is carried out to obtain the nano particles. The method is characterized in that the excellent photo-thermal conversion performance of the high-entropy alloy is utilized, under low laser energy irradiation, a high-energy compound can be effectively excited, and stable detonation of secondary charge CL-20 is successfully achieved. According to the invention, the problems of high response threshold and low output energy of the existing laser initiating explosive material are solved.

Emulsion explosives with gas bubbles that are resistant to in-borehole migration or coalescence are disclosed herein. Such emulsions can be sensitized by mechanically-introducing gas bubbles into the emulsion. Resistance to gas bubble migration and coalescence can be achieved by homogenization, without the need for bubble stabilization agents.

The present invention relates to a composite boron powder and a preparation method thereof. The composite boron powder is prepared by a secondary condensation method using a vinylidene fluoride / propylene alcohol copolymer as a compounding agent, a polyethylene glycol monobutyl ether acrylate / acrylonitrile / allylamine / hydroxyethyl acrylate copolymer as an auxiliary compounding agent, an epoxy resin as a high-strength composite adhesive, and diethylenetriamine as a curing agent. The amounts of the components are based on the mass of the boron powder: the mass of the vinylidene fluoride / propylene alcohol copolymer is 1-2% of the mass of the boron powder, the mass of the polyethylene glycol monobutyl ether acrylate / acrylonitrile / allylamine / hydroxyethyl acrylate copolymer is 0.3-1% of the mass of the boron powder, the mass of the epoxy resin is 2-3% of the mass of the boron powder, and the mass of the diethylenetriamine is 0.15-0.4% of the mass of the boron powder.

The invention provides a temperature-sensitive gas production composition and application thereof in improving the safety performance of a lithium ion battery. When the temperature of the temperature-sensitive gas production composition is lower than 90 DEG C, the temperature-sensitive gas production composition is stable and does not produce any gas; when the temperature-sensitive gas production composition is heated to 100 DEG C or above (such as 100-140 DEG C), the temperature-sensitive gas production composition can produce gas with the volume being 100 times or above of the volume of the temperature-sensitive gas production composition; when the temperature-sensitive gas production structural member is used for the lithium ion battery, the temperature-sensitive gas production structural member is independently packaged and is not in direct contact with an electrolyte in a battery cell, so that the cycle performance of the battery is not influenced; when the thermal runaway temperature of the battery is increased, a large amount of inert gas can be quickly released in the battery cell, the generated pressure enables the pressure release valve to be opened, the safety valve or the aluminum-plastic package to be broken through, flammable organic solvent steam is discharged, heat is taken away, the risks of fire catching and explosion are reduced, and therefore the safety performance of the lithium ion battery is improved.

The invention provides a composite oil phase material for improving water resistance and explosion performance of a porous granular ammonium nitrate fuel oil explosive. The composite oil phase material comprises the following raw materials in parts by mass: 80-100 parts of naphthenic oil, 2-7 parts of an amino-containing dispersant, 1-5 parts of a nanoscale molecular sieve and 0.3-3 parts of an oleate derivative stabilizer. The composite oil phase material can effectively improve the explosion performance and the water resistance of the on-site mixed porous granular ammonium nitrate fuel oil explosive. The raw materials are environment-friendly and easy to obtain, and high popularization value is achieved. The composite oil-phase material provided by the invention is high in flash point and low in condensation point, can replace diesel oil with the grade of minus 40 DEG C to minus 20 DEG C to be applied to preparation of a porous granular ammonium nitrate fuel oil explosive mixed and loaded on site in winter, the intrinsic safety of the explosive production process is improved, and the explosive preparation cost is reduced. The composite oil phase material provided by the invention can also provide good weak alkaline water resistance for the porous granular ammonium nitrate fuel oil explosive.

The invention discloses a low-pressure-index thermoplastic elastomer propellant and a preparation method thereof, and the low-pressure-index thermoplastic elastomer propellant provided by the invention comprises the following components in percentage by mass: 10-15% of a thermoplastic adhesive system; 15-18% of a metal fuel; 65-70% of an oxidant; 0.5-3% of a combustion performance regulator; the thermoplastic adhesive system at least comprises two kinds of thermoplastic elastomers with different melting points. According to the propellant prepared by adopting the adhesive system, the combustion rate pressure index propelled by the thermoplastic elastomer can be remarkably reduced, the combustion efficiency of the propellant is improved, the combustion rate adjusting range of the propellant is widened, and the mechanical property and the processing property of the thermoplastic elastomer propellant can be improved at the same time.

