246 results about "Isopropanolol" patented technology

The invention belongs to the field of cellulose ether. The embodiment of the invention provides sodium carboxymethyl cellulose, a preparation method thereof and a dust suppressant. The method comprises the following steps: mixing cellulose, solid alkali and a solid etherifying agent to obtain a first mixture; adjusting the humidity of the first mixture by using a humidity adjusting medium to obtain flowable wet powder; mechanically activating the wet powder to obtain a second mixture; carrying out heating treatment on the second mixture, so that the second mixture is subjected to an alkalization reaction and an etherification reaction; carrying out neutralization treatment on the substance obtained by the heating treatment to obtain a neutral mixture; and sequentially carrying out dissolution treatment and purification treatment on the neutral mixture to obtain the sodium carboxymethyl cellulose. According to the method disclosed by the embodiment of the invention, a large amount of organic solvents such as isopropanol are not needed, so that the generation of waste liquid is reduced, and the environment-friendly treatment cost and the production safety risk are remarkably reduced.

The invention discloses an AgBr-loaded ZnO material, a preparation method of the AgBr-loaded ZnO material and an isopropanol sensor. The method comprises the following steps: firstly, dissolving glucose and urea in deionized water, uniformly stirring, and then adding a zinc source; carrying out hydrothermal reaction on the obtained solution, and firing a product to obtain a ZnO material; and dispersing a proper amount of ZnO powder into deionized water, sequentially adding a bromine source solution and a silver source solution, stirring, collecting a product, washing, and drying to obtain the AgBr-loaded ZnO material. According to the method, the concentration of oxygen adsorbed on the surface of ZnO is remarkably improved by utilizing the overflow effect of noble metal Ag and photoelectron transfer between AgBr and ZnO, so that the chemical reaction between the oxygen and isopropanol is promoted. The prepared AgBr-loaded ZnO material has the characteristics of high sensitivity, rapid response, low detection lower limit, good selectivity and the like for isopropanol gas at a relatively low working temperature.

This invention relates to the field of plant component extraction technology, specifically to a method for efficiently extracting and purifying berberine. The method includes: (1) selecting dried stems of *Radermachera sinensis*, crushing and sieving them to obtain *Radermachera sinensis* powder; (2) weighing the *Radermachera sinensis* powder and mixing it with a 20-30% (w / w) ammonium sulfate solution, then adding a compound enzyme preparation for enzymatic hydrolysis, adding isopropanol to obtain a mixture, extracting the mixture using an ultrasonic-microwave synergistic extraction method, centrifuging the extracted mixture for 10-13 min at 3500-4000 rpm, removing the isopropanol layer by distillation to obtain a crude extract; (3) dissolving the crude extract in water and loading it onto a polar macroporous resin for multiple elutions to obtain berberine. Compared with the prior art, this invention uses an enzyme preparation followed by an aqueous two-phase solvent combined with ultrasonic-microwave extraction technology to promote the maximum release of berberine from *Radermachera sinensis* powder, thereby increasing the yield. Finally, a gradient elution with macroporous resin is used to achieve efficient extraction and purification of berberine.

This invention discloses a method for preparing and analyzing trans-4-aminocyclohexylacetic acid. The preparation method is as follows: 4-nitrophenylacetic acid undergoes catalytic hydrogenation in a solvent, followed by filtration. The filtrate is then treated with acid to obtain a 4-aminophenylacetic acid salt solution. The collected catalyst is activated. The 4-aminophenylacetic acid salt solution is mixed with isopropanol, barium hydroxide, tetrabutylammonium bromide, 18-crown ether-6, and dibutyl phthalate. The activated catalyst is then added to initiate a catalytic hydrogenation reaction. After the reaction, the reaction solution is cooled and filtered. The resulting solid is mixed with a preheated dilute sulfuric acid solution and stirred to form a slurry. The mixture is then filtered, and the filtrate is neutralized and filtered again. The collected filtrate is concentrated and crystallized. The crystallized precipitate is washed and dried to obtain trans-4-aminocyclohexylacetic acid. The method provided by this invention has high reaction efficiency, mild conditions, and is suitable for industrial production. It yields high product purity and reliability. Furthermore, the analytical method provided by this invention is accurate and reliable.

