24results about How to "Avoid pyrolysis" patented technology

The invention provides a method for preparing active copper oxide by recycling ammonia and carbon. The method comprises the following steps: step 1, preparing a copper dissolving reagent from ammonia water and carbon dioxide; 2, the copper raw material and a copper dissolving reagent are mixed, oxygen or air is introduced, heating and pressurizing are carried out for an ammonia leaching complexing reaction, and a copper ammonia complex is obtained; step 3, after the copper ammonia complex is filtered, rectifying to remove ammonia and carbon, producing ammonia gas and carbon dioxide at the tower top, and producing basic cupric carbonate slurry at the tower kettle; 4, centrifuging and drying the basic cupric carbonate slurry to obtain a basic cupric carbonate solid; and 5, calcining the basic cupric carbonate solid at high temperature to produce active copper oxide. According to the active copper oxide preparation method capable of recycling ammonia and carbon, the active copper oxide with high purity and uniform particle size can be directly prepared.

The invention relates to the technical field of hydrophobic flame-retardant materials, and discloses a method for preparing a super-hydrophobic flame-retardant flexible material from a water-dispersed nanocellulose compound, which comprises the following steps: preparing a nanocellulose suspension; synthesizing silicon dioxide nanoparticles; preparation of a precursor suspension: mixing SiO2 nanoparticles, methyltrimethoxysilane and the nanocellulose suspension in proportion, and carrying out a reaction to obtain the precursor suspension; preparing a polyvinyl alcohol solution; preparing a water-dispersible plant nano cellulose compound mixed solution, and freezing the water-dispersible plant nano cellulose compound mixed solution; and carrying out freeze drying treatment and heat treatment on the frozen material to obtain the super-hydrophobic flame-retardant flexible material. According to the method for preparing the super-hydrophobic flame-retardant flexible material by adopting the water dispersible nano-cellulose compound, the material preparation process is green and pollution-free, and the prepared flexible material has the characteristics of high elasticity, high oil absorbency, reusability, fire resistance, degradability and the like, and can be applied to various fields.

The invention relates to the technical field of cement material preparation, and particularly discloses a calcium aluminoferrite-calcium sulphosilicate cement-based expanding agent as well as a preparation method and application thereof. The expanding agent comprises expansion source powder, gypsum powder and a regulating agent. The expansion source powder is prepared from 45 to 55 weight percent of calcium aluminoferrite, 30 to 40 weight percent of calcium sulphosilicate, 5 to 10 weight percent of calcium sulphoaluminate, 5 to 10 weight percent of dicalcium silicate and 2 to 4 weight percent of calcium sulfate; the balance is inevitable impurity mineral phases; the calcium aluminoferrite comprises dicalcium ferrite, hexacalcium dialuminoferrite, tetracalcium aluminoferrite and hexacalcium dialuminoferrite. The gypsum powder accounts for 12-18% of the mass of the expansion source powder; the regulating agent is triethanolamine or propanolamine, and the mass of the regulating agent is 0.1-0.5% of the total mass of the expansion source powder and the gypsum powder. The expanding agent provided by the invention has no interference on the flowability of concrete, can provide continuous and coherent expansion for the whole hydration hardening stage of a cement-based cementing material, and has long-term stable expansion performance.

The invention discloses liquid hydrocarbon fuel combustion equipment and a supercritical carbon dioxide circulation system, the liquid hydrocarbon fuel combustion equipment comprises a nozzle, a combustion chamber and a rotational flow assembly, the rotational flow assembly comprises a first-stage pipe, a second-stage pipe, a first-stage cyclone, a second-stage cyclone and a third-stage cyclone, and the first-stage pipe and the second-stage pipe are both scaling venturi pipes. The supercritical carbon dioxide circulation system comprises fuel supply equipment, pure oxygen supply equipment and a circulation assembly, mixed gas of carbon dioxide and water vapor generated by combustion of the liquid hydrocarbon fuel combustion equipment is circulated through the circulation assembly to obtain high-purity carbon dioxide, and the high-purity carbon dioxide is divided into three paths to flow into a first-stage swirler, a second-stage swirler and a third-stage swirler; the carbon dioxide flowing into the second-stage cyclone is uniformly mixed with oxygen from pure oxygen supply equipment before flowing into the second-stage cyclone. The combustion ignition delay period and the mixing time can be prolonged, a standing vortex high-temperature rapid reaction area is formed, the problem that the combustion speed is low in the concentrated carbon dioxide atmosphere is solved, and the supercritical carbon dioxide circulation efficiency is improved.

