376results about "Non-explosive/non-thermic compositions" patented technology

The invention discloses an integrated oil phase emulsion explosive and a preparation method thereof. The emulsion explosive is prepared from the following raw materials: a water-phase component, an oil-phase component and an emulsifier for emulsifying the water-phase component and the oil-phase component, wherein the water-phase component contains a modified oxidant formed by loading a nitrate oxidant component on p-aminophenyl POSS (Polyhedral Oligomeric Silsesquioxane); the preparation process of the modified oxidizing agent comprises the following steps: A, fully dispersing a nitrate oxidizing agent component and p-aminophenyl POSS in an aqueous solution, so that the nitrate oxidizing agent component is fully attached to the p-aminophenyl POSS; and B, separating a solid-phase component, namely the modified oxidant, from the solution system obtained in the step B. According to the integrated oil phase emulsion explosive and the preparation method thereof provided by the invention, the sensitivity and the power can be well considered.

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 discloses an on-site mixed water-gel explosive which comprises the following components in percentage by weight: 45-70% of ammonium nitrate; 9%-15% of water; 10-20% of calcium nitrate; 7-20% of liquid fuel; 0-10% of an auxiliary combustible agent; 0.7%-1.0% of a gelling agent; 0.2%-0.5% of an additive; 0.02%-8% of a sensitizing agent; 1-3% of a cross-linking agent; the density range of the explosive is 0.3-1.25 g / cm < 3 >, and the adjusting range is wide; the detonation velocity of the explosive is 2000-4500 m / s, and the explosive is high in matching degree with medium soft rock; the explosive has good water resistance and is suitable for charging of wet holes, water holes and slurry holes; the production raw materials of the explosive do not contain high-energy materials, and the prepared thickening mother liquor and semi-finished products have the characteristics of good stability, long storage life, high transportation safety and high intrinsic safety.

A system / apparatus including: at least one control system or control unit configured for changing a concentration / flow rate of a set of sensitizing agents for an explosive composition, wherein the sensitizing agents are introduced at or into at least one portion of an explosive composition loading system or apparatus in a manner that facilitates or enables generation of two or more explosive compositions having at least one density profile / distribution, wherein the changing of the concentration / flow rate provides the sensitizing agents with a concentration profile / distribution within and along a conduit / hose during flow of the explosive compositions toward and prior to the explosive compositions reaching a distal portion of the conduit / hose that is fluidically coupled to an outlet structure, wherein the concentration profile / distribution corresponds to the density profile / distribution.

A composite oil phase and composite emulsion matrix for site-mixed emulsion explosive and preparation methods therefor. The composite oil phase is divided into material A and material B, wherein in the material A, a high-viscosity polyisobutylene maleic anhydride amine esterification derivative is used as a primary emulsifier to increase the strength and thickness of an emulsification film of an emulsion matrix, thereby improving the stability of the emulsion matrix; in the material B, a low-viscosity polyisobutylene maleic anhydride amine esterification derivative and SP-80 are used as primary emulsifiers to regulate the ammonium nitrate dissolution rate of the emulsion matrix, thereby improving the sensitization characteristic of the emulsion matrix; and the emulsion matrix prepared from two composite oil phases can effectively improve the water resistance of the emulsion matrix while the problems of high-temperature over-sensitization and low-temperature insensitivity are solved, so that the explosion quality is guaranteed.

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 invention discloses a colloidal emulsion explosive with high storage stability and a preparation method thereof. The raw materials for preparing the emulsion explosive comprise ammonium nitrate, calcium nitrate, water, a compound emulsifier, compound wax and a special foaming agent. Wherein the composite emulsifier is a modified span-80 composite emulsifier obtained by carrying out esterification reaction on an anionic carboxylate emulsifier and multiple hydroxyl sites of span-80, and the composite emulsifier has high molecular weight, so that the space volume of a lipophilic group is increased, and an interfacial film is tighter; the special foaming agent is composed of sodium nitrite, zinc nitrate, gelatin peptone, Tween 80, phosphoric acid, urea and water, the gelatin peptone is a green pure natural raw material, the surface tension of an emulsion matrix is effectively reduced, the contact area of the foaming agent and the emulsion matrix is increased, the foaming efficiency is catalyzed by zinc nitrate, and bubbles are good in stability and not prone to escaping due to Tween 80. The use of the compound emulsifier and the special foaming agent improves the blasting performance and storage stability of the emulsion explosive.

