1188 results about "Oil bath" patented technology

The invention discloses a petrochemical enterprise liquid fuel leakage and overflow and three-phase foam extinguishing agent oil bath / flowing fire extinguishing dynamic characteristic experimental device. Comprising a foam fire extinguishing system, a pool fire generation system, an overflow control system, a wind speed adjusting system, a spreading convergence system, an image acquisition system, a temperature acquisition system, a radiation heat flow acquisition system, a gas concentration acquisition system, an air velocity acquisition system, an oil film thickness acquisition system, a flow spreading monitoring system and a coordination control system. The experimental device is used for liquid fuel leakage, overflow and combustion under the influence of multiple parameters, and the gas-liquid-solid three-phase foam extinguishing agent extinguishing oil pool / flowing fire dynamic characteristics, transient development process and fire extinguishing efficiency. The dynamic fire extinguishing characteristic of the three-phase foam fire extinguishing agent, the coupling process of flowing, combustion, heat and mass transfer and the like under the influence of multiple factors and the spreading mechanism are disclosed, a theoretical basis is provided for perfecting fire prevention and control of chemical enterprises, and the fire rescue capacity is improved.

The invention discloses a preparation method and application of a carbon dioxide gas capture functional molecule modified nanogold catalyst. The preparation method comprises the following steps: synthesizing a modified molecule with a carbon dioxide gas capturing function through a chemical reaction; adding the modified molecules into an organic solvent, and uniformly mixing to obtain a solution; then adding a nanogold colloidal solution into the solution, uniformly stirring, and carrying out oil bath heating reaction; and after the reaction is completed, cooling to room temperature, carrying out suction filtration on the reaction liquid, respectively washing with ethanol and deionized water, and carrying out vacuum drying on the product to obtain the carbon dioxide gas capture functional molecule modified nanogold catalyst. In the electrocatalytic carbon dioxide reduction reaction process of the obtained catalyst, modification molecules are connected with the nanogold catalyst through chemical bonds, active sites of the nanogold catalyst are exposed, and meanwhile, an interface environment beneficial to the carbon dioxide reduction reaction can be provided; therefore, high activity, high selectivity and high stability of the molecular modified nanogold catalyst are realized.

The invention discloses a low-smoke flame-retardant cable outer layer material, and a preparation method of key components and a high-entropy alloy nano material comprises the following steps: grinding cerous nitrate, ferric nitrate, manganous nitrate, sodium hexahydroxyplatinate and copper nitrate into particles according to a ratio of 2: 1: 1: 1: 1; then adding 10-20 times by mass of a 32% tannic acid solution and 5-8 times by mass of a 10% glutaraldehyde solution, carrying out an oil bath at 65-70 DEG C for a reaction for 4-8 h, then carrying out overnight vacuum freeze drying to obtain mixed powder, placing the mixed powder in a crucible of a muffle furnace, then calcining the mixed powder at 1000-1200 DEG C under the protection of nitrogen flow for 4-10 h, and finally cooling the calcined mixed powder to room temperature. And cooling. The prepared outer layer material for the cable overcomes the defects that a conventional cable easily releases a large amount of toxic smoke during combustion, is poor in flame retardant property and contains halogen to pollute the environment.

The invention relates to a method for efficiently separating three components of lignocellulose biomass by using an alcohol-based ternary eutectic solvent, which comprises the following steps: uniformly mixing choline chloride, 4-chlorobenzenesulfonic acid and an organic alcohol solvent, heating in an oil bath, and stirring to obtain the alcohol-based eutectic solvent; the preparation method comprises the following steps: mixing an alcohol-based eutectic solvent with agriculture and forestry solid waste powder, putting the mixture into a reaction kettle, introducing carbon dioxide gas until the carbon dioxide gas forms subcritical carbon dioxide, and carrying out stepped progressive increase reaction under the reaction pressure of 2-4MPa to obtain an intermediate product; mixing the intermediate product with a reaction stopping agent, and performing suction filtration, cleaning, vacuum drying and grinding to obtain dry cellulose solid residual powder; adding deionized water of which the volume is 10 times that of the filtrate into the filtrate, standing, precipitating and centrifuging to obtain a lignin-enriched component; and adding a 5-30% ethanol solution, continuously stirring, centrifuging and drying to obtain the purified lignin. The lignin removal rate and the cellulose retention rate of the lignocellulose in the agricultural and forestry solid wastes are effectively improved.

