244 results about "Nitrogen atmosphere" patented technology

The invention belongs to the technical field of nickel electrode slurry preparation, discloses a preparation process of ultra-fine particle size roll-printed nickel electrode slurry for an ultra-high capacity MLCC, and aims to solve the problems that in the prior art, ultra-fine nickel powder is easy to oxidize, the cost of covering nickel nitride powder is high, a covering layer is easy to damage and agglomerate during dispersion, and the performance of the slurry is poor. The method comprises three steps of raw material pretreatment, synchronization of material dispersion and nitridation, post-treatment and nitrogen protection, wherein the pretreatment is used for removing impurities and preventing oxidation, dispersion and nitridation are carried out synergistically through a sand mill and an ultrahigh-pressure homogenizer in a graded regulation and control mode, the post-treatment comprises filtering, inspection and double-layer vacuum packaging, the raw materials are prepared according to a specific proportion, key parameters are precisely regulated and controlled, and finally the slurry is prepared. Roll printing adaptability and co-firing requirements are met, independent nitridation and reduction procedures are omitted, cost is reduced, slurry uniformity, dispersion stability and MLCC reliability are improved, and large-scale mass production can be achieved.

The invention discloses a high-refractive-index photo-thermal dual-curing optical adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: S1, preparation of high-refractive-index resin: placing biphenyl-4, 4 '-dithiol in a nitrogen atmosphere reaction kettle, adding a free radical thermal initiator, heating to 180-200 DEG C, reacting for 1-2 hours, and cooling to room temperature to obtain the high-refractive-index resin; dropwise adding alkenyl resin under the protection of nitrogen, stirring, reacting for 1-2 hours after dropwise adding, and cooling to room temperature to obtain high-refractive-index resin; s2, preparation of the optical adhesive: mixing the alicyclic epoxy resin, the high-refractive-index resin, the toughened resin, the liquid epoxy resin, the cationic photoinitiator and the cationic thermal initiator, and uniformly stirring in a dark place to obtain the adhesive. The problems that a traditional optical adhesive is poor in optical performance stability and unbalanced in mechanical and optical performance are solved. The application potential of preparing the high-performance optical adhesive is realized.

The invention discloses a monatomic / nitrogen-doped carbon sphere material and a preparation method and application thereof, and relates to the technical field of electrochemical detection.The preparation method comprises the following steps that glucose and hexadecyl trimethyl ammonium bromide are added into deionized water to be subjected to a hydrothermal reaction, and carbon spheres are obtained; mixing, grinding and calcining the carbon spheres and urea to obtain nitrogen-doped carbon spheres; and adding a metal salt solution into the nitrogen-doped carbon sphere suspension, stirring, filtering, washing, drying, and finally calcining in a nitrogen atmosphere to obtain the monatomic / nitrogen-doped carbon sphere material. The invention also discloses the monatomic / nitrogen-doped carbon sphere material prepared by the method and application of the monatomic / nitrogen-doped carbon sphere material in electrochemical detection of organic pesticides. According to the nitrogen-doped carbon sphere, the single metal atoms are anchored on the vacancies on the nitrogen-doped carbon sphere, so that the sensitivity, the detection limit, the selectivity, the stability and the anti-interference capability of the nitrogen-doped carbon sphere when the nitrogen-doped carbon sphere is used for electrochemical detection of organic pesticides are remarkably optimized, and the nitrogen-doped carbon sphere has important practical application value.

Device for producing a solid cryogenic abrasive from water, characterized in that the cryo-tube and loading unit form a single unit, wherein one or more spray nozzle blocks, equipped with identical or different interchangeable spray nozzles, are arranged in the cone of the cryo-tube such that the water can be sprayed from below into a cold nitrogen atmosphere of the cryo-tube, and the amount of nitrogen required for ice formation can be introduced from nitrogen nozzles attached to the tube and the lid, and the frozen water droplets immediately fall from the cryo-tube into the loading unit for absorption into the transport gas stream, assisted by the gas pressure generated during freezing.