The invention relates to the technical field of hydrogen peroxide supply, in particular to an extrusion type hydrogen peroxide supply system for a long-time test, which comprises a hydrogen peroxide supply unit, an extrusion unit, a pneumatic control unit and a blowdown unit, comprising a hydrogen peroxide storage tank I and a hydrogen peroxide storage tank II, liquid outlet pipelines at the bottoms of the hydrogen peroxide storage tank I and the hydrogen peroxide storage tank II are jointly communicated with a converging pipeline communicated with a hydrogen peroxide outlet, and the extrusion unit is used for providing extrusion gas for the hydrogen peroxide supply unit. The device is formed by connecting a plurality of storage tanks with relatively small volumes in parallel, liquid is supplied in sequence, the long-time test requirement is met, the extrusion type system extrudes dangerous liquid through inert gas, operation is safe, the structure is simple, the situation that test resources are wasted during short-time test is avoided, the hydrogen peroxide supply problem of long-time test is effectively solved, and the test efficiency is improved. And the safety in the liquid supply process is improved.

The invention belongs to the technical field of modified xanthan gum, and provides high-temperature-resistant xanthan gum and a preparation method thereof. The xanthan gum is subjected to chemical crosslinking and graft polymer joint modification, so that covalent bond combination among molecules can be enhanced, the rigidity of a molecular chain is increased, the structural integrity of the material is improved, and the high-temperature resistance of the xanthan gum is remarkably improved; by introducing the inorganic nano-material modified by polar groups and chemical vapor deposition, the heat resistance of the xanthan gum is improved, and the structural stability of the xanthan gum at high temperature is also improved. In addition, due to the addition of the high-temperature-resistant polymer, especially the polymer subjected to ultraviolet irradiation and amino modification, the high-temperature resistance of the material is further enhanced. The heat resistance of the xanthan gum is effectively improved, so that the xanthan gum shows excellent performance stability in a high-temperature environment, and more industrial application requirements are met.

The invention relates to a manufacturing process of a PU square carpet, and belongs to the technical field of flame-retardant carpets. The manufacturing process comprises the following steps: firstly, preparing a flame-retardant ultraviolet absorbent, mixing the ultraviolet absorbent with nylon slices, carrying out melt spinning, then preparing a carpet surface blank layer by using the flame-retardant nylon yarns, and finally, carrying out thermocuring treatment at different temperatures to solve the warping problem in the carpet manufacturing process. The finally prepared carpet has good ultraviolet ray absorption capability and flame retardant capability; the flame-retardant ultraviolet absorbent used in the PU square carpet manufacturing process has good ultraviolet absorption capacity and good stability and is insoluble in water, so that the flame-retardant ultraviolet absorbent can take effect for a long time, and the effect cannot be weakened due to maintenance and cleaning; besides, environment-friendly materials which are nontoxic and harmless to human bodies are adopted in the preparation process of the PU square carpet, internal flame-retardant components cannot volatilize, harmful gas is not generated during combustion, and the PU square carpet is harmless to the human bodies.

This invention discloses a low-corrosion chloride molten salt heat transfer and storage medium, method, and application, belonging to the field of molten salt thermal storage technology. The high-heat-capacity, low-corrosion carbonate molten salt heat transfer and storage medium of this invention is composed of 18%~22% potassium chloride, 6%~10% sodium chloride, 1%~3% aluminum powder, 1%~3% magnesium powder, 1%~3% zinc powder, with the remainder being zinc chloride. Its key feature is the introduction of metal powder into the molten salt, which not only achieves excellent thermal storage performance at 600℃~800℃, but also reduces corrosion by utilizing the potential regulation ability of dissolved metal ions and the formation of highly active [Al] from gaseous chloride products through physical and chemical adsorption. This low-corrosion chloride molten salt heat transfer and storage medium achieves excellent thermal storage performance and low corrosivity, and can be applied in solar thermal power generation and molten salt energy storage.