The invention provides a modified epoxy resin energetic adhesive composition. The composition comprises the following components: an epoxy resin matrix and a curing agent, the curing agent is a first curing agent or a curing agent combination A with the number-average molecular weight not greater than 400g / mol; the curing agent composition A is a composition of any one of an alicyclic amine curing agent, an aromatic amine curing agent and a first curing agent with the number-average molecular weight of not more than 400g / mol and a second curing agent with the number-average molecular weight of not less than 600g / mol; in the composition, the mass ratio of the epoxy resin matrix to the curing agent based on the active hydrogen equivalent is 1: (0.3-0.75). The modified epoxy resin energetic adhesive prepared from the composition provided by the invention has the characteristics of good adhesive property, high structural strength, high combustion rate, sufficient combustion reaction and the like.

The invention provides a preparation method of modified nano silicon powder wrapped by a polymer, which comprises the following steps: dissolving a polymer PVDF (Polyvinylidene Fluoride) in an organic solvent N-dimethylformamide DMF (Dimethyl Formamide), carrying out ultrasonic treatment, adding Si powder, adding the Si powder in three times, and then carrying out magnetic stirring, so that nano metal powder and a polymer solution are fully mixed; the preparation method comprises the following steps: adding an energetic oxidant AP into a polymer solution containing nano Si powder according to a mass ratio of PVDF / AP of 1: 3, magnetically stirring, and carrying out ultrasonic treatment to obtain a precursor solution PVDF / AP / Si; and relevant parameters are set, and the coated and modified shell-core type nano composite metal powder is prepared through a spray granulation method. According to the invention, the yield of the silicon-based compound can be improved, the energy and combustion performance of the compound are improved, and the cost of coating silicon powder is effectively reduced. In addition, the PVDF, the AP and the silicon powder are wrapped according to the optimal proportion, so that the energy release efficiency of the compound Si-coated PVDF / AP reaches the maximum.

The invention discloses a multifunctional polyamide type solid propellant slurry viscosity reduction auxiliary agent and a preparation method, and belongs to the field of viscosity reduction auxiliary agents, dimer acid and a polyamine compound are subjected to a condensation reaction at 135-150 DEG C, and a polyamide prepolymer is generated in obtained reaction liquid; and cooling the reaction liquid, adding a solvent, uniformly mixing, adding a vinyl monomer at 45-60 DEG C, reacting, and finally cooling to room temperature to obtain the multifunctional polyamide type solid propellant slurry viscosity-reducing auxiliary agent. According to the present invention, the use amounts of the dimer acid, the polyamine compound and the vinyl monomer are respectively 47-67%, 18-44% and 9-25% by mass, such that the fluidity and the viscosity in the propellant slurry can be effectively improved, and the mechanical strength of the cured product can be improved;

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 discloses a boron-based delay powder and preparation thereof, and the boron-based delay powder taking attapulgite powder as one of raw materials is high in delay precision and good in thermal stability.

The invention provides an MXene-based binder, a tungsten-based delay powder and a preparation method, and the preparation method of the MXene-based binder specifically comprises the following steps: mixing a vinyl chloride-vinyl acetate resin solution, a polyvinylidene fluoride-hexafluoropropylene solution and an MXene suspension to obtain a mixed solution; and adding a plasticizer into the mixed solution, stirring, drying, freezing and crushing to obtain the Mxene-based binder. The preparation method of the binder system is simple, large-scale production is facilitated, and the binder system is stable in combustion, high in combustion efficiency, good in mechanical property and low in gas yield when applied to the tungsten delay powder.

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 high-explosion-heat insensitive environment-friendly firework propellant and a preparation method thereof, and belongs to the technical field of fireworks and crackers. Based on a thermal radiation principle, superfine metal powder with a high combustion heat value is selected as a combustible agent, high-molecular fluoride is used as an oxidizing agent, and a high-energy insensitive energetic material 3-nitro-1, 2, 4-triazole-5-ketone (NTO) is introduced to obtain the firework propellant. Wherein the high-molecular fluoride and the superfine active metal powder have good reactivity, and flame generated by the high-molecular fluoride and the superfine active metal powder contains solid and liquid scorching particle emitters, so that the flame is brighter in the combustion process of the fireworks and crackers; and by adding the high-energy insensitive energetic material NTO, the explosion heat and the throwing height of the firework propellant powder are improved. Compared with a traditional firework propellant formula, the obtained product has the advantages of being non-toxic, harmless, safe and environmentally friendly, and has good application value in the field of fireworks and crackers.

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 invention relates to the technical field of thermal expansion microcapsules, in particular to a pressure-resistant thermal expansion microcapsule and a preparation method thereof.The preparation method comprises the following steps that 1, a dispersion medium, inorganic salt, a dispersion stabilizer and a dispersion stabilizing additive are mixed, and a water phase is obtained; 2) mixing a monomer, an initiator, a cross-linking agent and a foaming agent to obtain an oil phase; 3) uniformly stirring the oil phase and the water phase to obtain a suspension; and 4) carrying out polymerization reaction on the obtained suspension in an inert atmosphere at 40-80 DEG C under the pressure of 0.01-1 MPa for 10-25 hours, filtering and drying to obtain the pressure-resistant thermal expansion microcapsule.