The invention relates to the technical field of genetic engineering, in particular to a recombinant microorganism and application thereof in preparation of glycine. The application comprises the following steps: producing glycine by adopting the recombinant microorganism; the recombinant microorganism comprises an enzyme combination and / or a nucleic acid molecule combination. The enzyme combination comprises threonine aldolase, ethanol dehydrogenase and isopropanol dehydrogenase; the threonine aldolase comprises an amino acid sequence as shown in SEQ ID NO. 1. The nucleic acid molecule combination is used for encoding the enzyme combination. According to the invention, threonine aldolase, ethanol dehydrogenase and isopropanol dehydrogenase are converted into microorganisms, and the constructed recombinant microorganisms can be used for decomposing threonine to produce glycine; and a specific system formed by specific isopropanol dehydrogenase, ethanol dehydrogenase and isopropanol dehydrogenase can also have a relatively high conversion rate under the condition of no addition of pyridoxal phosphate (PLP), and has important significance and economic value.

This invention belongs to the field of concentration detection technology and discloses a novel method and application for measuring isopropanol concentration based on tilt angle. The method includes: sampling and pretreatment of the mixed solution; tilt angle detection and specific gravity calculation; data fitting and concentration correlation; data transmission and cloud platform uploading; and real-time display and closed-loop monitoring. This invention is specifically adapted to the mixed solution system of dampening solution, isopropanol, and water in the water tank of offset printing presses. It is unaffected by small amounts of impurities in the solution, and the equipment is waterproof and dustproof, adapting to the industrial environment of printing workshops. Compared with traditional manual sampling or dedicated concentration meter measurement methods, this invention is simple to operate, responds quickly, has low detection costs, and can provide real-time concentration data feedback. It is suitable for online monitoring of isopropanol concentration in industrial production scenarios such as offset printing, and has strong practicality and promotional value.

The invention relates to the technical field of prime coat copper foils, in particular to a prime coat copper foil preparation method for improving the cycle performance of a silica material, which comprises the following steps: step 1, mixing pure water and polyacrylic acid, sequentially adding acetylene black, isopropanol, LLZO and LiNO3, and uniformly stirring to obtain prime coat slurry; step 2, coating a copper foil with the prime coat slurry, and drying to obtain a prime coat copper foil; lLZO and LiNO3 are introduced into the bottom coating, so that the volume deformation of the silica material can be effectively relieved, the puncture of lithium dendrites is inhibited, and the cycle performance and safety of the battery are improved.

The present application provides a forsythoside crystal form, which is a forsythoside hydrate crystal form, a forsythoside anhydrate crystal form, a forsythoside isopropanol compound crystal form, a forsythoside 1,4-dioxane compound crystal form, a forsythoside tetrahydrofuran compound crystal form or a forsythoside dimethyl sulfoxide compound crystal form. The present application also provides a preparation method of the forsythoside crystal form. The preparation method of the present application is safe and simple, and the prepared forsythoside crystal form has good stability.

The invention relates to a method for synthesizing a water-based paint cleaning solvent, which comprises the following steps: S1, isopropanolamine and ethylene glycol butyl ether are put into a dispersion stirrer according to a part ratio of 1: 9 for mixing to obtain a water-based cleaning solvent stock solution, and the stirring time of the dispersion stirrer is 30-60 minutes; s2, the aqueous cleaning solvent stock solution is put into a liquid storage tank of a cleaning system for automobile coating; s3, deionized water is put into a liquid storage tank of the cleaning system for automobile coating, the deionized water and the aqueous cleaning solvent stock solution are mixed and dispersed for 30-60 minutes in the liquid storage tank, and an aqueous cleaning solvent is obtained; the method has the advantages that the raw material input proportion can be adjusted according to requirements, and the system cleaning effect is improved; and the purchase amount of the cleaning solvent stock solution is saved.

The invention relates to the technical field of solid electrolyte material preparation, and discloses a method for preparing doped oxide-based solid electrolyte powder, and the method comprises the following steps: dissolving a titanium source substance, an aluminum source substance, a lithium source substance and a dopant source substance in one or a mixed solvent of two of ethanol, propanol and isopropanol to form a solution A; dissolving a phosphorus source substance, a lithium source substance and a dopant source substance in one or a mixed solvent of two of purified water and ethanol to form a solution B; under the stirring condition in a reaction kettle, dropwise adding the solution A into the solution B, and continuously stirring after dropwise adding to obtain a liquid precursor. Atom-level and molecular-level mixing dispersion of the oxide-based solid electrolyte raw materials in a liquid phase is realized, and compared with the characteristic that only macromixing can be realized in a ball milling method, the preparation method has the advantages that the preparation process is simple, and the cost is low. The uniformity of each component in the material can be obviously improved, so that the performance of the final material is improved.