The invention belongs to the technical field of catalyst preparation, focuses on a high-entropy alloy nanowire catalyst, and mainly relates to a preparation method and application of an AuCuAgPtNi catalyst. A one-pot wet chemical method is innovatively adopted, a 4-aminopyridine solvent and metal precursors of gold, copper, silver, platinum and nickel are fully and evenly mixed and placed in an oil bath pot at the temperature of 90 DEG C, then a reducing agent ascorbic acid is rapidly added, after specific reaction time, washing, drying and other operations are sequentially carried out, and the high-entropy alloy nanowire AuCuAgPtNi catalyst can be successfully prepared. The preparation method disclosed by the invention has the remarkable advantages of simple process, simple steps, convenience in operation and the like. In an alkaline environment, the prepared nanowire-shaped high-entropy alloy AuCuAgPtNi catalyst shows extremely excellent catalytic activity and selectivity for catalytic degradation of waste plastic polylactic acid, the waste plastic can be efficiently upgraded and converted into pyruvic acid, a new way is opened up for resource utilization of the waste plastic, and the application prospect is wide. The method has a wide application prospect in the fields of environmental protection and resource recovery.

The invention belongs to the technical field of photocatalysis, and particularly discloses a diatomic metal complex / CdS nanorod composite photocatalyst as well as a preparation method and application thereof. The specific preparation method comprises the following steps: synthesizing a pure CdS nanorod by using an EDA assisted solvothermal reaction; then carrying out Schiff base reaction, heating in an oil bath, and condensing and refluxing to synthesize a diatomic metal complex; and putting the diatomic metal complex and the CdS nanorod into a beaker, adding ethanol, uniformly stirring and drying to obtain the diatomic metal complex and CdS nanorod photocatalytic composite material, namely the target product. The CdS nanorod is of a rod-shaped hexagonal crystal structure, the diatomic metal complex is blocky and is loaded on the wall of the CdS nanorod after being compounded with the CdS nanorod, and the main morphology of the CdS nanorod is not changed. According to the invention, the diatomic metal complex is compounded with the CdS nanorod, so that photo-induced electrons and holes can be effectively separated, and the activity of photocatalytic formic acid decomposition to prepare synthesis gas (H2 + CO) is improved.

The invention relates to a sterilization type oxygen absorbent drying, mixing and vacuum packaging integrated system, and relates to the technical field of oxygen absorption master batch production, the sterilization type oxygen absorbent drying, mixing and vacuum packaging integrated system comprises two groups of dryers, a mixing machine, a vacuum generation system, an oil bath circulation system and a nitrogen supply system, the two groups of dryers comprise a first dryer and a second dryer; the dryer comprises a barrel, a swing driving mechanism and two swing shafts, the barrel comprises an inner shell and an outer shell, a heating cavity is formed between the inner shell and the outer shell, each swing shaft is provided with an oil inlet channel and an oil return channel, the outer shell is provided with a guide part in the heating cavity, and a heating channel allowing medium oil to flow is formed among the guide part, the inner shell and the outer shell. The heating channel forms a baffling section at the bottom of the inner shell, and medium oil can flow into the oil return channel along the heating channel and the baffling section. The medium oil flows from bottom to top, so that the medium oil with low temperature and high density is effectively prevented from being accumulated at the bottom of the barrel, materials are dried more uniformly by the medium oil, and the production efficiency of the oxygen absorbent is improved.