This invention discloses an automated system and method for determining the trace total acid value of jet fuel. The system includes a sample moving unit, a titration unit, a nitrogen control unit, and a jet fuel total acid value determination unit. The sample moving unit moves the titration cup containing the sample below the titration unit. The nitrogen control unit maintains a nitrogen atmosphere inside the titration cup. The titration unit includes a porous burette, a burette tube, a photometric electrode, and a temperature electrode. The porous burette seals the titration cup. The titration unit injects titrant, mixed solvent, and mixed titration solvent into the titration cup, and determines the titration endpoint using the photometric and temperature electrodes. The jet fuel total acid value determination unit integrates the data from the titration unit to calculate the jet fuel total acid value. This invention eliminates endpoint errors that may result from subjective human judgment using manual indicators, and overcomes the need for machine vision technology, which requires the construction and intelligent training of a dataset of titration endpoint color images, in specialized instrument methods.

A separator for a non-aqueous secondary battery contains: a porous layer that is provided on only one side of the porous substrate, and that contains a resin having at least one bonding group selected from an amide bond, an imide bond, and a sulfonyl bond, in which, in the porous substrate, an absolute value of a difference between a temperature of an endothermic peak observed at 120° C. to 145° C., in a temperature raising process 1, and a temperature of an endothermic peak observed at 120° C. to 145° C., in a temperature raising process 2, is 1.50° C. or higher in DSC measurement when the temperature raising process 1 of continuously raising the temperature from 30° C. to 200° C. at a temperature change rate of 5° C. / min in a nitrogen atmosphere, and the temperature raising process 2 of lowering the temperature from 200° C. to 30° C. and raising the temperature from 30° C. to 200° C., are performed.

The application discloses a kind of eluent and its preparation method and application, preparation method includes: adding potassium methoxide methanol solution to the trimethylolpropane in molten state, after stirring, vacuumizing, then droping glycidol monomer, after reaction, add methanol, dry, obtain hyperbranched polyglycerol ether;Add carbonyl imidazole to the N,N-dimethylformamide solution of saturated fatty acid, after stirring and mixing, drop to the N,N-dimethylformamide solution of hyperbranched polyglycerol ether, reaction is heated in nitrogen atmosphere, after reaction, the product is treated, obtain temperature-sensitive hyperbranched polyglycidol ether eluent.The eluent prepared in the application can greatly reduce the treatment cost of elution waste liquid while efficiently removing heavy metals.

This invention provides an intermediate impurity of roxadustat and a method for preparing the impurity. The method for preparing roxadustat impurity I includes: dissolving compounds II and III in an organic solvent, and conducting a coupling reaction under a nitrogen atmosphere and a reaction temperature of 40–60°C in the presence of a base to obtain roxadustat impurity I. This preparation method features mild reaction conditions, simple operation, low time cost, high yield, and high product purity. It can efficiently obtain sufficient quantities of high-purity impurity reference standards, playing a positive role in the quality control of roxadustat intermediates and roxadustat active pharmaceutical ingredients, and has good application prospects.

The invention provides a preparation method of a perovskite precursor solution and an anti-radiation perovskite thin film, and belongs to the technical field of perovskite materials, and the method comprises the following steps: sequentially adding FAI, SnI2, SnF2 and EDAI2 into an usnic acid / alpha-tocopherol solution, carrying out magnetic stirring, then adding 1, 4-divinyl perfluorobutane and AIBN, continuing stirring, carrying out ultrasonic treatment, and filtering to obtain the perovskite precursor solution; and dropwise adding an arginine-PEDOT: PSS solution on the pretreated ITO substrate, carrying out spin coating, annealing treatment and cooling, further dropwise adding a perovskite precursor solution, carrying out spin coating, dropwise adding anhydrous chlorobenzene during spin coating, carrying out annealing treatment in a nitrogen atmosphere after spin coating is completed, and cooling to room temperature to prepare the anti-radiation perovskite thin film. According to the method, the stability of the film under the irradiation condition can be improved while defect and non-radiation compounding can be reduced.