The invention discloses the field of wafer wet cleaning, and particularly relates to a Malangei drying method compatible with multi-size wafers, which is applied to a drying machine comprising a lifting mechanism and a controller, and the method is executed by the controller and comprises the following steps of: firstly, receiving a wafer size specification signal, driving the lifting mechanism to adjust a wafer bracket to a corresponding preset process height, and adjusting the wafer bracket to a preset process height; the upper edges of the wafers with different sizes are all located in a preset drying working area at the top of the cavity, then isopropanol steam is guided in in an immersion state to construct a surface tension gradient, finally, a drain valve is controlled to be opened to enable the liquid level to be slowly lowered, and moisture is removed through the Malangori effect. Through physical position compensation of the lifting mechanism, it is ensured that the upper edges of wafers of different diameters can be accurately aligned to the preset drying working area at the top of the drying cavity, compatibility of single equipment to the wafers of different specifications is achieved, uniformity of chemical atmosphere concentration and a temperature field is ensured, and the drying quality and the flexibility of a production line are improved.

The presently claimed invention relates to an alkaline composition for cleaning a substrate comprising i) copper or copper alloy and ii) cobalt or cobalt alloy, the composition comprising: a) at least one pH adjustor selected from diglycolamine, 4,4-diethoxy-N,N-dimethyl-1-butanamine, 3-dimethylaminopropan-1-ol, dimethylaminoethoxyethanol, N,N-dimethylisopropanolamine, ethylethanolamine, N-methyldiethanolamine, 2-(2-(methylamino)ethoxy)ethanol, 3-(methylamino)propane-1,2-diol, 2-[2-[2-(2-methoxy- ethoxy)ethoxy]ethoxy]ethylamine, 2-[2-(2-aminoethoxy)-ethoxy]-ethanol, N-butyldiethanolamine, diisopropanolamine, N-methyldiisopropanolamine, monoethanolamine, 3-dimethylamino-1,2-propandiol, 2- amino-1-butanol, 2-(2-(2-(2-aminoethoxy)ethoxy)ethoxy)ethanol, prolinol, 1-methyl-2-pyrrolidinemethanol, 1-methyl-2-pyrrolidinemethanol, 1-methyl-3-pyrrolidinol, 2-amino-2-methyl-1-propanol, N,N-dimethylethanolamine, butylethanolamine, diethylethanolamine, 3-methoxypropylamine, 4-(2-hydroxyethyl)morpholine, 4-(dimethylamino)cyclohexanol, 2-amino-2-methyl-1, 3-propanediol, or diisopropylamine; b) at least one complexing agent selected from C2 to C12 hydrocarbon having at least two sulfonic acid or carboxylic acid groups; c) at least one polymeric dispersing agent having a weight average molecular weight ≥ 1000 g / mol; and d) a solvent comprising water.

The invention relates to a preparation method of a flower-like ternary transition metal oxide / carbon nanotube composite electrode material, which comprises the following steps: (1) according to the stoichiometric ratio of a synthetic product AB2O4, adding metal salts of A and B into absolute ethyl alcohol, methanol and isopropanol according to the molar ratio, stirring until the mixture is clear, then adding a proper amount of ammonium fluoride and glycine, and continuously stirring until the mixture is clear; adding carbon nanotubes according to a certain molar ratio, and ultrasonically dispersing uniformly to obtain a precursor solution; (2) pouring the precursor solution into a reaction kettle, and performing solvothermal reaction to obtain precursor powder; (3) putting the precursor powder into a glass tube, then putting the glass tube into a tubular furnace, introducing nitrogen, and calcining at the temperature of 200-350 DEG C to obtain ternary transition metal oxide / carbon nanotube composite electrode material powder; the synthesis process is simple, the synthesis time is short, the synthesis process is easy to control, the repeatability is good, and the synthesized product is high in purity and large in specific surface area.