The invention discloses a preparation method of a photocatalytic ferroelectric heterojunction with a photothermal-pyroelectric effect, which comprises the following steps: step 1, preparing carboxylated BaTiO3 nanoparticles (BaTiO3NPs), adding a carboxylic acid modified ferroelectric material and a metal salt solution into a mixed solution of H2O and ethanol, and stirring to obtain a mixed solution; wherein the ferroelectric material is BaTiO3NPs, and the metal salt is In (NO3) 3.4 H2O; 2, adding a mixed solution of ammonia water and an ethanol solution into the mixed solution, reacting in an oil bath at 80 DEG C for 30 minutes, carrying out centrifugal washing and drying to obtain BaTiO3 / In (OH) 3, and carrying out high-temperature calcination in a muffle furnace to obtain a BaTiO3 / In2O3 heterojunction; and step 3, grinding the obtained BaTiO3 / In2O3 and NaBH4 according to a ratio, uniformly mixing the obtained BaTiO3 / In2O3 and NaBH4, and roasting the obtained mixture in a tubular furnace in an argon atmosphere to obtain the black BaTiO3 / B-In2O3 heterojunction. A semiconductor material with photo-thermal conversion performance is combined with a pyroelectric material, so that the prepared heterojunction has relatively high photocatalytic reduction activity, and the catalytic efficiency is improved.

The invention discloses a range-limited light-operated anti-tumor composite hydrogel drug reservoir and a preparation method and application thereof.The light-responsive drug-loaded nano hydrogel is loaded into a temperature-sensitive hydrogel system to form the range-limited hydrogel drug reservoir with light-operated drug release, the preparation method comprises the steps that PEG, LA and GA are added into a three-necked flask for an oil bath reaction, and the temperature-sensitive hydrogel system is obtained; after the reaction, purifying and freeze-drying to obtain a PLGA-PEG-PLGA block copolymer; the PLGA-PEG-PLGA segmented copolymer is dissolved in ultrapure water, and a PLGA-PEG-PLGA sol is obtained; and dissolving the drug-loaded PDA (at) P (NIPAAm-co-AM) nano hydrogel into the PLGA-PEG-PLGA sol, so as to obtain the confined light-operated anti-tumor composite hydrogel drug reservoir. The confined light-operated anti-tumor composite hydrogel drug reservoir has light-responsive drug delivery performance, not only has space-time controllability of drug release, but also weakens the problems of photothermal effect and the like in light-assisted therapy, so that accurate tumor therapy can be realized.

The invention discloses application of AgNWs (at) CdZnS2 (at) Cd, Zn-ZIF-8 core-shell structure in photocatalysis and extraction of uranium from seawater, and a method comprises the following steps: filling propylene glycol containing PVP into a bottle, and magnetically stirring and heating in an oil bath; the preparation method comprises the following steps: firstly, adding NaCl into the mixed solution, continuously stirring, adding an AgNO3 solution, magnetically stirring and heating the mixed solution, collecting precipitates, and washing the precipitates with acetone and ethanol respectively to obtain gray AgNWs; the preparation method comprises the following steps: adding 2-methylimidazole into an organic solvent solution containing organic amine, mixing AgNWs, adding into an organic solvent solution of cadmium salt and zinc salt, stirring at room temperature, standing, and carrying out solid-liquid separation to obtain AgNWs (at) ZIF8; the preparation method comprises the following steps: adding AgNWs (at) ZIF8 into an organic solvent, dropwise adding an organic solvent solution of the AgNWs (at) ZIF8 into the organic solvent containing thiourea in a grinding process, heating the mixture in a water bath, carrying out vacuum drying at room temperature, and cooling to room temperature after the reaction is finished, so as to obtain the AgNWs (at) CdZnS2 (at) Cd, Zn-ZIF-8 photocatalytic material. According to the invention, AgNWs (at) ZIF8 is used as a precursor to prepare an AgNWs (at) CdZnS2 (at) Cd, Zn-ZIF-8 core-shell structure, and the core-shell structure has excellent ability to extract uranium from seawater.