The present invention discloses a copper-containing hydrogen-bond organic framework material, a preparation method, and an application thereof. The method comprises the following steps: mixing trimesic acid, melamine, and a copper salt and dispersing them in a solvent to obtain a mixed suspension; transferring the mixed suspension to a reactor for reaction to obtain a copper-containing hydrogen-bond organic framework material solution; cooling the copper-containing hydrogen-bond organic framework material solution, centrifuging it, and then post-treating the copper-containing hydrogen-bond organic framework material solid obtained by centrifugation to obtain a copper-containing hydrogen-bond organic framework material with a one-dimensional rod-shaped structure. When used in the thermal decomposition catalysis of ammonium perchlorate, the copper-containing hydrogen-bond organic framework material prepared by the present invention can exhibit high catalytic activity and stability, thereby concentrating the exothermic temperature range and heat release of ammonium perchlorate.

The application discloses an energetic material, a preparation method thereof and application of the energetic material as explosives and self-ignition propellants. I C 12 H 12 N 10 or M Ⅱ C8H6N8; wherein, M I is selected from Co, Ni and Cu; M Ⅱ is selected from Zn. The energetic material is convenient to synthesize, has good thermal stability, excellent mechanical sensitivity, excellent propelling performance and specific impulse, has a significant energy density advantage, can effectively solve the problem of continuous evaporation of hydrazine propellants during storage, avoid the risk of internal pressure increase of a fuel tank, and overcome the problems of liquid fuel in the storage and transportation process. Therefore, the innovative high-performance energetic material has excellent performance and wide application potential, and has great commercial value in the fields of aviation, aerospace and military.

The invention belongs to the technical field of solid propellants, and particularly relates to a propellant containing active metal fuel and a preparation method of the propellant. 3.0-4.0% of a plasticizer; 0.3-0.4% of a curing agent; 0.1%-2.0% of a combustion rate regulator; 0.01%-0.5% of a bonding agent; 15-19% of an active metal fuel; 10-18% of a nitramine explosive; the metal fuel is an aluminum-gallium metal alloy, and the aluminum-gallium metal alloy is an aluminum-gallium metal alloy of which the outer layer is coated with an aluminum film. The propellant provided by the invention has the advantage of high combustion efficiency, and can meet the requirement of a solid rocket engine on the high energy performance of the propellant.

The present invention relates to an energetic perfluoroborate binder, a preparation method thereof and an application thereof, belonging to the technical field of energetic binders. The structural formula of the binder is:; wherein, n is a positive integer less than or equal to 20. The main raw materials of the binder are 1H,1H,2H,3H,3H-perfluorononane-1,2-diol, boric acid and polyazidoglycidyl ether; boric acid forms a borate bond with 1H,1H,2H,3H,3H-perfluorononane-1,2-diol, and polyazidoglycidyl ether is compounded through the boron-nitrogen coordination action with 1H,1H,2H,3H,3H-perfluorononane-1,2-diol, realizing the controllable preparation of the energetic perfluoroborate binder. The energetic perfluoroborate binder has high energy and stable storage, and can improve the energy and mechanical properties of the propellant.

The invention relates to the field of preparation of modified double-base propellants, in particular to a preparation process of a modified double-base propellant absorbing drug with uniformly dispersed solid components. The preparation process comprises the following steps: putting the dispersing agent into an absorption kettle according to a feeding sequence, then putting a particle suspension prepared from the white material, the RDX, the aluminum powder and the catalyst into the absorption kettle, and heating, stirring and absorbing in a water medium to obtain absorption slurry. On the basis of a traditional double-base propellant stirring absorption process, a dispersing agent is added to help absorption, the sedimentation problem of a catalyst and RDX in a propellant formula is effectively solved through the effects of electrostatic repulsion and steric hindrance, and an absorption drug with uniformly dispersed solid components is obtained.

The invention discloses application of ferrocenyl conjugated microporous polymers Fc-CMPs in a composite solid propellant and the composite solid propellant, the ferrocenyl conjugated microporous polymers Fc-CMPs are porous organic polymers which take ferrocenyl groups as conjugated functional units and are connected through covalent acetylenic bonds, and the ferrocenyl conjugated microporous polymers Fc-CMPs have excellent thermal stability and permanent porosity, and can be used for preparing the composite solid propellant. The material is solid powder, is insoluble in a traditional organic solvent and does not migrate, and a ferrocene unit serves as a constituent part of a polymer framework and an oxidation-reduction active site and is dispersed in a two-dimensional conjugated network structure of a composite solid propellant. When being used as a burning rate catalyst to be applied to AP decomposition, the ferrocene burning rate catalyst can obviously reduce the high-temperature decomposition peak temperature of AP, and solves the migration problem of a traditional ferrocene burning rate catalyst in a composite solid propellant system. The Fc-CMPs are applied to an AP decomposition catalysis scene for the first time, and a new direction is provided for development of a composite solid propellant burning rate catalyst.