The utility model provides an emulsifier adding device for emulsion explosive production, and belongs to the technical field of emulsion explosives. Comprising a base, an adding barrel is fixed to the base, a feeding pipe and a discharging pipe are installed at one end of the adding barrel, an air cylinder is fixed to the other end of the adding barrel, and a crankshaft of the air cylinder extends into the adding barrel and is connected with a piston; the feeding pipe and the discharging pipe extend into the base, the outer side of a port, extending into the base, of the feeding pipe is movably connected with a first membrane flap, the first membrane flap only allows a medium to be output from the port of the feeding pipe, the inner side of a port, extending into the base, of the discharging pipe is movably connected with a second membrane flap, and the second membrane flap only allows the medium to be output from the port of the discharging pipe. And the second membrane flap only allows the medium to be input into the port of the discharge pipe. According to the utility model, the emulsifier can be quantitatively added, the molecular chain of the emulsifier can be prevented from being damaged, the activity of the emulsifier is ensured, and the quality of the final emulsion matrix is further ensured.

The utility model discloses a lubricating oil filtering and recycling device which comprises a filtering hopper and a reduced pressure distillation bin, the filtering hopper is arranged at the upper end of the side portion of the reduced pressure distillation bin, a feeding pipe is connected between the lower end of the filtering hopper and the upper end of the side portion of the reduced pressure distillation bin, and an electric valve is arranged in the feeding pipe. A frame is arranged at the upper end of the interior of the filter hopper, a filter screen is arranged between the lower ends of the frame, clamping blocks are arranged at the two ends of the upper portion of the filter hopper, clamping grooves are formed in the two ends of the frame, the clamping blocks are connected with the clamping grooves in a clamped mode, handles are hinged to the two ends of the frame, and an evaporator is arranged at the bottom of the reduced pressure distillation bin. A supporting cover is arranged on the side portion of the reduced pressure distillation bin, and a vacuum pump is arranged in the supporting cover. According to the utility model, filtered impurities are easy to clean, and the recovery effect is good.

The invention provides a high-temperature-resistant electrolyte for a lithium-manganese battery and a preparation method and application of the high-temperature-resistant electrolyte, and belongs to the technical field of battery electrolytes.The high-temperature-resistant electrolyte comprises lithium salt, an organic solvent, a high-temperature-resistant additive and a flame retardant, and the high-temperature-resistant additive is polydimethylsiloxane, hexamethyldisilazane, fluoroethylene carbonate and 1, 2-propylene glycol; and one or more of 1, 3-propane sultone. Aiming at the defects of the existing electrolyte, the invention develops the electrolyte with high thermal stability and strong compatibility with the lithium elementary substance, and the electrolyte can still keep stable performance under the condition of long-time storage at 80 DEG C, and has good performance on parameters such as differential pressure, internal resistance after storage, electrolyte loss rate after storage and the like. The decomposition of the electrolyte under a high-temperature condition is reduced, the electrolyte is better matched with the system characteristics and the use environment of the lithium-manganese battery, and the application range and field of the lithium-manganese battery are widened.

The invention discloses a heat insulation polytetrafluoroethylene composition for a missile electronic cabin cover, which adopts modified porous SiO2 as a functional filler, constructs a reversible solid-liquid phase change heat absorption system in a polytetrafluoroethylene matrix, and actively intercepts and stores intrusion heat through phase change latent heat, thereby significantly delaying the temperature rise of the back of the cabin cover; meanwhile, perfluoropolyether phosphate is introduced, so that the interface bonding between the filler and a matrix is greatly improved. The two components cooperate with each other, so that the composite material keeps the inherent low dielectric property and high mechanical strength of polytetrafluoroethylene while obtaining excellent dynamic heat insulation performance, and unification of wave transmission, heat insulation and bearing functions is realized. In addition, the process is completely compatible with an existing polytetrafluoroethylene mold pressing-sintering production line, equipment investment and energy consumption are reduced, and an efficient and low-cost technical path is provided for industrial preparation of the high-performance missile electronic cabin cover.