The invention discloses a method for preparing furfuryl amine by reductive amination of biomass-based furfural, which comprises the following steps: adding furfural, a catalyst, ammonia water and a solvent into a closed reaction kettle in proportion, replacing air in the reaction kettle with high-purity hydrogen, and reacting in an oil bath pan for a period of time to obtain a target product furfuryl amine, the nano-catalyst provided by the invention is a nitrogen-doped porous hollow carbon sphere loaded nano bimetallic catalyst, takes noble metal and non-noble metal as a metal active center together, and has adjustability of macroscopic size and microstructure at the same time; the method has the advantages of simple reaction system, mild conditions, no pollution to the environment, high efficiency, energy conservation, low cost, few byproducts, high yield, high selectivity and the like, the furfural is efficiently converted into furfuryl amine at low temperature and low pressure within a short time, the used heterogeneous catalyst is stable and easy to recover, a new thought and direction are provided for enterprise production and scientific research, and the method is suitable for industrial production. The method has great significance on development and utilization of biomass-based furfural.

The invention discloses a flame-retardant thermoplastic polyurethane elastomer material and a preparation method thereof, and belongs to the technical field of modified nano materials. The preparation method comprises the following steps: dissolving melamine, phytic acid and boron nitride in deionized water, carrying out oil bath, adding a coupling agent, stirring, carrying out vacuum filtration, washing with water, and drying to obtain a layered nano flame retardant; the preparation method comprises the following steps: dispersing a flame retardant in deionized water containing a nonionic dispersant, and carrying out ultrasonic treatment; the preparation method comprises the following steps: reacting polyether polyol with diisocyanate to obtain a primary prepolymer; adding other auxiliary agents, stirring, and carrying out gradient heating polymerization; and injecting into a mold, curing for 6-12 hours at 105-125 DEG C, and drying for 12-24 hours at 80-90 DEG C. A phosphorus-nitrogen-silicon ternary synergistic flame-retardant system is introduced, the boron nitride nanosheet surface grafting and dynamic pre-polymerization-gradient heating process is optimized, the dispersity is improved, and smoke suppression and thermal stability are achieved. Compared with the prior art, the flame retardant efficiency is high, the mechanical property is excellent, and environmental friendliness is achieved.

The invention discloses a non-noble metal copper-based catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a copper source and a second metal source in a solvent to obtain a precursor prefabricated solution, dropwise adding an alkaline solution to adjust the pH value of the precursor prefabricated solution to 7-13, keeping for 4-12 hours in an oil bath environment of 60-100 DEG C, aging, filtering, washing and drying to obtain a solid precursor; and putting the obtained solid precursor into a muffle furnace, heating to 200-800 DEG C in an air atmosphere, and roasting for 1-9 hours to obtain the non-noble metal copper-based catalyst. Wherein the second metal source is an aluminum source, a magnesium source, a zinc source, a zirconium source or a cobalt source; the catalyst can realize complete conversion (100%) of acetylene and selectivity of more than 95% of ethylene at a low temperature (180 DEG C) and a high space velocity (18000 ml / gcat / h), does not inactivate after more than 150 h under repeated cycle tests, and has important significance for industrial production.

The invention discloses a bimetallic MOF material and a preparation method and application thereof. The preparation method comprises the following steps: dispersing organic lanthanum salt, organic ferric salt and organic ligand in an organic solution, stirring, and carrying out ultrasonic treatment to obtain a mixed solution; adding alkali into the mixed solution, and then carrying out ultrasonic treatment to obtain a precursor; heating the precursor in an oil bath, and naturally cooling after the reaction is finished; the reactants are separated, dried and ground into powder, and the bimetallic MOF material is obtained. The bimetallic MOF material has adsorption and fluorescence detection functions. The bimetal MOF material prepared by the method disclosed by the invention has very high adsorption capacity on fluorine ions in water, and the maximum adsorption capacity of the bimetal MOF material reaches 400.860 mg / g. And the detection limit of the linear range is 0-80 [mu] M.