This invention relates to the field of solid propellant technology, specifically disclosing a neutral polymer bonding agent, its preparation method, and its application in solid propellants. The neutral polymer bonding agent is prepared by polymerization of poly(hydroxyalkyl polyacrylate) and cyanoacetic acid as raw materials. It can achieve controllable molecular weight and controllable proportion of functional groups in the polymer. Moreover, the active group -CN in the neutral polymer bonding agent has low steric hindrance and is more easily adsorbed on the surface of ammonium nitrate particles, thereby improving the bonding effect.

The present invention discloses a neutral polymer bonding agent and a method for preparing the same. The bonding agent has a structure as shown in Formula I or Formula II. Furthermore, when the neutral polymer bonding agent has a structure as shown in Formula I, the resulting solid propellant exhibits significantly improved elongation at break. The neutral polymer bonding agent provided herein can be used in an ATPET-GAP curing system, significantly improving the mechanical properties of the solid propellant. #imgabs0#

The invention provides a lead salt modified 5-aminotetrazolyl gas generating agent with low combustion temperature and high combustion rate and a preparation method thereof, the gas generating agent comprises 5-aminotetrazole, strontium nitrate and lead salt, and the mass ratio of the lead salt is 5-10%. According to the invention, the 5-aminotetrazolyl gas generating agent is modified, so that the temperature of the gas generating agent can be reduced, the burning speed can be improved, and the applicability of the gas generating agent as a solid propelling type fire extinguishing device is enhanced.

The invention discloses an Al / polypeptide / AP biological composite energetic material and a preparation method thereof. The biological composite energetic material is of a core-shell structure with Al / polypeptide as a core and AP as a shell. The particle size of the biological composite energetic material is 5-300 [mu] m; the content of the aluminum powder is 20-45% by mass, the polypeptide is 0-5% by mass, the AP is 50-75% by mass, and the content of the polypeptide is not 0%. The invention further provides a preparation method of the Al / polypeptide / AP biological composite energetic material, a cooling recrystallization method is adopted, the self-assembly characteristic of polypeptide molecules is combined, directional arrangement of Al, polypeptide and AP on the nanoscale is achieved, and a uniformly-mixed composite material is formed. The material is stable in structure, the Al powder is not easy to agglomerate, hydroxyl, carboxyl and nitro functional groups in the polypeptide respectively form strong interaction with the Al powder and AP, and the mechanical property, the thermal stability and the reaction activity of the material are remarkably improved. In addition, the preparation process is simple and convenient, the negative influence on the environment is reduced due to the biodegradability of the polypeptide, and the method is suitable for large-scale industrial production.

Provided is a gas-generating agent composition containing components (a) to (c) below, wherein a combustion temperature calculated based on a composition containing the components (a) to (c) below is 1680 K or higher: (a) guanidine nitrate, (b) basic copper nitrate, and (c) melamine cyanurate.

The invention discloses an electrolytic preheating-electrolytic ignition method for a three-electrode hydroxylamine nitrate liquid propellant, and belongs to the field of liquid rocket engines and electrochemistry. Three electrolysis electrodes are arranged in the electrolysis chamber and comprise two positive electrodes and one negative electrode, so that two groups of electrolysis electrode pairs are formed. The method comprises the following steps: injecting a nitric acid hydroxylamine-based liquid propellant into an electrolysis chamber, and electrifying a group of electrolysis electrodes to start electrolysis preheating; after the preset switching time is up, closing the current working electrolysis electrode pair, and switching to another group of non-working electrolysis electrodes to continue electrolysis; and low-voltage and rapid electrolytic ignition is realized. According to the three-electrode electrolysis structure, the time for ignition and reaction to reach the highest temperature can be shortened, and the system response speed is increased; the preheating and ignition voltage can be changed, and the large voltage adjusting and optimizing space is achieved; meanwhile, the electrolytic ignition current is relatively stable, and the instantaneous power consumption is small; and electrolysis power consumption can be saved, electrolysis electrode loss is reduced, and reuse of the electrode is facilitated.