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 present invention provides a method for improving the slow-baking heat resistance of explosives based on an energetic negative burning rate catalyst, the method adopts ZIF-90 as an energetic negative burning rate catalyst, the explosive includes LLM-105 elemental explosive, and the slow-baking heat resistance of explosives is improved by regulating the burning rate of explosives by the negative burning rate catalyst. In the present invention, a 5% mass fraction of ZIF-90 can produce a relatively excellent negative catalytic effect on the LLM-105 energetic material, so that the thermal decomposition temperature of LLM-105 is lagged by 6.4°C. In order to verify the universality of this energetic negative burning rate catalyst, after adding a 5% mass fraction of ZIF-90 to an LLM-105-based explosive column, the heat-resistant insensitive characteristics of the explosive column can be significantly improved, so that the heat-resistant time of the LLM-105-based explosive column is increased by more than 1 times compared with before.

The embodiment of the present application provides a kind of spherical dihydroxy glyoxime and its preparation method and energetic material.The method comprises the following steps: hydrochloric acid solution and dihydroxy glyoxime metal salt suspension are simultaneously added into reaction bottom liquid containing regulator, crystallization reaction is carried out, and crystal suspension is obtained;The crystal suspension is filtered, and the spherical dihydroxy glyoxime is obtained.The method is used to achieve the effect of providing the flowability and bulk density of spherical dihydroxy glyoxime.

The invention discloses a powdery emulsion explosive with eutectic inorganic salt as an internal phase and a preparation method, and relates to the technical field of powdery emulsion explosives, the powdery emulsion explosive comprises the following raw materials by weight: 90-110 parts of eutectic inorganic salt and 5-7 parts of a composite oil phase; wherein the eutectic inorganic salt is prepared by recrystallizing ammonium nitrate and sodium chloride. Ammonium nitrate and sodium chloride are combined in a recrystallization manner, so that sodium chloride is uniformly distributed in ammonium nitrate crystals in a lattice doping manner, a molecular-level dispersion effect is realized, and the flame inhibitor is more uniformly dispersed in an inner phase; secondly, the eutectic inorganic salt has a synergistic decomposition peak at 210-240 DEG C, and chloride ions are released in advance to interact with active groups generated by explosion; under the combined action of the two factors, sodium chloride is used as a flame inhibitor to play a role more effectively at the flame front, the flame temperature is reduced, and flame propagation is inhibited.

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.

The invention discloses a high-activity energetic microsphere containing nano boron powder and ETN and a preparation method of the high-activity energetic microsphere, and belongs to the field of explosives. The microspheres are formed by uniformly mixing nano boron powder, ETN and NC, NC serves as an adhesive to enable the mixture to be in a microsphere shape, and ETN serves as a plasticizer of NC to improve the physical performance and energy release efficiency of the microspheres. Wherein ETN serving as a plasticizer of NC and NC can be decomposed and release high-temperature oxygen before nB is ignited, and nB is preheated and activated, so that the ignition temperature of nB is lower than 500 DEG C, and the combustion rate of nB is 1000 times that of micron boron. The preparation method of the high-activity energetic microspheres containing nano boron powder and ETN comprises the following steps: chemically modifying by using a silane coupling agent, combining PEG and nB, forming by using a microfluidic O / W emulsion method, and controlling parameters such as pH and flow velocity to prepare the microspheres with high sphericity and uniform dispersion.

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 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 present invention provides safe, environmentally friendly compositions and efficient methods for initiating explosions. More specifically, the present invention provides microorganism-derived compositions for emulsion explosives, which can also be used to stabilize emulsion explosive compositions.

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.

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 application provides a kind of propellant grain automatic coating equipment, including automatic coating assembly and drying box arranged at one side of automatic coating assembly;Automatic coating assembly includes workbench and three-axis linkage structure arranged on workbench, three-axis linkage structure is equipped with clamping structure for clamping propellant grain, first opening and second opening are opened on the table top of workbench, propellant grain soaking structure is arranged on the side away from the table top of first opening, propellant grain turnover structure is arranged on the side away from the table top of second opening, propellant grain turnover structure is used to change the position of clamping structure clamping propellant grain in cooperation with clamping structure;The upper end surface of drying box is provided with third opening, and the third opening is provided with detachable jig tray, the jig tray is used to collect coated propellant grain, and the inside of drying box is provided with drying equipment.The technical problem that the existing technology adopts manual coating propellant grain, resulting in low reliability of charging work and great safety risk is solved.