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention discloses a nitrogen-doped oxygen-vacancy-rich three-dimensional flower-shaped bismuth oxide electrocatalyst as well as a preparation method and application thereof, relates to the technical field of electrocatalysts, and solves the problems that a traditional bismuth oxide catalyst is insufficient in electron transfer capability and low in active site utilization rate. The preparation method comprises the following steps: dissolving bismuth nitrate, polyvinylpyrrolidone and sodium oleate in a mixed solvent of methanol and N, N-dimethylformamide, and stirring and dissolving to obtain a solution A; the preparation method comprises the following steps: dissolving 1, 3, 5-tri (4-carboxyl phenyl) benzene in a mixed solvent of methanol and N, N-dimethylformamide, and stirring and dissolving to obtain a solution B; and adding the B into the A, uniformly stirring, heating in an oil bath, reacting under magnetic stirring, cooling to room temperature, filtering, washing and drying the product to obtain white powder, calcining in a tubular furnace to obtain three-dimensional flower-shaped Bi2O3, putting in the tubular furnace, introducing argon, introducing ammonia gas, heating, and carrying out heat preservation reaction to obtain the electrocatalyst. The catalyst can be used for catalyzing nitrogen reduction synthesis ammonia reaction.

The invention belongs to the technical field of all-vanadium redox flow battery diaphragms, and particularly discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyetheretherketone and concentrated sulfuric acid, and carrying out water bath heating reaction to prepare a sulfonated polyetheretherketone solid; molybdenum disulfide and methylbenzene are mixed and subjected to ultrasonic treatment, 1, 3-propane sultone is added, oil bath heating is conducted, and sulfonated molybdenum disulfide powder is prepared; the preparation method comprises the following steps: mixing and stirring sulfonated molybdenum disulfide powder, polyaniline and a DMF (Dimethyl Formamide) solution, performing ultrasonic treatment, adding a sulfonated polyether-ether-ketone solid, stirring to obtain membrane casting slurry, coating a glass plate with the membrane casting slurry, drying to form a membrane, and soaking the membrane in a sulfuric acid solution and deionized water in sequence to obtain the sulfonated polyether-ether-ketone / polyaniline composite membrane. The invention discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyetheretherketone / polyaniline composite membrane has high proton conductivity, can maintain relatively low vanadium ion permeability and can improve the electrochemical performance of an all-vanadium redox flow battery.

The application discloses a preparation method of carbon aerogel material for light electromagnetic shielding, and comprises the following steps: adding resorcinol, phloroglucinol, a template agent and formaldehyde into pure water, stirring and dissolving to obtain a precursor solution; adding the precursor solution into white oil containing a surfactant, emulsifying, heating in an oil bath and fully reacting; centrifugal separation to obtain powder, high-temperature carbonization, dispersion in oleylamine, addition into a stock solution containing nickel acetylacetonate, triphenylphosphine and oleylamine, high-temperature reaction and cooling, addition of a mixture of hexane and ethanol to obtain a product; centrifugal separation and washing to obtain light high-electromagnetic-shielding carbon aerogel. The carbon aerogel material for light electromagnetic shielding prepared by the method has the advantages of small density, high efficiency, corrosion resistance, high electromagnetic shielding efficiency, high product yield and the like, and by controlling the nucleation and growth rate of Ni2P, the Ni2P nanoparticles can be uniformly grown on the carbon aerogel microspheres, and the method is suitable for application in large-scale industrial production.

The invention discloses a hydrophilic carbon-based material modified high-entropy alloy water electrolysis hydrogen production catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst preparation. Comprising the following steps: 1) adding a hydrophilic carbon-based material and mixed metal salt into an ethylene glycol solution, and ultrasonically mixing uniformly to obtain a reaction solution; and 2) heating an ethylene glycol solution to 200-240 DEG C through an oil bath, then slowly adding the reaction liquid prepared in the step 1) into the ethylene glycol solution, carrying out heating treatment for 0.5-2 hours, cooling, and centrifuging to prepare the carbon-based material modified high-entropy alloy water electrolysis hydrogen production catalyst. The prepared hydrophilic carbon-based material modified high-entropy alloy water electrolysis hydrogen production catalyst has high activity, and generated hydrogen bubbles are smaller and can be separated from the surface of an electrode more easily.