The utility model relates to the technical field of petroleum chemical industry discloses a double loop pipe polyethylene device, including reactor, the top transverse fixedly connected with support of reactor, the top fixedly connected with mixing mechanism of support. In the utility model, through the setting of driving motor, rotating lever and stirring rod, isopropanol can be injected into the inside of reactor and isobutane is mutually soluble, driving motor works when starting at this moment, driving motor work drives rotating lever to rotate clockwise, rotating lever rotation drives stirring rod to rotate, and stirring rod rotation pushes material flow, diffusion to the kinetic energy of isopropanol fluid in the inside of reactor, and the shear force produced by stirring can break the concentration gradient and phase interface in the inside of material, promotes the diffusion mixing of molecular level to accelerate the uniform mixing of both, makes fresh isobutane more efficiently dilutes isopropanol, shortens the time of replacement to qualified concentration, reduces the time -consuming of circulating replacement in traditional craft.

The invention relates to the technical field of virus extraction kits, in particular to a large-volume sample virus nucleic acid rapid extraction kit and method.The large-volume sample virus nucleic acid rapid extraction kit comprises a protease K solution, magnetic beads, a lysis solution, a rinsing solution 1, a rinsing solution 2 and an eluent; the magnetic beads are hydroxyl magnetic beads; the lysate is prepared from guanidine isothiocyanate, Tris alkali, Tris hydrochloric acid, triton X-100, isopropyl alcohol and polyoxyethylene ether; the rinsing liquid 1 is composed of a guanidine hydrochloride solution and isopropanol; the rinsing liquid 2 is composed of absolute ethyl alcohol and purified water; the kit provided by the invention can easily obtain viral nucleic acid from a large-volume sample, is simple to operate, can extract a plurality of samples at one time, realizes rapid diagnosis, and makes up the vacancy of a kit for automatically extracting viral nucleic acid from a large-volume sample at high flux in the current market.

The invention relates to a preparation process of near-infrared fluorescent powder, in particular to nickel-containing near-infrared fluorescent powder and a preparation method thereof, a certain amount of barium carbonate, gallium oxide, nickel oxide and isopropanol are taken to be prepared into turbid liquid, and the nickel-containing barium gallate-based near-infrared fluorescent powder is prepared through the steps of grinding, drying, grinding, pressing, heat treatment, cooling, grinding and the like. Under the excitation of 635 nm light, the fluorescent powder presents ultra-wide band near-infrared luminescence composed of 1050-1400 nm light emission derived from matrix defects and 1300-1800 nm light emission of Ni < 2 + > ions; the light-emitting diode light source is more suitable for compact special near-infrared fluorescent powder conversion light-emitting diode light source design for high-resolution deep biological tissue imaging diagnosis equipment. Similarly, due to no ionizing radiation ultra-wide band NIR-II region emission, the system can be used in various biological tissue situations such as fat, muscle, endothelium and the like, and then development of multipurpose imaging diagnostic analysis technologies and equipment which are suitable for family daily medical treatment and are friendly and safe to special groups such as children, pregnant women, old people and the like can be promoted.

This invention relates to the field of medicinal chemistry, specifically to a capsaicin-like compound containing isopropanolamine, its preparation method, and its application. This type of compound has a structure as shown in general formula (I). The invention uses capsaicin and isopropanolamine as pharmacophores, connecting the two pharmacophores with different bridging chains to synthesize a series of capsaicin-like derivatives containing isopropanolamine. These compounds exhibit excellent inhibitory effects on plant pathogenic bacteria such as rice bacterial blight, citrus canker, rice bacterial leaf streak, and kiwifruit canker; and plant pathogenic fungi such as cucumber gray mold, pepper wilt, rapeseed sclerotinia rot, eggplant verticillium wilt, wheat scab, potato late blight, blueberry root rot, grape coccidioidomyces, dragon fruit anthracnose, and rice sheath blight, providing an important scientific basis for the research and development of new pesticides.