The invention discloses a preparation method of a high-strength and high-toughness 17-4ph material. The preparation method comprises the steps of powder treatment, mixing, injection molding, degreasing, sintering and heat treatment. The preparation method comprises the following steps: pretreating fine powder in nitrogen to obtain nitrogen-containing fine powder, mixing the nitrogen-containing fine powder with coarse powder, then carrying out mixing, injection molding and degreasing, and finally carrying out high-temperature sintering and solid solution aging treatment in a nitrogen atmosphere. The prepared 17-4ph material has the excellent comprehensive performance that the relative density is larger than or equal to 97%, the hardness is larger than or equal to 40 Hrc, the tensile strength is larger than or equal to 1200 MPa, the yield strength is larger than or equal to 1000 MPa, and the ductility is larger than or equal to 20%, and the 17-4ph material is suitable for being applied to high-end medical instruments such as surgical robots.

The application relates to a preparation method of Mg and W double-element co-modified ultra-high-nickel binary positive electrode material, in particular to Mg and W double-element co-modified high-nickel binary positive electrode material. 0.01 (Ni x Mn y )W z O2, wherein x the value of x is 0.9-0.95, y the value of y is 0.05-0.1, z the value of z is 0.003-0.006. The method comprises the following steps: (1) preparing a nickel and manganese metal salt aqueous solution, a mixed alkali aqueous solution and a reaction bottom solution; (2) respectively adding the metal salt aqueous solution and the mixed alkali aqueous solution into the bottom solution at a certain flow rate to perform a constant-temperature precipitation reaction in a nitrogen atmosphere; (3) after the precipitation reaction is completed, cooling to room temperature, filtering, washing and drying the precursor; (5) after the dried precursor is mixed with metered lithium salt, magnesium oxide and tungsten trioxide, high-temperature solid-phase reaction is performed in an oxygen atmosphere to obtain the Mg and W double-element co-modified ultra-high-nickel binary positive electrode material. The Mg and W double-element co-modified high-nickel binary positive electrode material prepared by the method has a specific capacity of 179.19 mAh / g after 100 cycles at a 0.5C rate, a capacity retention rate of 93.1% or above, and good cycle and rate performance.

A gallium or indium doped S-1 molecular sieve encapsulated metal catalyst, its preparation method and application, especially in the application of low carbon alkane dehydrogenation. First, a gallium or indium doped S-1 molecular sieve slurry is prepared by a hydrothermal method, then the above catalyst is prepared through the steps of drying, impregnation, drying, dry gel crystallization reaction, calcination under nitrogen atmosphere, oxidation calcination under air atmosphere, and hydrogen atmosphere reduction. As a specific embodiment of catalyst performance evaluation, the above catalyst is evaluated for its performance in low carbon alkane dehydrogenation by taking propane dehydrogenation reaction as a model reaction. In the reaction process, no hydrogen is added, and a high propane conversion rate and propylene selectivity can be obtained, and the catalyst has good stability and good industrial application prospect. The preparation method is simple, and the dry gel material is crystallized, dried, formed, calcined and reduced to obtain the catalyst. In the preparation process, there is no water washing, filtration and other steps, which reduces the discharge of a large amount of wastewater containing metal and template, and is beneficial to industrial scale production.

Disclosed is a method for synthesizing aluminum nitride by microgravity combustion, which uses Mg4Al3 or Mg 17 Al 12 powder as raw material, and performs combustion in a microgravity and nitrogen atmosphere, and then purifies the combustion product using hydrochloric acid to obtain AlN powder. The method is applicable to both small particles (1 μm in diameter) and large particles (500 μm in diameter), and has a short synthesis time, high purity of the obtained aluminum nitride, and the heat generated by combustion can be used to maintain the temperature of the synthesis chamber, thereby reducing energy consumption.

The invention discloses an alpha-aminophosphoryl derivative as well as a preparation method and application thereof. The method comprises the following steps: by taking a quinoline derivative as a raw material and tetrahydrofuran (THF) as a solvent, adding boron trifluoride diethyl etherate in a nitrogen system at the reaction temperature of 0 DEG C, stirring for 15 minutes, reducing the temperature of the reaction system to T1 (-60 DEG C to-30 DEG C), adding a Grignard reagent into the reaction system, and reacting for 30 minutes to obtain a solution A; dissolving a phosphorus reagent in the organic solvent at room temperature in a nitrogen atmosphere to obtain a solution B; and adding the solution A into the solution B, reacting for 6-15 hours at the reaction temperature T2 (0-50 DEG C), and after the reaction is finished, extracting, concentrating and carrying out column chromatography to obtain the target product alpha-aminophosphoryl derivative. The invention provides a novel synthetic route for preparing the alpha-aminophosphonyl derivative, and various phosphorus reagents such as diaryl phosphorus oxide and phosphite ester can be compatible with the reaction. The alpha-aminophosphoryl derivative synthesized by the invention has a good antibacterial effect on gram-positive bacteria, especially staphylococcus aureus.