The invention belongs to the technical field of inorganic powder, and discloses polymer-coated modified heavy calcium carbonate composite particles as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing and stirring heavy calcium carbonate and a mixed solution of NaOH and Na2CO3, and carrying out suction filtration, washing and drying; adding KH-570 hydrolysate into the obtained surface hydroxylated ground calcium carbonate, continuously stirring in an oil bath pan, carrying out reflux condensation reaction for 3 hours, carrying out suction filtration, and drying to obtain KH570-OH-GCC; sequentially adding lauryl sodium sulfate, deionized water and KH570-OH-GCC, and adding an initiator for reaction; dropwise adding a mixed solution of butyl acrylate and ethylene glycol dimethacrylate, and reacting for 2 hours after dropwise adding; and adding an emulsifier, continuously stirring, dropwise adding a mixed solution of methyl methacrylate and allyl methacrylate, reacting for 2.5 hours after dropwise adding, cooling, carrying out suction filtration, and drying to obtain the polymer-coated modified heavy calcium carbonate composite particles.

The utility model discloses a capacitance method dielectric constant test system, which comprises a reaction kettle, a constant temperature oil bath pan, a data acquisition unit, a computer, a capacitance tester, a temperature transmitter, a pressure sensor and a capacitance test clamp assembly, and is characterized in that the reaction kettle is arranged in the constant temperature oil bath pan and is provided with a sealing cover; the measuring ends of the temperature transmitter, the pressure sensor and the capacitance tester are all arranged in the reaction kettle, the signal output ends of the temperature transmitter and the pressure sensor penetrate through the sealing cover to the outside of the constant-temperature oil bath pan and are connected with the input end of a data collector, the output end of the data collector is connected with a computer, and the computer is connected with the constant-temperature oil bath pan. The input end of the capacitance tester is connected with the capacitance test clamp assembly, and the output end of the capacitance tester is connected with the computer. The test system provided by the utility model simplifies test equipment, is accurate and reliable in measurement result, and can be used for measurement under high-temperature and high-pressure conditions.

The invention belongs to the technical field of nano composite materials, and relates to a preparation method of an iron diselenide / nitrogen-sulfur co-doped carbon nanosheet composite material, which comprises the following steps: putting cellulose, sodium bicarbonate and thiourea into a mortar, uniformly grinding, putting into a tubular furnace, calcining at high temperature under the protection of inert gas, naturally cooling, centrifugally separating and collecting the calcined powder, thereby obtaining the iron diselenide / nitrogen-sulfur co-doped carbon nanosheet composite material. The nitrogen and sulfur co-doped carbon nanosheets are obtained; ultrasonically dispersing iron nitrate nonahydrate in ethanol, heating in an oil bath until the ethanol is evaporated to dryness, and carrying out heat treatment to obtain an iron-based precursor; the obtained iron-based precursor, selenium dioxide and nitrogen and sulfur co-doped carbon nanosheets are ultrasonically dispersed in benzyl alcohol, the mixture is transferred into a reaction kettle with a polytetrafluoroethylene lining, the composite material is obtained after solvothermal reaction, and the morphology of the composite material is that iron diselenide nanoparticles are evenly and densely attached to the surfaces of the nitrogen and sulfur co-doped carbon nanosheets. The method is simple and easy to implement, suitable for large-scale production, easy to implement industrially and expected to be applied to the negative electrode of the hybrid supercapacitor.

The invention discloses a 3D printing multilayer composite all-solid-state electrolyte membrane and a preparation method thereof, and belongs to the technical field of all-solid-state electrolyte. The preparation method comprises the following steps: (1) solution premixing: mixing photosensitive resin, an aprotic polar solution, an inorganic filler, a photoinitiator and a lithium salt to obtain a mixed solution; (2) preparing a slurry A and a slurry B: taking the mixed solution, respectively adding polyvinylidene fluoride and polyoxyethylene, carrying out ultrasonic treatment, and then carrying out oil bath heating to respectively obtain the slurry A and the slurry B; and (3) preparing an electrolyte membrane: sequentially pouring the slurry A and the slurry B into a printing groove of a 3D printer for printing, taking a membrane printed by the slurry A as a middle interlayer membrane, taking a membrane printed by the slurry B as a top layer membrane and a bottom layer membrane, and after printing is completed, washing and drying to obtain the 3D printed multi-layer composite all-solid-state electrolyte membrane. According to the preparation method, penetration of lithium dendrites is effectively inhibited, and the overall stability and durability of the membrane are enhanced.