The utility model discloses a kind of equipment for ruthenium trichloride drying, belong to ruthenium trichloride processing equipment technical field. Including sandwich kettle body, temperature control heater, nitrogen purging unit, cryogenic trapping unit and discharge unit, the kettle cover is provided at the top of the sandwich kettle body, and the inside of the sandwich kettle body is rotationally provided with dispersion paddle;The dispersion paddle is connected with the stirring motor of kettle cover top;The bottom of the sandwich kettle body is provided with gate valve;Temperature control heater is set in the sandwich inside of sandwich kettle body;Nitrogen purging pipeline is installed on the inside upper portion of the inner bag of the sandwich kettle body;The nitrogen purging pipeline is connected to nitrogen pressure gas source;The cryogenic trapping unit includes the exhaust pipe connected with the inside upper portion of the inner bag of sandwich kettle body, and the exhaust pipe is connected to exhaust pump;The equipment for ruthenium trichloride drying of the utility model can ensure the drying quality of ruthenium trichloride, and can avoid material loss and cause surrounding environmental pollution.

The invention relates to a fluxing agent for beta-Ga2O3 crystal growth and a crystal growth method. According to the invention, LiBO2-metal fluoride is used as a composite fluxing agent system for growth of beta-Ga2O3 crystals, the molar ratio of LiBO2 to metal fluoride is (1-0.8): (0.04-0.2), and the growth temperature interval of the crystals is 700-1000 DEG C. Compared with the prior art, the fluxing agent system provided by the invention does not contain toxic and harmful components such as PbO, PbSO4 and the like which are commonly used in a high-temperature fluxing agent, the saturation point temperature of the beta-Ga2O3 crystal can be greatly reduced, the stability of a growth system is improved, the B-O bond chain can be effectively broken by the metal fluoride, the solvent viscosity is small, the inclusion is prevented from being generated, and the service life of the fluxing agent system is prolonged. And the high-quality beta-Ga2O3 crystal is easy to obtain.

The invention relates to the technical field of films, in particular to a degradable heat shrinkage film and a preparation method thereof. The degradable thermal shrinkage film comprises an upper-layer film, a middle-layer film and a lower-layer film, the upper-layer film and the lower-layer film comprise one or more of LDPE, MLLDPE and HDPE, and the middle-layer film comprises 80-90 parts of degradable master batch and 10-20 parts of corn starch modifier; the corn starch modifier comprises corn starch, polyvinyl alcohol, vegetable protein fibers and a natural polymer; the degradable master batch comprises polyethylene powder, peroxide, metal salt and a stabilizer. Compared with an existing heat shrinkage film and an existing degradable film, the degradable heat shrinkage film has more excellent environment-friendly performance, higher degradability and more balanced mechanical performance, through the synergistic effect of biodegradation of the corn starch modifier and chemical degradation of the degradable master batch, the excellent performance of the heat shrinkage film can be kept, and the degradable heat shrinkage film has the advantages of being environmentally friendly and capable of being widely applied. And the material can be quickly degraded after being used, so that the burden on the environment is reduced.

The invention relates to the technical field of electrical contact materials, in particular to a SnO2 electrical contact material for a new energy electrical appliance and a preparation method of the SnO2 electrical contact material. The SnO2 electrical contact material comprises 8-15% of tin oxide, 0.5-3% of a composite additive, 0.1-2% of an accelerant and the balance of silver. According to the invention, yttrium ions and chromium ions can be partially dissolved in tin oxide crystal lattices, so that the thermal decomposition reaction of tin oxide at extremely high arc temperature is effectively inhibited, the material loss caused by tin element volatilization is reduced, the second additive generates a high-melting-point composite oxide phase after high-temperature calcination, and the high-melting-point composite oxide phase is uniformly distributed in a silver matrix; as a physical skeleton for resisting arc erosion, the accelerant mainly plays a role in dispersing and interface optimizing, and an interface compound containing zinc, lanthanum, boron and oxygen is formed after the accelerant is calcined, so that the wettability and binding force between tin oxide particles and a silver matrix are improved, uniform distribution of the tin oxide particles is ensured, local overheating and concentrated erosion are avoided, and the service life of the tin oxide particles is prolonged. Therefore, the mass loss of arc ablation is obviously reduced.