To provide a gas generating agent composition that ignites at a relatively low-temperature phase in which a gas generator does not rupture.SOLUTION: A gas generating agent composition comprises a fuel component and an oxidizing agent component. The gas generating agent composition further comprises, as the fuel component, a compound having a lactone structure and having a melting point or a decomposition point of 90°C or higher but lower than 250°C.SELECTED DRAWING: None

The present invention relates to the technical field of solid propellants, and specifically discloses an organosilane bonding agent, a preparation method thereof, and an application thereof in solid propellants. The organosilane bonding agent is prepared by reacting N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane with acrylonitrile, then adding acrylonitrile to react and performing reduced pressure distillation to remove unreacted small molecule compounds, thereby preparing the organosilane bonding agent. The siloxane in the organosilane bonding agent avoids highly active primary and secondary amine groups, while introducing a cyano group with an inductive effect, which can improve stress concentration under propellant tensile conditions. In addition, multiple hydroxyl groups are introduced into the molecule to participate in the curing reaction. When used in a propellant, it can increase the crosslinking density of the propellant, thereby improving the mechanical properties of the propellant.

The invention relates to a composite solid propellant comprising: - a crosslinked polyurethane binder, which is the reaction product of a polyol polymer and a polyisocyanate crosslinking agent, in the presence of a crosslinking catalyst; - ammonium perchlorate; - optionally aluminum; - optionally a ballistic catalyst; - at least one additive comprising a functionalized organic compound comprising 30 to 50 carbon atoms. Figure for the abstract: Fig. 1.

The invention relates to the technical field of new energy and mining and blasting, in particular to a preparation method of a biomass instantaneous cracking agent. The preparation method comprises the following steps: mixing biomass powder, pulverized coal, an oxidant, a catalyst and a release agent to obtain mixed powder; mixing the adhesive, the water and the preservative to prepare a glue solution; the glue solution and the mixed powder are kneaded, granulated and dried, and the biomass instantaneous cracking agent is obtained, the biomass powder accounts for 4-55 parts by mass, the pulverized coal accounts for 0-48 parts by mass, the oxidizing agent accounts for 0-45 parts by mass, the catalyst accounts for 0-20 parts by mass, the release agent accounts for 0-2.5 parts by mass, the adhesive accounts for 2-10 parts by mass, the preservative accounts for 0-0.15 part by mass, and the oxidizing agent and the catalyst are not 0 at the same time; the oxidizing agent is potassium peraluminate powder and / or ammonium perchlorate powder; the catalyst is potassium nitrate powder and / or sodium nitrate powder. The biomass instantaneous cracking agent prepared by the invention solves the problems of long stone cracking time, low efficiency and environmental pollution of the existing stone cracking agent.

The present invention provides a gas-generating agent composition, a gas-generating agent, and a preparation method and the use, and belongs to the technical field of automobile airbags. The gas-generating agent composition comprises the following components, in percentages by mass: 30-70% of guanidine nitrate, 20-60% of basic copper nitrate, 0-10% of basic copper carbonate, 1-10% of ammonium perchlorate and 1-15% of a slag-forming agent, wherein the slag-forming agent comprises a first component and a second component, the first component being selected from aluminum hydroxide, and the second component being selected from at least one of a zirconate and a silicate. A tablet of the gas-generating agent composition provided above can maintain the form before combustion well after combustion, improve the hardness of residues, and avoid the situation whereby the tablet is molten and splashed after combustion to burn an air bag; and the synergistic effect thereof can reduce the combustion pressure index of the formulation, thereby rendering the combustion more stable.

A stage spacer material suitable for multi-pulse solid rocket engines belongs to the field of energetic materials and contains the following components in percentage by mass: adhesive: 10% to 28%; oxidant: 70% to 85%; curing agent: 1% to 5%; other functional additives: 0% to 3.5%. The novel stage spacer material prepared by the present invention has a linear ablation rate lower than 0.8 mm / s, a mass ablation rate lower than 0.55 g / s, and a thermal conductivity of only about 0.05 W / (m·K). It has good flame insensitivity, high-temperature ablation resistance, and electrical combustion resistance, and has two major advantages: compared with existing inert spacers, this material has higher energy characteristics and can serve as a working fluid; in addition, the electrical combustion characteristic can avoid carrying an igniter, improving the safety performance of the engine system. This technology has broad application prospects in the spacer device of multi-pulse solid rocket engines.