The invention belongs to the technical field of medical machinery, and particularly relates to an inflammation response type controllable degradation antibacterial body stent and a preparation method thereof.The preparation method of the antibacterial body stent comprises the following steps that PEG is heated in an oil bath in a vacuum and sealed environment and stirred for 1-3 h, the mixture is cooled to the room temperature, protective gas is introduced, and the antibacterial body stent is obtained. Sequentially adding lactide, glycolide and stannous iso-octoate into PEG (Polyethylene Glycol), continuously heating in the oil bath and stirring for 6-8 hours to obtain PEG-PLGA sol; adding the PEG-PLGA sol into dichloromethane for dissolving to obtain a dichloromethane solution of the PEG-PLGA, and adding an ice diethyl ether solution into the dichloromethane solution of the PEG-PLGA, so that the PEG-PLGA is separated out from the mixed solution. L-lysine (Lys) is grafted to a PEG-PLGA molecular chain end, a topological structure of Ag nanocrystals is formed on the surface, Lys-PEG-PLGA / AgCl particles are prepared, the antibacterial body stent is prepared through a 3D printing technology, the matching degree of the antibacterial body stent and an appendix focus in a patient is improved, and meanwhile controllable degradation is achieved with pH adjustment as an anchor point.

The invention discloses a glass etching device for laser induction and a fluoride-free etching method, and belongs to the technical field of glass etching.The etching device comprises an etching tank and an oil bath heating device, the etching speed can be increased by heating alkaline fluoride-free etching liquid, and the etching efficiency is improved. A composite stirring system of a magnetic stirrer and a stirring paddle can enable the fluoride-free etching liquid to circularly flow, so that the etching uniformity is improved, and the etching reaction is more favorably and stably carried out; the fluoride-free etching method adopts fluoride-free etching liquid, does not contain hydrofluoric acid, is safe and environment-friendly, and can avoid deterioration of through hole characteristics. Under the action of the fluorocarbon surfactant, the etching liquid has excellent wettability, and sodium hydroxide and potassium hydroxide in the etching liquid can perform high-selectivity etching on the glass after laser induction; the glass subjected to fluoride-free etching is high in surface smoothness and higher in through hole roundness, the surface and the inner wall of the through hole are smooth, the roughness of the inner wall of the through hole is smaller than 1 micron, the taper of the through hole is smaller, and a good etching effect is achieved.

The invention relates to the technical field of recycling lithium batteries by utilizing biomass, and discloses a waste lithium battery wet-process recycling method based on crop straws, which comprises the following steps: step 1, crushing the crop straws, sieving, drying to constant weight, reacting with dilute sulphuric acid, cooling, and filtering to obtain filtrate; step 2, pretreatment of waste lithium battery positive electrode powder; 3, wet recovery of waste lithium battery positive electrode powder: mixing the filtrate with the positive electrode powder, heating and stirring in an oil bath pan, carrying out suction filtration, and separating the filtrate for later use; and 4, measuring the content of lithium and calculating the recovery rate. According to the waste lithium battery wet recycling method based on the crop straw, reducing sugar and acid in the straw acid pretreatment hydrolysate serve as a reducing agent and a leaching agent for recycling the waste lithium battery, the lithium battery is recycled through a wet-chemical precipitation method, the cyclic utilization rate of agricultural waste is increased, and the recycling rate of the waste lithium battery is increased. And the pollution of the waste lithium battery to the environment is also reduced.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to a P-N flame retardant as well as a preparation method and application thereof. The preparation method of the P-N flame retardant comprises the following steps: (1) taking amino trimethylene phosphonic acid and adding a solvent for dilution; (2) adding 1, 3, 5-tri (2-ethoxyl) 1, 3, 5-triazine-2, 4, 6-triketone into the solution obtained in the step (1), and carrying out a constant-temperature oil bath reaction for 2-5 hours to obtain a P-N flame retardant precursor solution; (3) preparing an aqueous solution of an amino compound; and (4) dropwise adding the P-N flame retardant precursor solution into an aqueous solution of an amino compound, carrying out constant-temperature oil bath reaction for 5-10 minutes to generate white precipitates, continuing to react for 0.5-1 hour after the precipitates are generated, washing, carrying out suction filtration on the precipitates, and drying to obtain the P-N flame retardant. The P-N flame retardant disclosed by the invention is a white solid which is almost insoluble in water at normal temperature, and has a good flame retardant effect on a bio-based material.