The invention belongs to the technical field of gradient nitrogen-containing metal laser additive manufacturing, and particularly relates to a method for manufacturing a gradient nitrogen-containing metal material through laser additive manufacturing and a product. Firstly, three-dimensional gradient distribution of nitrogen elements is preset in a three-dimensional model; slicing the model to generate a processing parameter packet containing a nitrogen partial pressure set value; laser is adopted to melt metal powder layer by layer in the nitrogen atmosphere, the nitrogen partial pressure is dynamically regulated and controlled within the range of 200 Pa-2 MPa at the speed larger than or equal to 101.325 kPa / 30 s, and the nitrogen content consistent with the preset gradient is formed in a solidification layer; further, the same layer is divided into more than or equal to two nitrogen control micro-areas, and the nitrogen partial pressure of the micro-areas is switched in a time-sharing manner, so that the regional jump or continuous gradual change of the nitrogen content in the single layer is realized. And after all layers are stacked, nitrogen-containing metal material products which are in gradient distribution in the three-dimensional space and the same layer are obtained.

The invention discloses a barrier alloy process method, which comprises the following steps of: providing a to-be-processed wafer; introducing nitrogen into the reaction furnace and setting a constant-temperature area of the reaction furnace to be at a first temperature; conveying the to-be-processed wafer from a furnace tube opening of the reaction furnace to a constant temperature area of the reaction furnace at a first temperature, wherein the surface of the to-be-processed wafer and air are subjected to an oxidation reaction in the conveying process to form a micro-oxidation protection layer; and a barrier alloy reaction is carried out in a constant-temperature area of the reaction furnace at the alloy temperature and under the nitrogen atmosphere. An oxygen inlet pipeline does not need to be specially arranged for supplying oxygen to the reaction furnace, and the surface of the to-be-processed wafer and air are subjected to oxidation reaction in the conveying process to form a micro-oxidation protection layer. According to the barrier alloy process method, the barrier alloy process can be carried out without specially producing a reaction furnace or additionally arranging an oxygen pipeline on the reaction furnace, the barrier alloy process method is suitable for more types of reaction furnaces, and the process cost is reduced; moreover, in the barrier alloy process, an oxygen inlet pipeline does not need to be arranged for supplying oxygen to the reaction furnace, oxygen consumption is not needed, and the process cost is further reduced.

The application provides a liquid nitrogen wetting contact angle measuring device for a super-low-temperature solid surface, comprising a super-low-temperature solid surface cooling assembly, a nitrogen atmosphere protection assembly, a liquid nitrogen titration assembly and a wetting contact angle observation assembly, wherein the super-low-temperature solid surface cooling assembly can make the sample quickly enter and maintain the super-low-temperature state during the test through liquid nitrogen circulation and a silver cooling plate. The nitrogen atmosphere protection assembly discards the commonly used vacuum scheme in engineering and adopts dry nitrogen protection to avoid the rapid gasification of liquid nitrogen under vacuum. The liquid nitrogen titration device realizes the dropping of liquid nitrogen at different heights, supports the related research on wetting contact angle measurement and droplet impact dynamics. The wetting contact angle observation assembly guarantees the observation of the droplet shape under the super-low-temperature environment through a light source plate, a blowing device and the like. The application fills the gap in the research on the wetting and spreading behavior of super-low-temperature fluid on a cooled solid surface and has important value for super-low-temperature fluid lubrication and super-low-temperature fluid transportation.