The invention discloses a double-sided metal polarity III-group nitride material epitaxy method and device, and belongs to the technical field of semiconductors. According to the method, after the N polar surface of the III-group nitride material substrate is subjected to oxygen treatment, the AlN is deposited through PVD, oxygen can be introduced in the deposition process, and high-quality metal polar AlN is obtained on the N polar surface; and then in-situ high-temperature low-pressure nitrogen treatment is carried out on the PVD-AlN, so that the quality of the PVD-AlN layer is improved, impurities on a growth interface are reduced, an N vacancy is filled, and high-temperature decomposition of the PVD-AlN layer is inhibited, thereby improving the crystal quality and the electrical property of a subsequently grown III-group nitride material. By fully utilizing the two metal polar surfaces of the front surface and the back surface, high-performance III-nitride devices with metal polarity can be prepared on the two surfaces respectively, the integration level of the devices is improved, the cost is reduced, and the III-nitride devices with full-vertical structures can be prepared by developing processes on the two surfaces respectively.

This invention discloses a polylactic acid (PLA) filled with seaweed fiber and its preparation method. The PLA filled with seaweed fiber is prepared by weight-based methods using 100 parts PLA, 20-100 parts seaweed fiber, 1-5 parts zinc borate, 0.5-5 parts γ-aminopropylsilanetriol, 0.5-3 parts antioxidant, and 0.1-3 parts lubricant. This invention introduces zinc borate and γ-aminopropylsilanetriol into the PLA filled with seaweed fiber, thereby significantly improving the mechanical and flame-retardant properties of PLA, providing prospects for the application of PLA materials in more fields.

The invention relates to the technical field of peanut oil production, and discloses a low-temperature peanut oil filtering assembly. The filtering tank is mounted on the supporting frame through a first supporting column and a second fixing frame; the conveying mechanism is mounted on one side of the filtering tank and is used for conveying peanut oil; the impurity discharging mechanism is mounted on the filtering tank; and the impurity discharging mechanism comprises a rotating rod and a first fixing frame, the outer wall of the rotating rod is rotationally connected to the interior of the filtering tank, a scraping plate is fixedly connected to the outer wall of the rotating rod, and the outer wall of the scraping plate is slidably connected to the inner wall of the filtering tank. A first gear is driven to rotate through rotation of a second gear, then a transmission rod is driven to rotate in a connecting box, then a rotating rod is driven to rotate in a filtering tank, a scraping plate is driven to move in the filtering tank through rotation of the rotating rod, and a filter screen is arranged on the scraping plate; and the impurities are pushed to move through the scraping plate so as to be discharged.

The present invention relates to the field of film technology, and specifically to a degradable heat shrinkable film and a preparation method thereof. The degradable heat shrinkable film comprises an upper film, a middle film and a lower film, wherein the upper film and the lower film comprise one or more of LDPE, MLLDPE and HDPE, and the middle film comprises 80-90 parts of a degradation masterbatch and 10-20 parts of a corn starch modifier; the corn starch modifier comprises corn starch, polyvinyl alcohol, plant protein fiber and a natural polymer; the degradation masterbatch comprises polyethylene powder, peroxide, metal salt and stabilizer. The degradable heat shrinkable film of the present application has better environmental performance, stronger degradability and more balanced mechanical properties than existing heat shrinkable films and degradable films. Through the synergistic effect of the biodegradation of the corn starch modifier and the chemical degradation of the degradation masterbatch, the excellent performance of the heat shrinkable film can be maintained, and it can also be quickly degraded after use, reducing the burden on the environment.