The invention provides a preparation method of biomass high-water-absorption gel with bamboo powder as a raw material. The preparation method of the biomass high-water-absorption gel with the bamboo powder as the raw material comprises the following steps that firstly, 60-mesh bamboo powder is mixed with water, ultrasonic treatment is conducted for 1 min, and a bamboo powder mixed solution is prepared; 2, 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and acrylic acid (AA) are used as comonomers, and a sodium hydroxide solution is used for neutralization; and 3, uniformly mixing the neutralized monomer with the bamboo powder mixed solution, adding an initiator and a cross-linking agent, carrying out ultrasonic mixing dispersion for 1 min, introducing nitrogen for sweeping and blowing, and carrying out a reaction in an oil bath pan at 60 DEG C for about 20 min so as to obtain the high-water-absorption gel. The prepared super absorbent gel can effectively adsorb moisture, the adsorption capacity of the super absorbent gel to moisture at the room temperature can reach 1047 g / g at most, the bamboo powder is used as the raw material, the production cost is reduced, and the super absorbent gel has good application prospects.

The invention relates to a high-entropy iron-manganese-based transition metal layered oxide positive electrode material and a preparation method and application thereof, and belongs to the technical field of sodium ion batteries, and the preparation method comprises the following steps: dissolving an iron source, a copper source, a manganese source and a nickel source in an aqueous solution of ethanol and ethylene glycol to form a first solution; dissolving a precipitator in an aqueous solution of methanol and ethanol to form a second solution; heating a methanol solution in an oil bath, dropwise adding the first solution and the second solution, introducing Ar and H2, adjusting the pH value of the solution, reacting, standing and aging, carrying out solid-liquid separation, washing and drying a product, fully mixing and grinding the product with a sodium supplementing agent, titanium dioxide and an organic solvent, heating in Ar and N2, cooling and rapidly grinding to obtain the positive electrode material. The method is simple in process, good in controllability, cheap in raw material and wide in raw material source, the prepared material is uniform in particle size, uniform in distribution and high in crystallinity, the electronic and ionic conductivity of the material is improved, high reversible capacity and excellent cycling stability are obtained, the cost is reduced, and meanwhile the electrochemical performance of the material is improved.

The invention discloses a multi-metal layered hydroxide catalytic material and a preparation method and application thereof, and belongs to the technical field of catalytic materials.The preparation method of the multi-metal layered hydroxide catalytic material comprises the following steps that a one-pot solvothermal method is adopted, foamed nickel is soaked in a mixed solution for hydro-thermal synthesis, and the multi-metal layered hydroxide catalytic material is obtained; the multi-metal layered hydroxide catalytic material is prepared; wherein the mixed solution comprises a surfactant, a solvent and at least two of a nickel source, an iron source and a cobalt source. The CO2 desorption rate of the MEA solution is jointly improved through the synergistic effect of multiple metals and the # imgabs0 # acid site provided by the periphery of the metal hydroxide main layer. Under the condition that the desorption temperature (oil bath pan temperature) is 120 DEG C, the highest CO2 desorption rate of the FeCo (1 / 5) material with the best catalytic effect is increased to 7.68 mmol / min, and compared with 4.78 mmol / min under the blank condition, the desorption rate of the FeCo (1 / 5) material is increased by 60.7%, and the CO2 desorption rate is remarkably increased.