The invention discloses a method for preparing fatty tertiary amine with large steric hindrance without an external hydrogen source, and the specific implementation process is as follows: taking a compound A and a compound B as raw materials, and efficiently synthesizing a compound C through a hydrogen borrowing and reducing process of a copper-manganese bimetallic catalyst in a nitrogen atmosphere. The catalyst is prepared by adopting a step-by-step impregnation method: firstly, loading a manganese precursor on a carrier, and drying and roasting to form a manganese species which has the function of pre-adsorbing and fixing large-steric-hindrance amine molecules so as to effectively reduce steric hindrance; and then a copper precursor is loaded, and a manganese auxiliary agent promotes high dispersion of a copper active center, so that a C-OH bond of alcohol is efficiently activated. The method is mild in reaction condition, only water serves as a byproduct, the defects that high-risk reagents and high-temperature and high-pressure hydrogen sources are used and waste is generated in a traditional method are overcome, and the method has the advantages of being high in selectivity, good in atom economy, environmentally friendly, safe and the like and is suitable for large-scale production of drug intermediates and functional chemicals.

The invention discloses a method for removing refractory dyes in water by activating persulfate with iron-loaded biochar, and relates to the field of water treatment. The preparation method of the iron-loaded biochar comprises the following steps: taking red mud and bamboo leaves as raw materials, drying and grinding, mixing according to different proportions, carrying out pyrolysis carbonization in a muffle furnace in a nitrogen atmosphere at 800 DEG C, naturally cooling to room temperature, grinding and sieving, and finally obtaining the required iron-loaded biochar. The iron-loaded biochar prepared by the method has the advantages that waste can be treated by waste, the preparation cost is low, the persulfate catalytic activation performance is excellent, and the like. In addition, the material has certain magnetism, and the problem that heterogeneous catalysts are difficult to separate in practical engineering application can be solved.

This invention relates to the field of metallurgical technology, and more particularly to a method for preparing vanadium nitride using a mixed reducing gas. The method includes: grinding vanadium trioxide uniformly and pressing it into vanadium pentoxide tablets; placing the tablets in an electric furnace; first heating to 500-700°C under a nitrogen atmosphere; then introducing a mixed gas of methane, hydrogen, and nitrogen and holding for 20 minutes; then further heating to 800-850°C and holding for 20 minutes to obtain high-purity vanadium trioxide; subsequently heating to 1050-1150°C and holding for 1-5 hours to obtain crude vanadium nitride; stopping the introduction of the reducing gas and holding at 1050-1150°C for 0-4 hours under a nitrogen atmosphere; and then cooling to room temperature to obtain high-quality vanadium nitride. The technical solution mentioned in this invention features a low-temperature, short-time, and simple-to-operate vanadium nitride preparation process, enabling its large-scale application. Simultaneously, the resulting products are carbon monoxide and hydrogen, both of which can be recycled, thus helping to reduce carbon emissions.

The application discloses a preparation method of trace 10-component phenolic endocrine disruptor solution standard substance, which comprises the following steps: accurately weighing 10 kinds of high-purity phenolic compounds with accurate values, and dissolving the phenolic compounds in a mass spectrometry grade methanol solvent in a nitrogen atmosphere operation box to obtain a dissolved phenolic standard; filling nitrogen into a volumetric flask, pouring the dissolved phenolic standard into the volumetric flask, and dissolving and constant volume of the dissolved phenolic standard in a constant-temperature tank at 20.0 DEG C + / - 0.5 DEG C for 20 min, and then using the mass spectrometry grade methanol solvent to dissolve and constant volume to obtain a constant-volume phenolic solution; gradually diluting the constant-volume phenolic solution to 1 ug / L by using the mass spectrometry grade methanol solvent to obtain a diluted phenolic solution; pre-filling argon into a brown glass ampoule in a nitrogen atmosphere operation box, and then pouring the diluted phenolic solution into the brown glass ampoule, filling argon above the ampoule containing the solution, and fusion sealing the ampoule for refrigeration preservation.