The invention discloses a supercritical gas foaming material and a preparation method thereof, and relates to the field of high polymer materials. When the supercritical gas foaming material is prepared, (3-iodopropyl) trimethoxysilane is prepared into pre-modified silsesquioxane, and then the pre-modified silsesquioxane sequentially reacts with sodium azide and 1-hydroxyacetylene to prepare modified silsesquioxane; the preparation method comprises the following steps: sequentially reacting trimethoxysilane with 1-allyl-1H-pyrrole and nano silicon dioxide to prepare pre-modified silicon dioxide; the preparation method comprises the following steps: reacting 1-allyl-1H-pyrrole with phosphorous acid to prepare a flame-retardant pyrrole monomer; reacting a flame-retardant pyrrole monomer, pyrrole and the pre-modified silicon dioxide to obtain modified silicon dioxide; and mixing polyethylene glycol terephthalate granules, the modified silicon dioxide and the modified silsesquioxane, and carrying out mould pressing foaming to obtain the supercritical gas foaming material. The supercritical gas foaming material prepared by the invention has excellent antibacterial, anti-aging, flame-retardant and antistatic effects.

The invention relates to the technical field of solar cells, in particular to a trans-ultra-wide-band-gap perovskite solar cell and a preparation method and application of the trans-ultra-wide-band-gap perovskite solar cell. Comprising the following steps: (1) cleaning a conductive glass substrate; (2) depositing a hole transport layer on the conductive glass substrate; (3) adding polyhexamethylene guanidine hydrochloride into a perovskite precursor solution, and depositing the perovskite precursor solution on the hole transport layer to obtain a perovskite light absorption layer; (4) depositing an electron transport layer and a buffer layer on the perovskite light absorption layer; and (5) depositing a metal electrode on the buffer layer. The polyhexamethylene guanidine hydrochloride (PHMG) is added into the perovskite precursor of the perovskite solar cell, so that the crystallization rate of a thin film is delayed, surface and interface defects are reduced, and the open-circuit voltage, the efficiency and the stability of the cell are improved.

The invention belongs to the technical field of high polymer materials, and particularly relates to an environment-friendly stabilizer for PVC foamed products and a preparation method thereof.The environment-friendly stabilizer is prepared from, by weight, 10-12 parts of a zinc salt main stabilizer, 38-42 parts of a calcium salt main stabilizer, 13-16 parts of a zinc oxide-mannitol composite material and 32-35 parts of coupling grafting modified hydrocalumite. The prepared environment-friendly stabilizer can improve the initial dyeing property and the long-term thermal stability of PVC, can relieve the local overheating phenomenon generated when azodicarbonic acid amine serves as a foaming agent and prevent a PVC base material from being decomposed at a high temperature, and the adopted coupling grafting modified hydrocalumite contains polar aluminate groups and also contains coupling grafting modified hydrocalumite. And the non-polar long-chain alkyl group is contained, so that the cohesion among PVC macromolecules can be weakened, the viscosity of a PVC melt is reduced, and the fluidity of the melt is improved.

The invention discloses a preparation method of a flame-retardant cyanate ester resin adhesive, which comprises the following steps: respectively preparing phosphorus-containing phenolic resin and silicon-containing phenolic resin, respectively preparing phosphorus-containing cyanate ester resin and silicon-containing cyanate ester resin from the phosphorus-containing phenolic resin and the silicon-containing phenolic resin and hydrogen bromide, and mixing the prepared phosphorus-containing cyanate ester resin and silicon-containing cyanate ester resin to prepare the flame-retardant cyanate ester resin adhesive. Phosphate ester is used for modifying phenolic resin and can be used as a connection point to connect the phenolic resin, so that a compact carbon layer can be formed on the surface of the resin during combustion, further pyrolysis of the resin can be prevented on one hand, and substances generated by thermal decomposition in the resin can be prevented from entering a gas phase to participate in combustion on the other hand; due to the existence of the silicon element, the stability of a formed carbon layer can be improved, the carbon residue amount of the carbon layer at a high temperature is increased, the structural strength of the carbon layer is enhanced, and the problem that the flame-retardant effect is reduced due to the fact that the carbon layer is easy to crack when the phosphorus content of the resin is relatively low is effectively solved.