The invention discloses a biological tissue sample preparation sleeve solution, and belongs to the technical field of biological sample preparation. The stationary liquid comprises: 8-12% of an aldehyde cross-linking agent; 1-3% of a phosphate buffer system; and the balance of purified water. The dehydration liquid comprises the following components: 55-70% of an alcohol solvent; 10 to 20 percent of isopropanol; 10-20% of an ester organic solvent; 0.5 to 2 percent of a non-ionic surface active agent; the transparent liquid comprises the following components: 50-70% of a polyol compound; 10-20% of an ether cosolvent; 10 to 30 percent of isopropanol; the refractive index of the transparent liquid is 1.47 to 1.52; the cleaning solution comprises the following components: 60-85% of a polyol solvent; 10-20% of an ether solvent; 1-3% of an anionic surfactant; 0.1-1% of a complexing agent; and the balance of purified water. Tissue shrinkage is effectively reduced, the cell structure is kept complete, the transparency effect is improved, and microscopic observation and dyeing analysis are facilitated.

The invention relates to a residual stress detection method of a polycarbonate component and a detection reagent thereof. The raw materials of the detection reagent comprise absolute ethyl alcohol, ethyl acetate, isopropanol, cyclohexanone and dimethyl sulfoxide. Ester bonds in a PC molecular chain can be permeated by sulfoxide groups of DMSO, so that hydrogen bonds are damaged and chain segments are loosened. Ethyl acetate and isopropanol can permeate into gaps of PC molecular chains, so that the volume expansion of the material is caused to induce microcracks. The carbonyl group of cyclohexanone can form strong interaction force with the carbonic ester group in the PC molecular chain; the polymer is small in molecular size and can rapidly permeate into gaps of PC molecular chains to damage hydrogen bonds and Van der Waals force among PC molecules, so that the molecular chains are dissociated. Therefore, the detection reagent can enable the high residual stress part of the polycarbonate component to rapidly generate obvious cracks.

The invention provides a method for separating an ethanol-isopropanol-n-propanol mixture and a rectification device, and belongs to the technical field of extractive rectification. According to the method, 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM] [BF4] is adopted as an extraction agent, during extraction and separation by the method, the mass fraction of n-propyl alcohol can reach 99.9%, the mass fraction of ethanol is 99.87%, and the recovery rate of the extraction agent exceeds 99.9%; compared with a common organic extraction agent, the organic extraction agent has a better separation effect, high-purity ethanol and n-propanol can be obtained, and the problem of environmental pollution caused by volatilization of the common organic solvent can be avoided; the method has good application in extraction separation and recycling of an ethanol-isopropanol-n-propanol mixture.

This invention relates to a liquid tension control method for improving wafer drying efficiency, comprising: First, placing a wafer cassette connected to a oscillating mechanism into a drying tank, loading wafers into the cassette, and ensuring the drying tank and its dome are sealed together, with a small amount of gas evacuated; Second, injecting room-temperature nitrogen gas through the dome and injecting ultrapure water into the drying tank to wet the wafer surface; Third, after the wafer surface is wetted, performing the following operations: S1: Injecting a mixture of isopropanol and heated nitrogen gas into the drying tank using a dedicated integrated module, while simultaneously discharging ultrapure water at a controlled rate from the bottom of the drying tank; S2: During the ultrapure water discharge, operating the oscillating mechanism to carry the wafer in a planetary oscillation, accelerating the removal of water molecules from the wafer; Fourth, repeating the wafer drying process. This invention utilizes planetary arc-shaped oscillation drying technology to accelerate the removal of residual moisture from the wafer surface, achieving rapid wafer drying through effective control of liquid tension.

As one aspect, the present disclosure provides a bacterium of the genus Corynebacterium capable of producing isopropanol with high productivity. As another aspect, the present disclosure provides a method which enables the production of isopropanol with high productivity while suppressing the production of by-products.　In one aspect, the present disclosure relates to a bacterium of the genus Corynebacterium capable of producing isopropanol, the bacterium being produced by introducing into a bacterium of the genus Corynebacterium a specific gene (A) that encodes an enzyme having an activity of producing acetoacetic acid from acetoacetyl-CoA and / or a specific gene (B) that encodes an enzyme having an activity of producing acetone from acetoacetic acid in a manner that enables expression thereof. In another aspect, the present disclosure relates to a method for producing isopropanol, the method comprising: allowing a genetically modified bacterium of the genus Corynebacterium capable of producing isopropanol to carry out a fermentation reaction in a fermentation tank to produce a fermentation product containing isopropanol; continuously or intermittently withdrawing a portion of a reaction solution containing the fermentation product from the fermentation tank during the fermentation reaction; separating isopropanol from the withdrawn reaction solution by pervaporation; and supplying to the fermentation tank the reaction solution from which isopropanol has been separated.