The invention discloses a microwave crystallization preparation method of a transition metal nitride ultrathin nanosheet, which comprises the following steps: (1) dissolving a transition metal salt and Li3N in an o-xylene solution, then adding an ethylenediamine solution, fully stirring, heating the solution, and carrying out microwave crystallization to obtain a precursor solution; and carrying out centrifugal collection, washing and vacuum drying to obtain the amorphous transition metal nitride nanosheet. The transition metal salt is WCl < 6 >, VCl < 3 > or MoCl < 5 >; and (2) in a nitrogen atmosphere, the amorphous transition metal nitride nanosheet is subjected to rapid microwave heating, and the highly crystallized transition metal nitride nanosheet is obtained. The preparation process of the TMN nanosheet with the surface-enhanced Raman effect, provided by the invention, has very strong controllability, the thickness of the prepared nanosheet is about 1-2nm, the phenomenon of sintering or aggregation is avoided, and the TMN nanosheet with the surface-enhanced Raman effect has an outstanding surface-enhanced Raman spectrum effect.

This invention belongs to the field of powder metallurgy technology, specifically relating to a high-hardness, low-expansion, and low-oxidation cemented carbide and its preparation method. Doping is achieved through liquid mixing-evaporation crystallization, with precise control of the dopant element content achieved by coordinating temperature and pH control of the crystallization mother liquor. Furthermore, ball milling is eliminated, allowing the incorporated cobalt and chromium to undergo intermolecular mixing, which not only improves doping efficiency but also reduces impurities introduced by ball milling, ensuring the cemented carbide's low expansion coefficient and low oxidation increment. The powder is stored and mixed in a nitrogen atmosphere and at low temperature, reducing the probability of spontaneous combustion and ensuring production safety. Reduction carbonization using a nitrogen and hydrogen mixture not only promotes rapid one-step carbonization but also, by increasing the nitrogen flow rate, promptly removes the water vapor generated during reduction, reducing the risk of powder growth and ensuring the hardness of the cemented carbide.

The application discloses spherical silicon nitride powder and a preparation method and application thereof, and belongs to the field of nitride ceramic materials. The spherical silicon nitride powder has a beta phase silicon nitride content of greater than or equal to 95%, an average sphericity of greater than or equal to 0.80, a tap density in a range of 1.9-2.2 g / cm 3 , and a particle size in a range of 10-170 mu m. The preparation method comprises the following steps: in an organic solvent, taking beta-Si3N4 as an aggregate, taking silicon nitride precursors as an activator, taking a beta-diketone rare earth complex as a sintering aid, taking a mixture of polysilazane and PVB as a binder, and after pretreatment, high-temperature calcination is carried out under a nitrogen atmosphere to obtain the spherical silicon nitride powder. The prepared spherical silicon nitride powder can be used as a raw material for preparing an insulating heat-conducting material. The application can realize the preparation of high-density and high-thermal-conductivity spherical silicon nitride powder, and the prepared insulating heat-conducting material has high thermal conductivity.

The application relates to the technical field of electrocatalytic reduction of carbon dioxide, and provides a preparation method and application of a zinc-iodine diatomic pair (Zn-I / ICPs) carbon dioxide electro-reduction catalyst. The zinc-iodine diatomic pair is prepared by using nitrogen-doped carbon as a carrier and an in-situ gas-capturing MOF method, and the specific steps are as follows: first, ZIF-8 precursors are prepared by using zinc nitrate hexahydrate and 2-methyl imidazole as raw materials; then, the ZIF-8 and potassium iodide are co-pyrolyzed under a nitrogen atmosphere, the potassium iodide is used as an iodine source, zinc and iodine atoms are combined in an atomic dispersion form through a gas-phase doping mode, and a Zn-I diatomic pair is formed. The preparation method is simple and controllable, in the prepared Zn-I / ICPs, Zn sites and I sites successfully construct a synergistic catalytic center with complementary functions and electronic coupling, can effectively control an electrochemical microenvironment, accelerate water dissociation and proton transfer, and simultaneously highly effectively inhibit a hydrogen evolution side reaction, and the zinc-iodine diatomic pair can catalyze carbon dioxide electro-reduction to prepare carbon monoxide with high activity and high selectivity.