The invention relates to the technical field of gas production materials, and discloses preparation and application of a high-nitrogen energetic gas production material, triazole has high-energy and multi-nitrogen characteristics, nitryl compounds have high energy, and the combination of triazole and nitryl compounds enables the gas production material to have the characteristics of large gas production rate, low-temperature combustion, less harmful gas and the like; the molecular structure contains a large number of N-N, C-N and C = N bonds and has high enthalpy of formation, meanwhile, the content of C and H in the molecule is low, the density of the energetic material can be improved, the electronegativity of nitrogen and oxygen atoms in the structure is high, and the energetic material is a painful energetic material and has high safety in the using process; compared with similar gas production materials, the prepared gas production material has the advantages that the gas production rate is greatly increased, the amount of solid residues is greatly reduced, the added adhesive has no corrosivity, the prepared gas production material is good in fluidity, the external additive can play a role in slagging, and the residues are not prone to being sprayed out.

The invention belongs to the technical field of ammonium perchlorate modification, and particularly relates to a low-sensitivity ammonium perchlorate composite material and a preparation method thereof. The preparation method of the composite material comprises the following steps: (1) mixing diethanol amine and an insensitive material to obtain a coating material; (2) adding a part of ammonium perchlorate into a stirrer according to a sandwich type feeding method, spreading the bottom of the stirrer, adding a coating material, finally adding the rest ammonium perchlorate, lifting a stirrer material cylinder, and starting a stirring reaction when the bottom of a stirring paddle is about to touch the material; and (3) after the reaction is finished, stirring and cooling the reaction system to obtain the ammonium perchlorate composite material with low friction sensitivity and impact sensitivity. The process provided by the invention is suitable for preparing low-sensitivity ammonium perchlorate with various particle sizes, has the advantages of simple process flow, good reproducibility, easiness in amplification and almost no pollution to the environment, and does not influence the performance of ammonium perchlorate while reducing the sensitivity of ammonium perchlorate.

The invention belongs to the technical field of chemical engineering, and relates to a composition for a detonation sound agent, the detonation sound agent and a preparation method and application of the detonation sound agent. The technical problems that in the prior art, pyrotechnic composition and aluminum magnesium alloy powder serve as raw materials, potential safety hazards exist in the preparation and storage process, sulfur dioxide generated after combustion easily forms acid rain, and the detonation sound value does not reach the standard are solved. The invention provides a composition for a detonation sound agent, which comprises the following raw materials: 75-85 wt% of lead tetraoxide, 10-15 wt% of aluminum-silicon alloy powder and 5-10 wt% of nitrocellulose gum solution, and has the effects of high detonation sound value, high stability and safety, and suitability for large-scale industrial production and use. The invention further provides a detonation sound agent and a preparation method of the detonation sound agent. Meanwhile, the invention further provides application of the detonation sound agent in preparation of the bird repelling bomb, when the explosive quantity is 300 mg, the set-off sound level value at the position 2 m away from the acting position can reach 120 dB or above, and the good high-altitude bird repelling effect is achieved.

The invention discloses a low-combustion-temperature oxygen-deficient high-pressure-index rich-combustion fuel gas generating agent which comprises the following components in percentage by mass: 50-70% of an oxidizing agent; 12%-30% of hydrocarbon solid fuel; 0-2.5% of a combustion rate regulator; 9%-17% of an adhesive; 0-3.5% of a plasticizer; and 0.7-1.3% of a curing agent. The invention also discloses a preparation method of the fuel gas generating agent. According to the low-combustion-temperature oxygen-poor type high-pressure-index rich-combustion gas generating agent, the gas temperature ranges from 1100 K to 1600 K, the pressure index ranges from 0.5 to 0.8, the oxygen coefficient ranges from 0.3 to 0.45, the total molar ratio of rich-combustion gas ranges from 60% to 84.8%, rich-combustion gas is provided for a rotary detonation engine, and a power source is provided for a solid attitude and orbit control engine.

This invention provides a three-layer composite fuel consisting of boron-supported elemental metal and metal oxide, and its preparation method. The middle layer is an elemental Mo layer, and the surface layer is a dense NbOx or TiO2 thin film oxide layer. The NbOx or TiO2 thin film oxide layer can completely cover the elemental Mo layer. This invention uses atomic layer deposition (ALD) to deposit elemental Mo on the surface of boron particles to prepare a B@Mo composite material. To prevent oxidation of the surface Mo, an in-situ preparation method is used to deposit a dense NbOx or TiO2 thin film of a certain thickness on the Mo film surface via ALD. This NbOx and TiO2 film effectively isolates oxygen from the air, effectively preventing the oxidation of the Mo film. In the composite fuel, elemental Mo not only improves the combustion efficiency of boron particles but also effectively increases the heat release of the composite fuel. The NbOx and TiO2 films not only isolate oxygen but also have a catalytic effect, significantly improving the combustion performance of the composite fuel.