The electronic isopropanol ton barrel cleaning device comprises a cleaning box body, a placing ball body used for placing a ton barrel is arranged in the cleaning box body, a plurality of sets of cleaning through holes are formed in the surface of the placing ball body, and the placing ball body is arranged in the cleaning box body in a rolling mode; a plurality of groups of mounting plates are arranged on the inner wall of the cleaning box body, high-pressure water guns are arranged on the mounting plates, and water outlets of the high-pressure water guns face the direction of the placed balls; the cleaning device has the beneficial effects that through collaborative design of the multiple sets of high-pressure water guns and the containing balls, the water outlet directions of the high-pressure water guns are tangent to the surfaces of the containing balls, high-pressure cleaning fluid penetrates through the cleaning through holes to impact and clean the surfaces of the ton barrels, and meanwhile the containing balls can be driven to roll in the cleaning box body; and the multiple sets of high-pressure water guns can be selectively started according to needs to regulate and control the rolling direction of the containing balls, so that the cleaning posture of the ton barrel is continuously adjusted in the rolling process.

The invention relates to an adhesive sheet and a portable electronic device. The present invention provides an adhesive sheet capable of achieving both chemical resistance and water resistance, and a portable electronic device including the adhesive sheet. A pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer, in which the pressure-sensitive adhesive layer contains a polyester-based polymer, the swelling ratio of the pressure-sensitive adhesive layer with respect to isopropanol is 2000 wt% or less, the swelling ratio of the pressure-sensitive adhesive layer with respect to oleic acid is 2000 wt% or less, and the glass transition temperature (Tg) of the polyester-based polymer is-10 DEG C to 10 DEG C.

This invention discloses a purification method for isopropanol, a reagent for spectroscopic analysis. The method includes: S1 mixing industrial-grade isopropanol with an alkali metal compound, adjusting the pH to 7.0–8.0, and obtaining a neutralized filtrate through solid-liquid separation; S2 continuously adsorbing and removing impurities from the neutralized filtrate by passing it sequentially through a molecular sieve adsorption unit, a modified activated carbon adsorption unit, and a γ-alumina adsorption unit; S3 subjecting the adsorbed liquid to staged total reflux distillation, controlling the reflux ratio at 5–15:1 and the total reflux time at 1–3 hours, and collecting the top product; S4 filling and sealing the top product under inert gas protection. This invention achieves closed-loop control of the entire process by setting online conductivity and moisture sensors, infrared detection devices, and online concentration sensors at key nodes. This method has the advantages of high purity, low energy consumption, high recovery rate, and process controllability, and is suitable for the industrial production of high-purity isopropanol for spectroscopic analysis.

The invention relates to a composite electrostatic eliminator and a preparation method thereof, and relates to the technical field of chemical assistants, the composite electrostatic eliminator comprises isopropanol, cetrimonium chloride, fatty alcohol-polyoxyethylene ether, polyvinyl alcohol, polyethylene glycol, triethanolamine, isothiazolinone, propylene glycol, disodium ethylene diamine tetraacetate, essence, modified carbon nanotubes, and a hydrophobic ionic liquid. The water-based polyurethane resin is prepared from water-based furan polyurethane, non-ionic water-based furan polyurethane, bismaleimide and the balance deionized water. Modified carbon nanotubes and hydrophobic ionic liquid are uniformly dispersed in a coating through electrostatic anchoring of cetrimonium chloride and emulsification of fatty alcohol-polyoxyethylene ether, an electron tunneling network in a low-humidity environment is formed, and it is ensured that the electrostatic dissipation capacity of the coating of the electrostatic elimination agent in the low-humidity environment is improved; a dynamic cross-linked network is formed through a Diels-Alder reaction generated by the nonionic waterborne furan polyurethane and the bismaleimide, a conductive path in a damaged area can be rebuilt under external thermal excitation, and the functional durability is improved.