This invention provides a method for preparing high-nitrogen-content vanadium-containing steelmaking additive silicon vanadium ferronitride, comprising the following steps: 1) mixing vanadium oxide and a carbon source at a C / O molar ratio of 0.8-1, briquetting the mixture, and then placing it in a nitrogen atmosphere for a reduction nitriding reaction at 1100-1400 °C to obtain a one-step product; 2) crushing the one-step product obtained in step 1), mixing it with a silicon source and an iron source, briquetting the mixture, and then placing it in a nitrogen atmosphere for densification treatment at 1300-1500 °C to obtain high-nitrogen-content silicon vanadium ferronitride, wherein the silicon source is ferrosilicon and / or silicon. This invention can obtain high-purity, uniformly composed, and highly dense silicon vanadium ferronitride, improving the automation level and continuous production capability of the production process.

The application relates to the technical field of polyaryletherketone, and discloses a modified polyaryletherketone as well as a preparation method and application thereof. The structural formula of the modified polyaryletherketone is as follows: wherein the value range of n is 1-40% (m+n), and the value range of m is 60-99% (m+n). The preparation method is as follows: under a nitrogen atmosphere, decafluorobiphenyl ketone, 4-4'-difluorobenzophenone and biphenol are mixed, anhydrous carbonate, an aprotic polar solvent and a water-carrying agent are added, and a programmed temperature reaction is carried out at 140-200 DEG C to obtain the modified polyaryletherketone; wherein the molar ratio of the sum of the decafluorobiphenyl ketone and the 4-4'-difluorobenzophenone, the biphenol and the anhydrous alkali metal carbonate is 1:(1-1.1):(1-1.3). The modified polyaryletherketone is used for preparing a radiation cooling material.

A kind of porous biochar and its non-activated preparation method and application, biomass precursor is mixed with KOH solution, is placed in hydrothermal reactor, and solid-liquid mixture is obtained;The solid-liquid mixture is placed in a container, deionized water is added, and the liquid is collected by repeated washing;Add HCl dropwise to the liquid, and let the precipitate stand still, then dry after centrifugal washing to obtain a solid product;The solid product is carbonized in a nitrogen atmosphere at 300-500 DEG C, and then washed with water and dried to obtain a solid product;The obtained solid product is carbonized in a nitrogen atmosphere at 900 DEG C, and then washed with water and dried to obtain a porous biochar.The porous biochar prepared by the non-activated process provided by the application can efficiently load organic pollutants, and the adsorption capacity of phthalate can reach 999.33 mg / g, which can be used for water environment remediation.

This invention discloses a liquid-cooled microchannel powder metallurgy fabrication method, belonging to the field of radiator manufacturing technology. The invention employs a pre-stamping process to prepare copper heat dissipation fins, combined with customized spherical high-purity copper powder and composite polymer bonding particles. A uniform mixture is prepared through segmented high and low temperature and high and low speed stirring. This is then combined with metal powder injection molding, oxalic acid degreasing, nitrogen atmosphere constant temperature anti-oxidation pretreatment, and high-vacuum sintering processes, along with controllable molding and sintering parameters, to fabricate a copper liquid-cooled microchannel radiator. This invention effectively solves the problems of difficult molding of thin-walled pure copper microchannel structures, poor dimensional consistency, and susceptibility to defects and springback. It significantly improves the extrusion of copper materials in microchannel structures, the smoothness of the inner wall, and the overall density, strengthens the bond strength between the fins and the substrate, and eliminates leakage, corrosion, and heat dissipation attenuation under long-term liquid cooling cycles. The product yield is high, and the stability is excellent.

The application provides a preparation method of a perovskite precursor solution and an anti-radiation perovskite film, and belongs to the technical field of perovskite materials, and comprises the following steps: sequentially adding FAI, SnI2, SnF2 and EDAI2 into a usnic acid / alpha-tocopherol solution, magnetically stirring, then adding 1,4-divinyl perfluorobutane and AIBN and continuing to stir, ultrasonic treatment, and filtration to obtain the perovskite precursor solution; dropping an arginine-PEDOT:PSS solution on a pretreated ITO substrate, spin coating, annealing treatment, cooling, further dropping the perovskite precursor solution for spin coating, dropping anhydrous chlorobenzene during spin coating, performing annealing treatment under a nitrogen atmosphere after spin coating is completed, and cooling to room temperature to obtain the anti-radiation perovskite film. The application can reduce defects and non-radiation recombination while improving the stability of the film under radiation conditions.