The invention relates to the technical field of tin alloy solder, and discloses a preformed soldering lug with high welding strength, which comprises a soldering flux layer and a soldering lug main body, the soldering flux layer comprises esterified rosin, methyl ester, succinic acid, glutaric acid, cyclohexylamine hydrochloride and isopropanol; the soldering lug main body comprises tin, antimony, silver, bismuth, copper and nickel; by adding silver, bismuth, copper, nickel and metal elements in the alloy into the soldering lug, the mechanical strength of the solder alloy can be improved, compared with common tin-copper alloy, the mechanical strength of the soldering lug is greatly improved, the soldering flux is high in activity but low in corrosivity, stable high-mechanical-strength intermediate layer alloy is formed, and the soldering flux can be applied to the field of soldering. The welding strength and the tensile strength are more excellent, the soldering flux layer and the soldering lug main body have the synergistic effect, so that a welded part has high tensile property after being welded, and the mechanical strength of the solder alloy can be improved by adding silver, bismuth, copper and nickel in the alloy into the soldering lug and metal elements.

The invention relates to a pretreatment method of a solid electrolyte, the solid electrolyte comprises lithium lanthanum zirconium oxide, the pretreatment method comprises the following steps: obtaining a residual lithium reference value of lithium ions in the solid electrolyte, the residual lithium reference value being the mass percentage of the lithium ions in the solid electrolyte; adding a solid electrolyte to a solvent to obtain a hydrolysis resistant suspension, where the solvent includes isopropanol for less than 1% of the residual lithium reference value; for the residual lithium reference value larger than or equal to 1% and smaller than 3%, the solvent comprises isopropanol and water, and the mass ratio of the water to the isopropanol is (1-2): (8-9); and separating the hydrolysis-resistant suspension to obtain a hydrolysis-resistant clear liquid. In addition, the invention also provides a method for measuring the surface residual lithium value of the solid electrolyte.

The invention discloses a WS2 / W composite material, a preparation method thereof and application of the WS2 / W composite material in a sodium-sulfur battery. The preparation method comprises the following steps: uniformly stirring isopropanol and acetone to obtain a mixed solution A; weighing tungsten hexachloride, adding the tungsten hexachloride into the mixed solution A, and uniformly stirring to obtain a mixed solution B; transferring into a reaction kettle, sealing and putting into a drying oven for reaction; after the reaction is finished, carrying out suction filtration and washing on a product by using industrial alcohol, and drying in a vacuum oven to obtain W18O49 powder; the method comprises the following steps: weighing W18O49 powder and sublimed sulfur, respectively and correspondingly placing the W18O49 powder and sublimed sulfur in a first porcelain boat and a second porcelain boat, then placing the second porcelain boat in the first porcelain boat, placing the second porcelain boat in a tubular furnace, introducing argon into a furnace chamber of the tubular furnace, after the pressure of the furnace chamber is increased to 0.2-0.3 MPa, keeping the airtightness of the system, heating to 1100-1300 DEG C at the rate of 20 DEG C / min, keeping the pressure at 0.2-0.3 MPa in the heating process, and keeping the temperature for 2-3 hours; and after the temperature reaches 1100-1300 DEG C, continuously preserving heat for 2 hours, introducing argon, cooling to room temperature, and collecting to obtain WS2 / W powder. The problems of poor conductivity of the sulfur positive electrode, polysulfide shuttle effect and slow reaction kinetics are solved.

The invention belongs to the technical field of phosphorescent materials and information encryption materials, and discloses a light activation time dependent afterglow carbon dot polymer film and a preparation method and application thereof.The preparation method comprises the following steps that o-phenylenediamine serves as a carbon source precursor, isopropanol serves as a solvent, a reaction is conducted for 6-8 h at the temperature of 180-250 DEG C under the closed high-pressure condition, and a CDs solution is obtained; and adding the CDs solution into the ABS resin, uniformly mixing to prepare a polymer film, and curing to obtain the ABS / CDs composite film. The obtained polymer film shows double light activated delayed luminescence, emission is generated at 521 nm and 652 nm respectively, the reversible afterglow discoloration process from red to orange to yellow to green is achieved, and the optical memory effect as long as 40 minutes is shown under the environmental condition. The method is a first carbon dot-based system which realizes a photo-activated TEAC behavior and has a reversible optical memory characteristic. Compared with inorganic and organic materials, the carbon dot polymer film has the advantages of simplicity, convenience, rapidness, no metal, long service life, economy, effectiveness, low toxicity and the like.